系统微分响应参数率定方法在建阳流域SWAT模型中的应用

利用基于系统微分响应理论的参数率定方法率定闽江建阳流域SWAT模型，通过流域1992—2000年日资料验证了该方法的实际应用效果，采用纳什效率系数(NSE)、偏差百分比(PBIAS)和相关系数r作为评价指标对率定后的SWAT模型模拟精度进行评价，并与传统利用SUFI-2方法率定得到的SWAT模型模拟结果进行对比分析。结果表明：系统微分响应方法率定的参数在建阳流域的日径流模拟中表现较好，率定期和检验期NSE均为0.65以上，径流量PBIAS在5%以内，r在0.65以上；利用系统微分响应率定参数方法率定SWAT模型参数在实际应用中可行，且效率与精度均高于传统的SUFI-2方法。

Application of system differential response parameter calibration method in SWAT model of Jianyang Basin

The SWAT model of Jianyang Basin of Minjiang River is calibrated by the parameter calibration method based on the system differential response theory. The actual application effect of this method is verified by the daily data of the basin from 1992 to 2000. Nash-Sutcliffe efficiency coefficient (NSE), percent bias (PBIAS) and correlation coefficient (r) are used as evaluation indicators to evaluate the simulation accuracy of SWAT model after calibration, and compared with the simulation results of SWAT model obtained by traditional calibration using SUFI-2 method. The results show that the parameters calibrated by the system differential response method perform well in the daily runoff simulation of Jianyang Basin, with NSE of more than 0.65, PBIAS of runoff within 5%, and r of more than 0.65 in the calibration and validation periods. It is feasible to use the system differential response parameter calibration method to determine the parameters of SWAT model in practical application, and the efficiency and accuracy are higher than the traditional SUFI-2 method.