基于新安江水文模型的东江流域枯水径流模拟

Low Flow Simulation of the Dongjiang Basin Based on Xinanjiang Watershed Hydrological Model

为了探讨新安江流域水文模型模拟流域枯水径流的可行性及精度,采用该模型对东江流域中的4个子流域进行日径流过程模拟.在采用常规的评价指标对模拟结果进行初步分析的基础上,以描述枯水径流特点的枯水特征值,例如连续多日最小平均流量、基流分割结果、枯水期模拟结果和流量历时曲线等为研究对象,探讨该模型模拟枯水径流的能力.4个子流域的研究结果表明,不论对于常规的评价指标,还是枯水特征值,用新安江流域水文模型来模拟枯水期的流量均能达到较高的精度,因此可采用该模型进行东江流域枯水径流的预测.

The daily flow hydrographs of the four catchments in the Dongjiang basin are simulated based on the Xinanjiang watershed hydrological model, with the aim of revealing the feasibility and precision of the low flow simulation using the Xinanjiang watershed hydrological model. The simulated results are then approximately analyzed in terms of the conventional evaluating items. Moreover, the ability of the model to simulate the low flow is assessed by investigating several low flow characteristic parameters, such as the minimum average flow at different intervals, the baseflow separation results, the simulated results in the low flow period and the flow duration curves. The results of the four catchments indicate that the Xinanjiang watershed hydrological model can effectively evaluate the low flow of the Dongjiang basin concerning the conventional items and the low flow criteria because of its high precision.