 Hello. Welcome, everybody. We are here in a unique situation we have for the first time in IHE's history. I think a guest lecturer who is offering a free course in our OpenCourse R platform. And I can see that we have already 110 people in the livestream. I'm not going to talk much, but I welcome you all. Please use the chat to introduce yourself. And if you have any questions, also put it in the chat. And then later we will give those questions to Sol Montoya from Hatari Labs. He's our guest. Later he will be joined by Gabriella. We'll also answer questions in the chat. So I'm going to give the floor to Sol Montoya. Sorry. Hi. Hi. Do you hear me? I hope that you hear me well. My name is Sol Montoya. I am from Hatari Labs. I am a state or geologist, a numerical modeler. We are going to give a course in groundwater modeling. This course is intended for general audience. I mean, this course is intended for people that do not know nothing about groundwater modeling, for people that have some knowledge in hydrogeology, and for people that were using another software and they want to switch to this open source software. OK. I will share my screen. So this is the last time that I actually will see my face. There is a great support over YouTube. So when you have any questions, you can make your questions through YouTube. Gabriella will be supporting and giving answers to YouTube. And I will ask Sol, this is a new step on online classes because I want to know how well you are doing. So if you are doing well, I'm going to ask some questions about if you are, at this point, please type yes 1, yes 2, yes 3, or yes 4. Why? Because for me, it's the feedback. If you are doing great, or maybe you get lost, OK? So if I don't receive this feedback, we might have some problems because I can do, I've been dealing with software more, like 15 years with the groundwater software. And I can do things much, much quicker. So if I don't hear from you, I think that I can do a much faster speed, a faster step. OK, so Hans, if everything is right with the mission, can I ask, can I start the course? Yes, so go ahead. Everything is on. And we have 99 people in the live stream, and they're interacting. So go ahead. OK, so I will share my screen. OK, so let's have a review on the objectives of this course. With this course, you will know the modern news environment tools for modeling. Know the potential of modern news to build mudflow models, redesign of water conditions, and to build and simulate numerical models. We had a lab that was designed as a website for a consulting company, but later on it turned into a blog. And in this blog, we have a lot of stuff on groundwater modeling, maybe. And it might be like the main repositories of tutorials on mudflow. But these tutorials are applied tutorials. So in this course, we will give the basics in order to understand the software. So you can do kind of a tutorial or a case that is close of what you are doing or your interest. OK, great. So on the first class, we are going to have a description of modern news, the bottoms, and so on. However, there is a tutorial here. There was a tutorial here that is this tutorial to install mudflow 6 and modern news 4. I hope this was on the that you have more mudflow 6 already on your computer. I hope so. And if you have this on your computer, please type yes1. So now we start with these questions. If you have followed this tutorial and then you have mudflow 6 and modern news 4 on your computer, please type yes1. Yes1. Yes1. The number is really important because we are going to be yes15 or something like that. So it's really good. OK, great. So you are great. In the tutorial, let's see the website of modern news, but because it's really important to see where everything comes from. OK, material. OK, let's go to. Let's talk about a little more news. Yeah, modern news is a graphical user interface. So what does it mean, graphical user interface? It's the normal environment where you have buttons to do actions. So it's similar of what you do in Windows. So you have a button that opens a document. You have a button where you can edit. You have a button where you can say, yeah, this is a graphical user interface. And modern news is a graphical user interface for groundwater models. And in modern news, you can do and you can work. You can build. You can run. And then you can analyze models that were done, not only modflow. OK, so you can work models in modflow6, modflow2005, modflowLGR, modflowLGR2, modflowNWT, modflowCFP, modWHM, modPaxonRembarket, passedS shocking, and empty3DMS and empty3DD. So as you see, there is a lot of model types done by the USGS. OK. Well, this is for you because you will see those options of modern news. This course is intended to work with modflow2005. I guess, yeah. The work procedure is really similar of what you will do in module six, okay. And for example, here we have, there is a summary of module news. If you are strongly recommend that you work on the 64 operating system, I don't know if any of you have a 32 operating system computer. However, in my experience, I see that there are more bugs on the 32 than on the 64, okay. Okay, great. So if you have it already, there are some material on the course that are the PDFs, and this is something great about those PDFs because we are going to work with the PDF. So we are not going to do anything that is outside the PDF, okay. And this is great because if you want to recreate or if you want to come back and see or do it by your own, and this is the topic of doing it by your own, it's really important because what happens on the course is that you, on the course everything is perfect. So everything is great. So you work very well, you do your model, the model compares, you get the results and so on and everybody's copy. But when you do by your own, you face a lot of challenge because models are not the same. So you have a model with another boundary condition, you have models with another challenge on the boundary conditions or in this presentation, so okay. So that's why you need to have like a guidance so say, okay, in the course what have we done in this step? Ah, okay, this is the step