摘要
应用流域分布式水文模型SWAT,综合利用泰森多边形法、土壤粒径的线性变换、土地利用编码的转换等方法以及子流域和水文响应单元(HRU)的适当划分,对闽东南沿海西溪流域1970～1975年的年、月径流进行模拟,以月径流模拟的效率系数、相对误差和相关系数3个指标为标准,对模型的敏感参数进行率定,并对1976～1979年的月径流进行验证模拟.研究结果表明该模型适用于晋江西溪流域的径流模拟,且精度较高,尤其是降水量大,产流量多的月份模拟效率更高.
Simulated with the distributed SWAT （Soil and Water Assessment Tool） model, the methods of Thiessen polygonal method, the conversion of soil texture by linear interpolation, the adjusting and classification of land use/cover are used to conduct the input data. The Xixi watershed is delineated into 22 subbasins and 183 hydrologic response units. The model is calibrated with the measured monthly flow data of 1970 - 1975. In the process of calibration, six sensitive parameters including CN2, SOL_AWC, ESCO, etc. are determined. The simulation results are estimated by Ens, RE and R^2. The model is further validated with the monthly flow data of 1976 - 1979, which suggests excellent results. It shows that SWAT model could be successfully used to model the runoff in the Jinjiang basin and the model performs better in the months of abundant flow than in those with low flow.
出处
《亚热带资源与环境学报》
2007年第1期28-33,共6页
Journal of Subtropical Resources and Environment
基金
福建省重点学科建设项目
福建省科技计划项目(K0919)
关键词
SWAT
径流模拟
降水时间分配
晋江西溪流域
SWAT
runoff simulation
uncertainty in temporal distribution of rainfall
Xixi watershed
