基于SWAT模型的阿什河流域径流模拟适用性研究

Applicability of Runoff Simulation in Ashihe Basin Based on SWAT Model

以阿什河流域为研究区,在GIS技术支持下,应用SWAT模型进行了流域径流模拟。利用SWAT-CUP,采用阿城水文站1996年—2005年连续10年的实测月均径流数据对模型进行了校准;采用2006年—2010年连续5年的实测月均径流数据对模型的适用性进行了验证。采用相对误差(RE)、决定系数(R2)以及Nash-Sutcliffe效率系数(ENS)作为模型适用性的评价系数,验证期RE、R2及ENS分别为22.14%、0.91和0.86。结果表明,SWAT模型对流域长期连续径流模拟具有较好的适用性,具有一定的推广意义。

Ashihe Basin was selected as the study area to validate Soil and Water Assessment Tool （SWAT） model under the support of GIS technology. Monthly runoff data from 1996 to 2005 was used to calibrate SWAT model via SWAT-CUP. After the calibration, monthly runoff data from 2006 to 2010 was used to validate SWAT model. Relative Error （RE）, Determination Coefficient （R^2） and Nash-Sutcliffe Efficiency （ ENS ） were used to evaluate the applicability of SWAT model. The values of RE, R2^ and ENs reached 22.14%, 0.91 and 0.86 respectively. The results showed that SWAT model could be successfully used to model long-term continuous runoff in the study area, and the simulation has a certain signifi- cance to be promoted.