that we have done in the course. Okay, so I will open this and then, okay. So as we have said, model news actually works with all of these models, okay. And they're, well, you have already downloaded and you have already installed it, that's why you have, that's what you have told me and then we are going to open model news, okay. So here in your computer, look for model news. Actually it opens in the other computer, in the other screen, okay. So here I will open in model news and let's see. And then here this is what disappear, okay. After I press on this, and maybe you can have it on your desktop, I don't know, no, I don't have it on my desktop, okay. But if I type model news, actually it appears here, okay. Yeah, it appears here, okay. And then you have these options. If you are here with me type yes to, yes to please. Okay, great. So I will explain what is here, okay. What you can do, you can create a new mod flow model. You can create a completely new model, but you can also create a fast model. What is fast model? A fast model is a transport reaction model that implements another code that is called XT3D, I guess, for maybe you have to check. Plus frequency, okay. So it's a transport reaction. So this model, it will be required when you have, for example, a contaminant bloom and this contaminant bloom is actually degraded or the contaminant species are being speculated in another chemical compounds, okay. So when you want to deal with that, I will strongly recommend to do it fast, okay. So then we have sutra. What is sutra? Sutra is an old code as well from the USGS that create finite different, finite different model, okay. Finite element model, okay. So mod flow, okay, this is some kind of telenovela. Yeah, telenovela. Because mod flow was a finite different model, but it was telenovela 2005. In mod flow six, we have this triangular, we have the, we can do triangular discretization in mod flow and then we can do boronoi discretization in mod flow. Almost any discretization in mod flow, okay. That was possible in mod flow 2005, but now it's, but wait, but at the time that where you have of mod flow 2005, in mod flow, you can create grids like I mean regular rate of rows and columns. While with sutra, you can create triangular grids, okay. But now in mod flow six, you can also do triangular grids, okay. I hope that you are not get lost just, well, I want to give you as much information as possible, but also if you have any questions, I am, I am, I watch it, I watch the chat and so I can answer that in the spot. Okay, there's another topic of water well footprint. Well footprint is related of the capture area of wells. Richard Miston that is the developer of Modemuse has a tutorial of well footprint. Actually, I haven't done, I haven't done, I haven't worked in any, but if you see the tutorial of Richard Miston, so you just have to look. Yes, there are some videos on here on Modemuse videos. There is a new one in, well, it's not new, I'm well footprint, well, it's new from 2018, okay. So, okay, if you are learning it or if you want to do consulting or research or your master thesis or something, I will strongly recommend as well to see, to watch these videos, okay. Because these videos are really, really important if you want to know more about the software, I have watched almost all of them, okay. Almost all of them, just. Okay, so everybody create a new Modflow model and type next, okay. Okay, so if you are here, yeah. Here, this screen is almost how can I, how can we tell you, this screen is informative only. Okay, and then, and I hope that you are here with me because otherwise it can be like, very, okay. Let's talk about the special temporal topic of model with Modflow and Modemuse, okay. If you work in Modflow, Modflow actually do not care where the model is located because what Modflow will care is about the grid and the position of one object in the grid, okay. Right, this is the first thing that you have to remember, okay. So the model actually, for the model, a coordinate system is a coordinate system that can allow you to put any object in the grid, okay. Right, but however, what will happen if you, for example, have to do a repository of your model and then any person from here to five years have to know where the model is located, okay. Because for example, something happened and then a guy only found a file that say model one and then the guy say, oh, what is this model located? Okay, I don't know. I mean, it appears a basic, but I don't know where which basic refers to, okay. So that's why here you can put some metadata regarding to the system of projections or with this system of projections, a future user or like a colleague can locate exactly where your model is located. So it can work with EPSG on project or but you can type, for example, if here in Peru we are in two, this is our EPSG code, okay. 32718, so it means 32, that is WGS, UTM seven because we are in the south hemisphere and 18 because we are in the zone 18, yeah. But this is only the clarity. I mean, actually you are not required to do, during the simulation, this data won't be used in any part of the simulation or, yeah. This is just to provide the right metadata for right interoperability of the model, okay, great. If you are here with me, type the string. If you have any questions, you can drop your questions anytime as well, okay, great. So you say you can put, you can put, but as well this is only creative, so example of that's one, okay. There's something time as well, it's as well declarative, okay, and then you have the length units and the time units, okay. From all of these, these are the two that they will be used on your single numerical simulation. This only two will be used on the numerical simulation. You can work with meters or feet, yeah, since the code is done in the US, you can, they always have this imperial, I think system unit that they work with feet. For us, I will strongly recommend that you use meter, the international system where the unit of length is meter. And for time unit, you have seconds, minutes, days, and years. And this, I'm kind of more flexible here, why? Okay, okay, there is a good question