利用区域流量历时曲线模拟东江流域无资料地区的日径流过程

根据流量值与流域空间特征值之间的相关关系来构建区域化流量历时曲线，以流量历时曲线取代常规的流量过程作为流域降雨径流模型参数优化的目标函数，分析该方法的可行性与模拟精度。由东江流域中的11个子流域所组成的研究区域能得到精度良好的区域化流量历时曲线，以TOPMODEL模型作为流域降雨径流模型，用区域化流量历时曲线作为优化目标函数，验证流域星丰和岳城的计算结果表明该方法是可行的，能得到较为满意的模拟精度，可以将该方法应用于广大的无资料地区推求日径流过程。

Daily flow hydrograph simulation using regional flow duration curves for ungauged region of Dongjiang basin

Regional flow duration curves are generated by using the relation of discharge and watershed characteristics. In traditional procedures of rainfall runoff model calibration, an observed stream flow hydrograph is ordinarily adapted as the objective function for model calibration. The feasibility and simulation precision of the method are deeply analyzed. The regional flow duration curves are developed by the study region made of the 11 catchments, and the calculation results are satisfactory. The flow duration curves are utilized as a new objective function for TOPMODEL model parameter calibration. The calculation results of Xingfeng and Yuecheng catchment show that the method is feasible, and it may obtain the satisfying simulation precision. The method may be applied in daily flow hydrograph simulation for other ungauged region.