Open AccessDistributed rainfall‐runoff simulation for an unclosed river basin with complex river system: a case study of lower reach of the W ei R iver, C hina
Author(s) -
Peng D.,
Xu Z.,
Qiu L.,
Zhao W.
Publication year - 2016
Publication title -
journal of flood risk management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.049
H-Index - 36
ISSN - 1753-318X
DOI - 10.1111/jfr3.12121
Subject(s) - tributary , streamflow , inflow , hydrology (agriculture) , surface runoff , environmental science , drainage basin , structural basin , geology , geomorphology , geography , ecology , oceanography , cartography , geotechnical engineering , biology
As the largest tributary of Y ellow River and the ‘ M other River’ of G uanzhong Plain in S haanxi Province, W ei R iver plays a great role in the development of W est C hina. The lower reach of W ei R iver is the key economic district of this region. In this study, TOPMODEL with infiltration excess runoff was modified and applied to simulate inflow process between the X ianyang and H uaxian (outlet of the study area) hydrological stations for an unclosed river basin with a complex river system as well as ungauged tributaries. At the Q induzhen and M uduwang hydrological stations, the N ash‐ S utcliffe efficiencies were between 0.70 and 0.84, and the relative errors were between −2% and 12%. Integrated with the observed streamflow in J ing River and S hichuan River and the segmented M uskingum flow routing method, streamflow at H uaxian was simulated. Comparison of the simulation results with and without the south inflow showed that the simulated streamflow at L intong hydrological station with the south inflow between X ianyang and L intong was closer to the observed streamflow than the one without the south inflow. However, the difference between the simulated streamflow at H uaxian with and without the south inflow was insignificant. This demonstrates that the streamflow simulation at L intong is important for simulating flows in the study area with reliability.