from Naga that say, how do we know the projection code for a present location? This is great because you have to know your UTM and your system of projection, and I guess, well, it really depends on your, yeah, it really depends on your, on the country that you are. Maybe we can, later on we can provide you some links regarding that, okay. Okay, so, sometimes transmissivity is being reported in meters per day, okay. Or like a drought conductivity is reported in meters per day. That is great. I mean, however, I use meters per second. And it's really up to you to select which is your time unit. Because if you work with days, you will have, it will be easier to work like transit simulation over three years, five years, six years or because you will have a number of days or maybe even, you know, work with years. What is my recommendation? And please know that if you are taking notes that if you select any type of length unit and any time of time unit, you have to translate all your data to those units, okay. You have to translate all your data to those units. For example, you select the time unit. Today's all your transmissivity or your hydraulic conductivity has to be translated to this unit. Because I think later on there were some options to translate in modern news, but it's not that great quality practice, okay. So for me as a modeler, I always translate everything to the units that I have selected to do the model and then I start to do it in the model because later on you will have values and then you don't know if those values were, I mean you can get the value but you don't know which was the time unit or the main unit of that value, okay. But for example, if I work in meters and second, I know that all the parameters that I have are expressed in meters, second, square meters divided by second and so on, okay. So in this case, it's meters a second and as a mild bias, if you select, I'll lend you the time unit, translate all your information to those units, okay. Next, first, Ray, are we here? If we are here, type ES3, ES4, ES4, okay, Ray. Here we have, we are a modeler, modflow6, okay. Then we can also select the modflow 2005, we can also select the modflow in DVD, we can also select the modflow in the HM, we can also select CFP or LDR, okay. Let's have a review of what those mean. Okay, modflow6 is the latest version of modflow because it's the sixth version of modflow, okay. So modflow, the third version was on the 88, they become 96, then comes 2000, then it comes 2005, or maybe I'm missing some. Okay, so modflow6 is the latest version of modflow6. And some of the tools of modflow6 are available in model news because model news actually do not implement the unstructured unit yet, okay. Then we have modflow 2005, okay. Modflow 2005 is only on, it's only on various different methods. So I mean, in modflow 2005, you can create regular gates of row and columns like this one, okay. However, for example, what happens to me that if I wanted to do regional modeling, I mean on the scale of basic modeling, I will, on complex geometries, I will not reach the solution with modflow 2005 because the matrix was kind of very intense known diablo. They have a number because it was, the server will not have a solution for the model. That's why it came modflow in WT. Modflow in WT is a Newtonian solver, Newton-Raphson solver of the ground water flow that kind of is more flexible, is more flexible with complex geometries, is more flexible with dry cells. And it is, yeah, and we, I think that it is more flexible with great changes on hydraulic properties. So I mean, if you have a K of 10 to the minus five close to a K of 10 to the minus three, you have to order a magnitude from one cell to the other cell, and then sometimes modflow in WT, you can have better results, okay. Is remember that this is a solver, okay. And this is a solver, okay. And this is really a red solver. For example, when I do green modeling, I all, for me, and this is really for me, I use modflow in WT instead of modflow six because for me modflow in WT works better, okay. I reach better solutions and I reaches in this plan, okay. Then if you are planning dealing with, for example, if you have a basin that is under high stress and then you have a model that can diagnose the basin in real time, considering irrigation, pumping, transportation, losses on channels, and so I would strongly recommend to you that I will do each one water model, okay. That is a model that represents most of the, with higher complexity what happens on the, on a, as a value scale, okay. There are a few models actually done in this code, okay. For example, there are more done in this code for some stress aquifers in the US, okay. In Albuquerque in California, they have this model done and they have, sometimes they have this model connected to a website where in the website you can have the diagnose of the water levels and then you can apply some sustainable, some groundwater policies that say do not pump if you are under this level. So yeah, the concept is great and then you face some governability issues and you can do that with our UHM model, okay. Great. And then we have the CFP. The CFP model is related when you have to, when you need to work with fluid process. For example, okay, and what is the, what is the topic here? In mudflow, I mean in mudflow, in a numerical model, in a groundwater system like this, it is assumed that the flow is laminar, okay. So you have a flow alongside the spaces in the pores. I mean, in the spaces on the pore you have your groundwater flow, okay. But what will happen if you have a tunnel or what will happen if you have a characteristic conduit? Then if you have a tunnel or if you have a characteristic conduit, those flow there will be turbulent, okay. Because they might be turbulent because water will reach higher velocities, okay. So Darcy actually do not work with turbulent flow. Darcy work only for laminar flow. It's a, in fact, an approach on the laminar flow conditions. Okay, so if you want to work together with a tunnel or with a plastic conduit together with a groundwater flow, I will strongly recommend to use mudflow here, okay. And then if you