GR模型与新安江模型及两参数月水量平衡模型在赣江流域的降雨径流模拟比较

Comparison of GR model,Xin'anjiang model,and WBM-DP model in rainfall-runoff simulation in Gangjiang River Basin

针对赣江全流域及18个子流域,在日和月时间尺度上分别进行GR模型与三水源新安江模型、两参数月水量平衡模型的比较。结果表明:在所选择的研究流域,GR模型在率定期和检验期的确定性系数达到0.85以上,径流总量相对误差在±10%以内;GR日模型的精度略高于新安江模型,具有更强的稳定性,且结构简易,参数不确定性较低;GR月模型的精度及模型复杂性与两参数月水量平衡模型相当。

A comparative study was conducted on the Mode ＆#39; le du ge ＆#39; nie rural （ GR ） model, the Xin ’ anjiang （ XAJ） model, and a water balance model with double parameters （ WBM-DP） at daily and monthly time-scales in the Ganjiang River Basin and 18 sub-catchments. The results show that, in the study areas, the coefficient of determination of the GR model exceeded 0. 85 and the relative error of the total runoff volume was within ±10%during the calibration and validation periods. At the daily time-scale, the GR model had slightly higher accuracy than the XAJ model, and it had greater stability, a simpler structure, and less uncertainty with regard to parameters. At the monthly time-scale, the accuracy and complexity of the GR model were consistent with those of the WBM-DP model.