On July 14, WASER Council Member Prof. Junke Guo from the University of Nebraska-Lincoln visited the International Research and Training Center on Erosion and Sedimentation (IRTCES), and was invited to give a seminar on the "General Unit Hydrograph Model" at the China Institute of Water Resources and Hydropower Research (IWHR). Prof. Guo is the hosting chair of the 16^th International Symposium on River Sedimentation (ISRS) which is sponsored by IRTCES and WASER. Prof. Guo discussed some details about the preparation work of the 16^th ISRS with WASER Secretariat members.

At the seminar, Prof. Guo first introduced how he created the general unit hydrograph (UH) model, inspired by the COVID-19 data and in terms of scientific method (induction) and the linear hydrologic systems theory (deduction). He next demonstrated how to apply the general UH model in real-world watershed processes. Prof. Guo then tested the general UH model with LiQin Qu’s laboratory watershed data from a Chinese Academy of Sciences Laboratory and the Istanbul Technical University in Turkey; after that, Prof. Guo discussed how to apply the general UH model in small watershed design. Finally, he briefed the applications of the general UH model in marathon finish time distributions and other fields.

After his presentation, Prof. Guo and the participants had a lively discussion on the calibration of watershed parameters in the General Unit Hydrograph Model, the spatial scale of the application, the prospects of the model in the fields of sedimentation and reservoir scheduling, as well as the insights from research work.