want to do a local grid refinement, this can be done better in mudflow six, but if you want to do it with mudflow 2005, you can do this one, okay. If you are with, here with meantime, yes, fine. I think that some people have already gave their, the city where they are connecting, but I think that I miss them. So just, if you go over the chat, can see, can type the city where you're connecting. It would be nice to, yeah, let's do that. Let's type hello and the city where you're connecting so I can see how is hello in your native language. In your, let's type hello in your native language and the city where you're connected. So I can know more about your language and where you are from it, okay. So here, let's type 20 columns, 30 rows, no. 30 columns, 20 rows, two layers of 50 and 50. And this will be, and this will be clearly not blank. This will be called 100 and then we are going to have 40 meters of science or it will be 60. And it will be, we will come back to that. So let's see, let's see, let's see, let's see, let's see, let's see, let's see, and it will be, we will have 50, okay. Let's see, from Mitarawa, from Kalo, with Rotterdam, Kalo, from South Africa, whoa. I'm very sorry, I wish I lied, I can speak Arabic but I think there's something sensational I do not get. From Osaube, okay, Grenol, Tanzania, South Africa, wow. Great to give this, you are the most rich audience that I have, demographically rich audience that I have given any course. Okay, okay. And there is a great question from Amali that say, what is the set of criteria do you consider when specifying the initially great quest? For example, this is, this, I mean, when you define the grid, I mean, when you define the extension is mostly for the first models that you're going to do, so it's for a local model and so on. Later on, you have this no grid option, do not proceed, but later on when you see apply cases, you will use check files and the check files actually define the grid, okay? But for, since we are doing at the beginning, we only define the grid by ourself. Which is the criteria to define the grid? There is, this is a strong question, very interesting. Why? Because the size of the criteria is, kind of custom engineering, okay? For example, if you have a basin, somebody told you, somebody can tell you, oh, you have to model this on a grid of one meter parallel with you because that will bring you, that will bring you good resolution. And they say, okay, that's right. You can have your basin, on a grid of one meter by one meter. However, there is the computational, the computational, you have to take into account the computational resources, okay? The model views is not designed to work, for example, with grids of 1,000 columns and 1,000 rows, because actually the graphic user interface, and I have tried, will be all blocked, it will be all, how say, which is the work of that one? When you have it all together and very tight among each other, okay? Yeah, you will have it like this, okay? And for example, you cannot have infinite layers. Why? Because as well, you will have a model with a large number of cells, okay? So actually the grid cell size is defined, I mean, the grid cell size is defined in order that you have an adequate number of cells. For me, in my experience, a number of cells of 500,000, okay? We are doing a model, you have 500,000 cells, is, it's right, I mean, you don't, I mean, if you can do it with less cells, it's better. But if you have 500,000 cells, yep. Model news can work with that. You can work with one million cells, but then you will see that all the steps actually became to require lots of time. So the workflow is really slow, yeah? I have also worked with one million cells once, okay? But I won't try, and I won't do any model that will be higher than one million cells, and I don't even recommend to do any model that is above 500,000 cells, okay? The, there is a model that I was working with many cells, around 700,000 cells, but I haven't done that in model news. I haven't done that in flow by, and Python, and I was really aware of the resources, and I kept them, and I did it in Linux, okay? Because I wanted all the power to be dedicated to this process, okay? So I thought that this answered your question. Okay, so here, this is something good because you have to remember that in the medical modeling, and in that, and as for in other models, you don't define the layer thickness. The layer thickness is defined by the interface among the top of the layer and the bottom of the layer. So this is the top, this is model top, model top. It appears on, with the great background because model top is available in model news, okay? And it's model top with capital M and capital G, and under score, okay? Model top reflects the surface, and the surface in this case is 100 meter, and then it appears the bottom elevation of the first layer. The first layer for us will be sand, and this sand will be, the bottom elevation will be 60 meters. So then tell me on the chart which will be the thickness of the layer, okay? On the chart, please, which is the thickness of the layer? Okay, grade is 40. So you have 40 as the layer thickness, okay? Then we have the line, and the bottom of the line is 10, okay? So tell me which is the, if the bottom of the sand was 60, and if the bottom of the line layer is 10, and the sand is above the line layer, which is the thickness of our line layer? Okay, 50, great. So this is how you define the layer thickness by defining the top and the bottom, okay? Great. So with that, and this is to define the origin of the upper left corner. So, and what is the origin of the latter left corner? Because since this is a, this is not Cartesian, this is, so make this work, so make it. Everything starts from this point because rows, I mean rows, this is the first row, second row, third row, fourth row, and this is the column, first column, second column, third column. So actually you have to define this, this will be your zero, that is not the same as the your spatial zero, origin, because this is your spatial origin, but for the matrix, this is the row, this is the origin, okay? So in our case will be 1000, 1000, one