基于辽西地区降雨径流非线性扰动响应评估

Nonlinear disturbance response assessment based on rainfall runoff in western Liaoning

根据SLM模型对辽西4个区域的降水径流非线性扰动响应进行模拟分析,结果表明:辽西4个典型干旱半干旱区域降水径流非线性显著,降水变化率在-3.3%~14.2%,径流变化率在-15.1%^-65.8%,径流的非线性变化逐年增强。线性模型下各典型区域NSE和R2的评估值均低于0.6,故采用非线性模型对辽西干旱半干旱区域降水径流进行模拟。

According to the SLM model of the 4 regional rainfall runoff nonlinear disturbance response simulation analysis results show that since 70 s, 4 typical drought in semi-arid area rainfall runoff nonlinear significantly, precipitation change rate in-3.3%~14.2%, the runoff change rate in-15.1% ^-65.8%, the nonlinear variation of runoff is increasing year by year. Under the linear model, the evaluation values of NSE and R2 in the typical regions are less than 0.6, so the nonlinear model is used to simulate the precipitation and runoff in arid and semi-arid regions of western Liaoning.