摘要
选取昆明市明通河流域为研究区域,在暴雨管理模型(SWMM模型)参数敏感性分析、模型率定的基础上,对明通河流域进行了降雨径流水量水质模拟。结果表明:SWMM模型水文水力模块中最灵敏参数为不透水率,水质模块中污染物最大累积量、污染物累积速率均为灵敏参数,而冲刷系数和冲刷指数的灵敏度受降雨强度影响波动较大。水量水质模拟结果与实测结果较为吻合,模型率定取得了满意的结果。模拟结果显示,研究区降雨径流总氮、总磷、化学需氧量单位面积负荷率分别为75.6、8.5、697.8 kg hm-2a-1,城市降雨径流污染在滇池流域面源污染中占有较大份额。
Simulation of the quantity and quality of urban runoff is an important process in the management and control of urban runoff pollution. Based on sensitivity analysis and calibration of the Storm Water Management Model（ SWMM）parameters,we simulated the quantity and quality of urban runoff to the Mintong catchment from Kunming city. The results showed that the most sensitive parameter in the quantity model is the percentage of imperviousness. In the quality model,the maximum buildup possible and the buildup rate constant are the most sensitive parameters. The sensitivities of the washoff coefficient and washoff exponent are influenced by the rainfall intensity. The quantity and quality of the simulated and measured runoffs showed good correlation. The calibration is was satisfactory. The simulation results showed that the annual pollutant loads of urban runoff for TN（ total nitrogen）,TP（ total phorphrous）,and COD（ chemical oxygen demand）are were 75. 6,8. 5 and 697. 8 kg hm^- 2a^- 1,respectively. The load of urban runoff pollution is an important factor in the diffuse pollution in the Dianchi basin.
出处
《生态学报》
CAS
CSCD
北大核心
2015年第6期1961-1972,共12页
Acta Ecologica Sinica
基金
国家水体污染控制与治理科技重大专项(2012ZX07102001-002)
云南应用基础研究(2008ZC103M)