kind, okay? If you are here with me, type finish and write on the chat, yes, six, okay? If you are here with me, press finish and type on the chat, yes, six. Okay, I have questions. Should we take layers from the ball hole or your technical data? Sure. Sure you can have, you can insert or your geological model and there are tutorials for that. Okay? But these are, how I say, if you are kind of doing the Tour de France, if you have not managed to learn how to write a bicycle, okay? Then Tahira asks, does a log helps here for the final? Yes, sure, sure. I mean, there are tutorials about how to implement geological models in multiple. Okay? But the procedure is much advanced and it's different for that, okay? This is a simple model where everybody has his first step in the medical model, okay? There is, what is the certificate? This is the size of the column and this is the cell size and we will see on the grid. And what if I area difference thickness for the sediment, okay? This as well, please, this is a very hypothetical model. Then there are, and then there are different steps where we can define varying layers of varying thickness or like anti-greeners and so on. And there is, and there is how do you go back? No, you cannot go back in this. So once you have finished, whether you open model user game, but there is no back here. This set is actually the same as surface. Actually, this set is not doing much on this operation. Okay? Can you use them? Yes, you can use them for surface elevation and there are tutorials on our blogs for that. However, in this case, the surface elevation is also. And yes, I have seen that this is buffering a little bit. Yeah, sometimes I mean due to the quarantine, our, due to the quarantine, our internet service were not the great, but now are not better. So, but okay, be patient. I will see if there is buffering or you can write. Okay, so finish. Okay, great. So here you have your model that has with this, with this one, with this one, we can join. And the model has 20 rows, 30 columns, and this is the aerial view of the model. And this is a cross section on this line. Okay, on this line. And this is a cross section on this line. I can do a zoom here. And if you are here with me, type yes, seven. If you are here with me, type yes, seven. So, okay, so the objective of this class was to show you some, some of the functionalities and workflow, and then we are going to talk about that. Okay, first of all, the line one. So the, here, this is the menu toolbar. Okay, so this is file, delete, delete, data, all of it, and so on, this is the menu toolbar. No, yeah, this is the main. And these are the tools toolbar. Okay, so here where you find the tools. This is the view from the top. This is the view from the right side, from the right side. And this is the tool, the view from front. Okay? And then here we have a 3D view. This 3D view is basic, yeah? And here you can add the view and a grid on the cross section. Okay? And then you can rotate it with your mouse. And then you can, with the right click and up and down, you can do zoom as well. Okay? Resolution is not the best, but it's really handy when you are dealing with, when you want to locate a boundary condition, so to see if something is there. Okay? Great, okay, so let's see. Okay, I will do here. Okay, we have palm with the hand. We can move the, our model and then we can move it away on the cross sections. So just try this, please, try this, please. You will see that this coordinate that we have defined as 1000, 1000 is actually this point. Okay? Right? And then you will see that some of the lines are more thick than the other ones. Okay? Do you see? Okay? Do you see that this line is more thick than the other ones? Okay? And what does it mean? When a line of the grid is more, is thicker than the other ones, that means that it's a multiple of 10. So that means that this is my first column, my second column, my third column, four, five, six, seven, eight, nine, 10 and then you have the peak. Okay? And then you have 10 and then you have the peak line. So instead, for example, if I, if somebody asked me, which of the number of columns of rows that they have, they say, okay, rows, 10 and then 20 rows and columns. 10, 10, 10 columns, okay? Okay. Great. And, okay, let's see. Let's go ahead. For example, here we are in the first layer, but we can go to the second layer, okay? With this, if I press here, I can go to the second layer and then I get to the first layer. Since this, the first layer and the second layer has the same geometry and gravity parameters, nothing will be seen. Okay? Here as well, you can do it with the cross sections. Here you will see some changes because if you press here, this, you will see actually the cross section in this alignment. Since the geometry is the same, it's nothing, but I mean, you will see the same cross section. But when you are dealing with regional modeling, actually there is a big difference on what you see at every cross section. Okay? Great. What else? Then we have the, this is the ruler and then we have another ruler here, okay? So here we have something that, for example, I can, I have say, which is my grid space, my set size is 50 by 50, so I can check this. So this is around 50, great. And this is around 50. So I can tell you that my grid that my, well, I have, now I can tell you that the same size is actually 50 by 50. Okay? Great. And then here you can see the coordinates. What else? And then I can do a zoom here with this one and then I can do a zoom out with this one. And then this is zoom window. With this I can do zoom there window and then I can do zoom out, okay? So zoom window, zoom in, zoom out, pan, and this is zoom to preview. So what does it mean? So if I have done a zoom here and I want to go to the latest zoom, this is my zoom preview, okay? All right, then there's a question here. Shouldn't the colors in the vertical views be opposite? I should have two cells in each and the regular. What? Shouldn't the colors in the vertical views? I mean, why? Okay. The green color means this cross section and the blue color means this cross section. Only denotes the, that only denotes where the