基于SWAT模型的宝库河流域日径流模拟

SWAT model based daily runoff simulation for Baokuhe River Basin

根据西宁市宝库河流域土地利用、土壤类型及气候特征建立了适合于该区的SWAT分布式流域水文模型,并参考月过程的参数率定结果对日过程进行模型校准和验证。结果表明:基于SWAT模型的日径流模拟在该流域得到了成功运用,其中模拟的相对误差R e为16.9%,Nash-Suttclife系数E ns为0.76,相关系数r2为0.72,为后续模拟该流域鱼类产卵期的流量脉冲过程提供了数据支撑。

In accordance with the land use,soil type and climate feature of Baokuhe River Basin of Xining,a SWAT distributed hydrological model suitable for that region is established,and then the daily runoff process is calibrated and verified with the reference of the parameter calibrating data of the monthly runoff process therein.The result shows that the SWAT based daily runoff simulation is successfully applied to the river basin,in which the relative error（Re） is 16.9％,Nash-Suttclife coefficient（Ens）is 0.76 and correlation coefficient（r2） is 0.72,thus provides a data support for the successive simulation to be made on the flow pulse process during the fish-spawning period of Baokuhe River Basin.