DAILY FLOW ESTIMATION AT UNGAUGED REGIONS BASED ON REGIONAL FLOW DURATION CURVES
For the ungauged regions where many water resources projects are located, the daily flow hydrographs are normally required but unavailable. Hence, the regional flow duration curve must be generated using their relations to the underlying surface characteristics of watershed. In traditional procedures of rainfall-runoff model calibration, a fit of the observed flow hydrographs normally is selected as the objective function for the model parameter optimization. In this paper, the fit of the flow duration curve is replaced as the new objective function of model calibration. The feasibility and simulation efficiency of the proposed method are analyzed. The regional flow duration curves are developed on eleven catchments, with the fit of the flow duration curve utilized as a new objective function of the Xinanjiang model parameter calibration, and the simulation efficiency is very high. The calculation results on the two verification catchments have shown that the method is feasible. Because of its high simulation efficiency, the proposed method may be applied in daily flow hydrograph estimation at ungauged regions.
flow duration curve Xinanjiang hydrological model Dongjiang Basin rainfall-runoff simulation ungauged regions
Guoru Huang Chuanbo Zhu
School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 5106 Bureau of Hydrology, Ministry of Water Resources, Beijing 100053,China
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
50-54
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）