CMADS降水数据在温带东亚季风气候区水库控制流域适用性--以潮白河、东洋河流域为例

Applicability of CMADS Precipitation Data in Reservoir Control Basin of Temperate East Asian Monsoon Climate Region: A Case Study of Chaobai River and Dongyang River Basin

为探究中国气象同化驱动数据集(CMADS)降水数据在温带东亚季风气候区水库控制流域情景下水文模拟中的适用性,选择SWAT(soil and water assessment tool)模型为研究工具,分别以CMADS降水数据与年鉴实测降水数据为模型输入项,以水文站实测月径流资料对模型模拟结果进行参数率定及验证,对潮白河流域有水库、无水库控制情形下水文径流进行模拟,并对东洋河流域有水库控制情形下以CMADS降水数据作为模型输入项进行了水文径流模拟。结果表明:在潮白河流域无水库控制的支流潮河水系,CMADS降水数据和实测降水数据支撑下的模型在率定期R2(决定系数)分别为0.64、0.83,ENS(纳什系数)分别为0.64、0.83,验证期模型R2分别为0.61、0.83,ENS分别为0.58、0.60;在潮白河流域有水库控制的支流白河水系,CMADS降水数据和实测降水数据支撑下的模型在率定期R2分别为0.89、0.87,ENS分别为0.87、0.86,验证期模型R2分别为0.61、0.67,ENS分别为0.61、0.65;在东洋河有水库控制流域,CMADS降水数据支撑的模型率定期R2=0.84,ENS=0.78,验证期R2=0.87,ENS=0.85。说明CMADS降水数据在有水库、无水库控制流域情景下的水文模拟中均具有较好的适用性。因此CMADS降水数据可以用于温带东亚季风气候区水库控制流域水文模型的建立。

In order to explore the applicability of CMADS precipitation data in the hydrological simulation of reservoir-controlled watersheds in the temperate East Asian monsoon climate zone, the SWAT model was selected as the simulation tool, the CMADS precipitation data and the hydrological yearbook measured precipitation data were used as the model input, and the measured runoff was used to calibrate and verify the parameters of the model. The hydrological runoff was simulated with and without reservoir control in the Chaobai River basin, and the CMADS precipitation data was used as the model input for the hydrological runoff simulation in the Dongyang River basin with reservoir control. The result showed that in the Chaobai River over the period of calibration, the coefficients of determination of the two models were 0.64 and 0.83 with the Nash-Sutcliffe of 0.64 and 0.83, respectively;At the verification stage, the coefficients of determination were 0.61 and 0.83, with the Nash-Sutcliffe of 0.58 and 0.60, respectively. The CMADS precipitation data has applicability in the scenarios without reservoir control in the temperate East Asian monsoon climate zone. In the reservoir-controlled Bai River system, the coefficients of determination of the model under the support of the CMADS precipitation data and the measured precipitation data were 0.89 and 0.87, with the Nash-Sutcliffe of 0.87 and 0.86, respectively;at the verification stage, the coefficients of determination were 0.61 and 0.67, with the Nash-Sutcliffe of 0.61 and 0.65, respectively. The coefficient of determination of the control basin model rate of the Dongyang River reservoir supported by CMADS precipitation data was 0.84, and the Nash-Sutcliffe was 0.78;While the coefficient of determination at the verification stage was 0.87, and the Nash-Sutcliffe was 0.78. It shows that the CMADS precipitation data has good applicability in hydrological simulations of watershed scenarios with and without reservoir control. Therefore, the CMADS precipitation data can be used to establish a hydrological model of the reservoir controlled watershed in the temperate East Asian monsoon climate zone.