cross section, what you are seeing on the cross cross section, okay? Great. Let's go and let's move. If you are, if you have followed my tutorial, okay, you should have this on your phone. If you have followed the tutorial of the installation, you have, you should have all you have, you have ended with C, here in AP, and then for example, here I have more for 2005, NWT, and some budget, okay? Maybe, for example, here I need the mod flow, what I will need is mod flow six, for example, okay? If you have this folder on your C drive, please type yes eight. If you have this very, very deep app folder inside your C drive, please type yes eight. Please type yes eight if you have this folder, because this folder is, if you have finished the tutorial, in other courses, when I ask, everybody has mod flow installed, and everybody tell me yes, because they have mod views installed, but this folder is actually the enginest that will run mod enginest, okay? If you don't have it, don't worry. There is the tutorial, but the tutorial go to the end of the tutorial, because in the end of the tutorial is where we are going to install it is. For example, I will do, I know that I don't have the WU app completed because I don't, here, in my case, I don't have the mod flow six, so I will do it, and for the people that has already done is a refresh, and for the other people, will be the extent that you will do after this class. So in model, everybody goes to model, and then goes to program locations, okay? So in model, everybody goes to model, mod flow, and mod flow program locations. Wow, yeah. My advice is to do the complete tutorial, please, okay? So the complete tutorial will be here on the course, to install tutorial, to install mod flow, mod enginest, and then appear my face, and I will drop this on the chat, and then you will see. The WU, WU-RD app folder, you have to create it by your own, and then you have to place the files there, okay? So see in the end of the tutorial, and then you will have a successful tutorial, okay? So here, for example, I don't have mod flow six, I do not have this, but I have here a link, so what I do is I have, I do double click here, double click here, and it will redirect me to the mod flow six website, and I say, okay, I want to download mod flow six for Microsoft Windows, okay, yes, yes, open this, and it will start downloading mod flow six, that is 6.11, that is released on the latest June, okay? Actually download it, and it's kind of, okay, we'll take some time, I can explain some things here. Okay, here it appears some of the mod flow options together with some other options for pre and post processing, okay? So here we have danger for mod flow six, we have here danger, for example here, I do have installed mod flow 2005, I do not have mod flow LGR, I do have mod flow NWT, I don't have mod flow CFP, I don't have mod flow RUHM, and for example, mod path, what is mod path? Mod path is a particle tracking model, okay? So, and this is coupled to mod flow, what does it mean? That if I have a groundwater model, and then I want to see which is the trajectory of any particle, this particle has to, mod path can simulate the trajectory, the path length of this particle, okay? Then you have some bucket, and what is some bucket? If you want to do a water analysis of a certain part of a certain boundary condition, so you can do it with defining a some bucket. Then you have this empty 3DMS and empty 3D USGS. What is this? This is a transfer model that is also coupled to mod flow. And empty 3DMS was done by the University of Alabama, year 2000, I guess, or maybe I can be wrong. And there is a latest version of the empty 3D USGS that is a code developed by the USGS that was released five years ago, I guess, okay? If you want to do some accessibility analysis or automatic parametrization, you can use model mate. And then the text editor by default is defined as the node path and the model monitor is this one. And this is a utility that will help us when you run the model, okay? So please tell me which, you have mod flow six installed on your computer. If you have mod flow six installed on your computer, please type yes nine, okay? Okay. Hans, are you there? Yes, I'm there. Hans, it will be, what was it, methodological or pedagogy to have a 10-minute pause here? Or like this, we go everything in a row. I mean, it's really up to you. How long do you still have to cover it? Because it was, or it was designed for one hour. Okay, I think you can better continue given that people have reserved the time now and they're bandwidths. Okay, okay, yep, yep. Okay, so let's continue. Okay, so because, yeah, I will continue with the next step, okay. So let's continue. I can install mod flow six later. Okay, so the objective of the second part is the learning the function of the basic tools. So here we have the five geometries available in mod flow, in mod news, okay? So this is the point, the line, the polygon, okay? This is the point, the line, and the polygon, point, line, and polygon. However, you have these two options that are really close. This is a straight line and a straight polygon, okay? So what does it mean that if you do a polygon or a line, for example, I will do, okay? I will do, then you will say, I will do a line. Because this is more to show you. Okay, what's going on? Okay, I will do a line. This is a normal line that you can define anywhere else, okay? But however, if I select this, I can do a line but only parallel to the, okay? I can do only parallel to the axis, okay? To x axis and y axis, okay? So this is the, this is a line, but this is a line that can be only parallel to the x axis and to y axis, okay? So this is the line, okay? Great. And this straight polygon is also a polygon that can be only parallel and it has to be square, yeah? Okay, so this is the difference between these two. So actually those are special conditions of the point, line, and polygon, okay? Great. So we have, we are going to make, I mean, if you are going to select a river, you can do it with lines or polio, for example. If you are going to create a well, you have to do it with points. If you want to create a poli line, you can