Distributed simulation of basin water cycle under changing environment

Nowadays, great efforts have been made on distributed hydrological modeling. It is believed that, distributed hydrological model can describe the hydrological processes in more detail and more physically. On the other hand, the rapid development of computer and information technology has turned distributed hydrological model from scientific concepts to application reality. HydroInformatic Modeling System (HIMS), an integrated water cycle simulation system, mainly consists of distributed hydrological model and can customize and develop one new hydrological model adapted to an actual basin. This study has coupled self-developed runoff model by HIMS with LiLan-II (LL-II) model and then customized one distributed hydrological model suited for Wudinghe River basin, which is the biggest branch located between Hekou Town and Longmen in the middle reach of Yellow River. As for integrated water resources management, the customized distributed hydrological model has integrated surface water with ground water and continuously simulated basin hydrological processes from 1980 to 2000. Additionally, it has considered both natural water cycle and anthropogenic impacts on water cycle. Computation results show that the customized hydrological model can simulate water cycle process for Wudinghe River basin, China