 This study investigated the impacts of urbanization on the hydrology of the Huangtakeo drainage basin in Jinan City, China. It found that urbanization had a significant amplifying effect on the design flood processes, particularly for larger floods with smaller frequencies. This suggests that urbanization should be taken into account when planning flood mitigation measures and constructing a sponge city in Jinan City. This article was authored by Yan Junzhao, Jun Xia, Zongshu Su, and others.