摘要
为满足北江飞来峡流域非点源污染负荷核算需要,利用SWAT模型对研究区1969-2011年日径流过程进行模拟。基于飞来峡流域水文、气象、地形、土地利用和土壤类型等资料构建SWAT径流模型,并运用SWAT-CUP中的SUFI-2方法对模型中的14个径流参数进行敏感性分析及参数率定,再进行径流模拟效果定量评价。结果表明:对径流过程有显著影响的参数主要为SCS径流曲线系数、主河道曼宁系数、地下水滞后系数以及地表径流滞后时间等;日径流率定期和验证期的效率系数均为0.83,相对误差分别为1.40%和0.58%,且大部分模拟数据落在不确定性区间内,模拟结果的不确定性较小,表明所构建的SWAT径流模型具有较高的精度,在北江飞来峡流域适用性良好。
In order to meet the requirement of non-point source pollution load calculation in the Feilaixia watershed,the SWAT runoff model was used to simulate the daily runoff process in the study area from1969 to 2011. Based on the hydrological,meteorological,terrain,land use data and soil types of the Feilaixia watershed,the SWAT runoff model was constructed. The 14 runoff parameters were calibrated by SUFI-2 method in SWAT-CUP,and their sensitivities were analyzed too. The quantitative evaluation of the runoff simulation effect was carried out. The results showed that the parameters which have significant influence on the runoff process included CN2,CH_N2,GW_DELAY,SURLAG and so on. In the daily runoff process,Nash-Sutcliffe coefficients were both up to 0. 83 in the calibration and the verification period,and the relative errors were 1. 40% and 0. 58%. The simulation results obtained a smaller uncertainty as most of the simulated value lay on the uncertainty interval,indicating that the constructed SWAT runoff model has excellent accuracy and high applicability to the Feilaixiawatershed.
出处
《水资源与水工程学报》
CSCD
2017年第5期1-7,共7页
Journal of Water Resources and Water Engineering
基金
广东省水利科技创新项目(2016-22)
