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Assessment on the function of reservoirs for flood control during typhoon seasons based on a distributed hydrological model
Author(s) -
Wang Guoqiang,
Xu Zongxue
Publication year - 2011
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/hyp.8023
Subject(s) - typhoon , hydrograph , flood forecasting , flood myth , environmental science , hydrology (agriculture) , 100 year flood , drainage basin , flood control , hydrological modelling , surface runoff , runoff model , structural basin , weather radar , radar , meteorology , climatology , geology , geography , computer science , geomorphology , ecology , telecommunications , geotechnical engineering , cartography , archaeology , biology
Abstract A grid‐based distributed hydrological model, PDTank model, is used to simulate hydrological processes in the upper Tone River catchment. The Tone River catchment often suffers from heavy rainfall events during the typhoon seasons. The reservoirs located in the catchment play an important role in flood regulation. Through the coupling of the PDTank model and a reservoir module that combines the storage function and operation function, the PDTank model is used for flood forecasting in this study. By comparing the hydrographs simulated using gauging and radar rainfall data, it is found that the spatial variability of rainfall is an important factor for flood simulation and the accuracy of the hydrographs simulated using radar rainfall data is slightly improved. The simulation of the typhoon flood event numbered No. 9 shows that the reservoirs in the catchment attenuate the peak flood discharge by 423·3 m 3 /s and validates the potential applicability of the distributed hydrological model on the assessment of function of reservoirs for flood control during typhoon seasons. Copyright © 2011 John Wiley & Sons, Ltd.