改进的新安江模型在贵州印江河流域的适用性及对比分析

将变动态存储系数法引入新安江模型河道洪水演算,从而对新安江模型进行改进,基于贵州印江河流域印江水文站2000-2010年水文资料,分析了改进新安江模型在研究流域的适用性并和传统新安江模型模拟结果进行对比分析,基于改进新安江模型,定量分析不同计算时段和不同蒸发输入对水文模拟的影响。研究结果表明:改进的新安江模型适合于研究流域的水文模拟,相比于传统新安江模型,改进新安江模型在相对误差和确定性系数两个指标中都有所提高,其中相对误差均值减少1.08%,确定性系数均值提高0.0182;计算时段越短,次洪模拟精度越高;相比于实测蒸发皿,双源蒸散发作为蒸发输入模拟的年径流深相对误差平均减少0.75%,确定性系数平均提高0.0139。研究成果可以为印江河流域的水文模拟提供参考价值。

Applicability and comparative analysis of improved Xinanjiang model in Yinjiang River basin of Guizhou province

The dynamic storage coefficient method was used in river flood routing of Xinanjiang model so as to improve the model.Based on the hydrological data of Yingjiang hydrological station in the Yingjiang River basin from 2000 to 2010,the paper analyzed the applicability of improved Xinanjiang model,and compared the result of the model with that of traditional.It used the improved model to analyzed the impact of different calculation steps and evaporation inputs on hydrology simulation. Result showed that the improved Xinanjiang model is suitable for the runoff simulation in the research watershed. Compared with the traditional Xinanjiang model,the relative error and uncertainty factor of the improved model can be improved, the relative error decreased by 1.08%,the uncertainty factor increased by 0.0182;the shorter the computing time,the higher the simulation precision;Comparing with the measured evaporation pan, the relative error of year runoff depth of dual-source evapotranspiration reduced 0.8%, and the uncertainty factor of that increased 0.0139 respectively.The result can provide a reference for the hydrology simulation of Yingjiang River basin.