Analysis of rainfall runoff characteristics from a subtropical urban lawn catchment in South-east China
Analysis of rainfall runoff characteristics from a subtropical urban lawn catchment in South-east China作者机构：Environmental Science Research CenterXiamen UniversityXiamen 361005China Department of Environmental Science and EngineeringTsinghua UniversityBeijing 100084China Fujian Institute of OceanographyXiamen 361012China
出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)
年 卷 期：2012年第6卷第4期
页 面：531-539页
核心收录：
学科分类：07[理学] 08[工学] 070602[理学-大气物理学与大气环境] 081501[工学-水文学及水资源] 0815[工学-水利工程] 0706[理学-大气科学]
主 题：rainfall runoff first flush pollution characteristics urban lawn catchment
摘 要：Characteristics of rainfall runoff from a 3.26 hm^2 urban catchment with predominant land-use as lawn in Xiamen City, South-east China were investigated and analyzed. Water quality and quantity measurements of rainfall runoff were conducted for ten rainfall events over the period March, 2008 to April, 2009. The results indicated that chemical oxygen demand （COD） and total phosphorus （TP） were the major pollutants with event mean concentrations of 56.09 and 0.44mg.L^-1. From hydrograph and pollutograph analysis of two typical rainfall events, it was clear that the peak rainfall preceded the peak flowrate by about 15-20 min. Meanwhile, concentrations of major pollutants showed multiple peaks and these peaks usually preceded peak flowrate. There were no distinctive first-flush effects except for the rainfall events with the longest rainfall duration and largest runoff volume, which was verified by the fact that the first 30% runoff volume （FF30） carried 39.36% of the total suspended solids （TSS） load, 35.17% of the COD load, 28.13% of the TP load and 39.03% of the nitrate nitrogen load. Multivariate regression analysis further demonstrated that the total runoffvolume had a positive correlation with the FF30 of TSS and COD.
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