do it with, if you want to represent a river, it will be a poli line. And if you want to select a wetland, you can do it with polio, okay? So this will be mostly related to river, for two points. This will be mostly related to streams and the other ones will be related to wetlands or to protection zones or will be related to contaminant sources as well, okay? This, I mean, we are new as a modeler, you have many tools, and then you can use the tools in this way, but you can also select the only use for the tool. I mean, there is no, I mean, the software allows you to do that. Okay. So let's create a new line, a new point. So let's create a new point, select this one, and press anywhere in your model, okay? And then this window will appear. So if you have, if you are here with me, type yes 10. If you are here with me, type yes 10. Let's have a look on the different, let's have a look on the different conditions here, because it can be that for you, you have some different names here, but there is no problem, yeah? But please have a look, and then we are going to review onto there. Okay, so here, this is the name, the name is actually alias, so we can type well, for example, okay, great. Then what else? Then we have the object order. For example, for me is the first object order. If you have done any object before, and then you have deleted, actually, you have a, you can have this object order, actually is the index of all the objects that are on the model. So in this case, we only have one, so it will be one. You can change the color line, why not? Why not change it? Because by default, it's black, and if you leave it in black, actually can be confused with it. That's why I always change, okay? So let's see. And then, for example, you can define as quadtree refinement, okay? And this is something that the world is playing right now, okay? So if you are here with me, yeah, type yes, 11. If you are here with me, type yes, 11. Okay. We are, yeah. Yeah, I have seen that the course content was decided for one hour. And we are going to do 15, and then we have already over this one hour, but we are going to do 15 minutes more. And if Hans is not correct, give me your approval. Fine for me, so. Yeah, okay. Because I don't want that anybody has to leave this course and be missing something for the other. Okay? And as I told you in the organization, this link will be available for you to review afterwards, okay? So let's talk about the number of set formats, okay? So here we have zero, one, and two, and what does it mean? Okay? There are some objects that are not related to elevation. So what, which are the objects that are not related to elevation? For example, the evapotranspiration that we charge is not related to elevation, it's related to the model itself, okay? So if you want to define a special object that is not related to any elevation, you type to press this in zero. Yeah? But if you want to define, for example, a well-screened or, for example, a river location, you have to relate it to one elevation because the river is located at one elevation, okay? But for example, if you want to define this as, for example, if you have a drilling log and in the drilling log you have certain material from one elevation to the other elevation, you can define this as two formulas, okay? So this is how it works. These formulas define the set direction of your object, okay? In this case, we are going to define that since this will be a well, our well will be located 10 meters below surface, okay? So it will be model top minus 10, okay? Let's see, I just type model top minus 10 because my model top is 100 minus 10 will be 90 or I can type as well 90, it's the same, yep? So, but I will say model top minus 10. If you are going to work with model top, yes, remember there has to be model with capital M, underscore and capital T, okay? Great. So with that, we have our, and this is the quarterly refinement, the quarterly refinement is actually not being used here because I will tell you where the quarterly refinement is being used, okay? So far, we are only going to define the object, so I just type, okay? And then if I go here to data, not to be, if I switch to discretized by vertex, okay, if I switch to discretized by vertex, here they are in discretized by vertex that we are not going to do, but there are tutorials on that, we can achieve to, we can do quarterly refinements, okay? That is a type of local discretization in model top, okay? But we are not going to do that, okay? So, okay, so here we have our well and then we are going to be a river. With this, we create a river that crosses, yeah? The river crosses the model and actually, as you can see here, is crossing the model, okay? And then I do double click, I do double click here and this will be my river and change column, okay? And then I just type one formula and for me, my river is model top minus two, okay? Model top minus two, okay? So this will be a river and this will be model top minus two. There is an option here that is position log. And what is this option? Okay, imagine that you have imported your river net, okay? We are going to do, we are going to see that later where you can import a river net. But imagine that you have imported a river net, okay? This river network actually is referred to a specific place. You don't need, you don't need, for example, if I compress position log, I can change the location of the river because for me, like I said, okay, maybe the river that was like that. But if you import a river network, you don't need this option to be available because you know that the river network is there, okay? So for example, if we want, we don't want that this river network, if we want that this river network won't be changed, no matter what you do, we press here position log, okay? Yeah, this is more for the quality of your simulations because you can create and you have the, you can be sure that the object that you have imported are there, I mean are in the required position. Okay, so far, that's it. And if you have a line, actually the object length will appear here, okay? And this is my second object, so the object order will be different. And that's it, okay? Okay. And then I will create a polygon. And with this, I can create a polygon that is represented as a contaminant source or something like that, I can create. To finish, I do WP and then this is the wetland for example, okay? I can change color, I can change the color of the outer part, but and these visualization options or more news are really, really scarce, but there is an option here to define the inside quality, things, the color of the polygon, okay? And this one will be three meters below surface, so it will be a nine meters below surface. Okay? And this is, this won't be positional because there are options as well to change the, there are options as well to change the position of the points, okay? And then here, since you are working with them, since you are working with the, with the polygon you have an area here, okay? Okay, everybody, is everybody here please? Yes, 12? Okay, since this one is not positional log, I can do this, for example, yeah. Imagine that I can select it, I can select it, but I can move it, I can move it, okay? And maybe this is, I mean, sometimes this can be required and sometimes this cannot be required on your groundwater model because you know easily what is your groundwater, what is your objective, okay? But there are other options here, for example, I can move the vertex, I can select the vertex here and I can select the vertex here, okay? And I can select the vertex here as well and here, okay? I can do the smaller bits on the spot instead of, for example, going back to GIS and bringing back the, I'm bringing back the object and doing the bits here, I can do the bits right on both of these, okay? Great, so with this, for example, I don't know, for example, I want to see if the river is positional log, I want to see if the river is positional log, I do double click with the red arrow, I select, when you know that it's selected because the vertex will appear and then you do double click here and this appears here and they say, ah, it's positional log, so actually I cannot change this, okay? So far, this will be everything for today and then you were really, are really, how to say? Very mixed and very rich group of attendees and I'm really happy to have you provided this course. This class, see you on Friday. There is a question of, for Fania another say the river and everything is on the first layer because actually it's, the objects are defined on the layer that intersect the objects since all of these are located on the first layer, everything is located on the first layer. Okay, well, in my language, stay much as gracias and Hans, I leave you to say goodbye of this class. Yeah, so thank you very much. Maybe you'll want to share your face also to say goodbye to the attendees. Let me, very grateful that you give these free sessions, basically donated to the OpenCourser platform of IHE Delft. So looking very much forward to the next session, I'm learning also a lot from you as a more in the service. I now dive into the groundwater with you. Just to take the opportunity, I would like to share some other free stuff that is coming up this week already. So I'm going to share my screen in one moment. So if you go to the IHE Delft website, then find here a link to a webinar on QGIS for preparing and visualizing hydrological data. Already more than 1,000 people have registered. So you can join it for free. It's organized by the Australian Water School and Kurt Menke, the co-author of our book, Will Be Speaking and we'll have Saber Rajmui, who is also working a lot with this company on the link between hydrological models and GIS. And there's Craig Price, who knows a lot about HecRus modeling. So definitely nice to join this session. And after the free webinar, you can also register for online courses. Those are paid. Another thing that I want to point out is that our September short courses are now offered online. So maybe you want to check it out. They are not free. We need a balance between, of course, what is free and what is not. But if you want to have a certificate, an official QGIS certificate, for example, and support by Kurt Menke and myself, you can join this course now from 14 to 18 September. Sol, you want to share something? Yes. Well, if you follow me by LinkedIn, you will see that I was very active in Boronoi Greece. And I don't know if you are really interested in that. We have an in-learning platform. We have in Spanish as well. We have an in-learning platform in Spanish where we have some kind of the diploma that is a joint of many... I will share my screen, Sol. Where we have some diplomas that are the group of many courses in American modeling. And on next year, they will be the first that we are going to provide in English. And this is related for some people that want to do like comprehensive or like they want to have a level where they can do a master thesis or like working in American modeling. In English, we have in the diploma in English will be next year, but in Spanish, we have been doing like this is the form. And there we in English, we have online courses in modeling with workflow and more news. This was a course that was even recently. And there will be a course on workflow and flow pipe soon coming. And there are some webinars or calibration, sensitivity analysis and so on. If you are interested, you can, for example, this one is free, so you can create your account and enter this. This one is free as well. This one is paid because you see him because you pay through PayPal. Okay, so as well as Hans has said, there is this equilibrium of what is free and what is paid, but just to remind you that everything that we do, we do it because we love what we do and we do with the passion of to our process world. You will see that if you take that. Okay. That's a bit true, Sol. Great. Okay, I wish everybody a great day, morning, evening, night, wherever you are in the world. For me, it's almost dinner time. Hope to see you all next time and learn a lot more from Sol. In the meantime, check out the OpenCourser platform and do those classes. So you are at the right point when we have our next live sessions. Thank you all. Bye-bye. See you. See you. Ciao.