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2011•Journal of Water Resources and Water EngineeringRequires access

Research on characteristics of hydrology and water quality on rainwater runoff of urban roof

Bian Yanli

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Abstract

The purpose of this study is identifying and characterizing the hydrological process of urban roof runoff,as well as concentrating variation of pollutants.The aim is to provide the base for the effective utilization of rainwater in city and the control of non-point pollution.The urban roof rainfall was collected in Xinxiang City by volume method.The examples were taken to analyze the contents of pH,SS,COD,and DO.The runoff coefficient of roof is 0.92~0.98.At the beginning the runoff water quality is bad,and in later period the concentration of COD and SS are separately below 25 mg/L and 30 mg/L.The runoff curve is similar with the shape of rainfall process,both of them fluctuate lightly.The correlation between COD and SS is good,but that is small between DO and these pollutants.The runoff water quality is mainly affected by rainfall,rainfall intensity,roof material,season,air temperature.

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What this paper is about

The purpose of this study is identifying and characterizing the hydrological process of urban roof runoff,as well as concentrating variation of pollutants.The aim is to provide the base for the effective utilization of rainwater in city and the control of non-point pollution.The urban roof rainfall was collected in Xinxiang City by volume method.The examples were taken to analyze the contents of pH,SS,COD,and DO.The runoff coefficient of roof is 0.92~0.98.At the beginning the runoff water quality is bad,and in later period the concentration of COD and SS are separately below 25 mg/L and 30 mg/L.The runoff curve is similar with the shape of rainfall process,both of them fluctuate lightly.The correlation between COD and SS is good,but that is small between DO and these pollutants.The runoff water quality is mainly affected by rainfall,rainfall intensity,roof material,season,air temperature.

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Available abstract

The purpose of this study is identifying and characterizing the hydrological process of urban roof runoff,as well as concentrating variation of pollutants.The aim is to provide the base for the effective utilization of rainwater in city and the control of non-point pollution.The urban roof rainfall was collected in Xinxiang City by volume method.The examples were taken to analyze the contents of pH,SS,COD,and DO.The runoff coefficient of roof is 0.92~0.98.At the beginning the runoff water quality is bad,and in later period the concentration of COD and SS are separately below 25 mg/L and 30 mg/L.The runoff curve is similar with the shape of rainfall process,both of them fluctuate lightly.The correlation between COD and SS is good,but that is small between DO and these pollutants.The runoff water quality is mainly affected by rainfall,rainfall intensity,roof material,season,air temperature.

Key concepts: Rainwater harvesting, Surface runoff, Environmental science, Hydrology (agriculture), Roof, Pollutant, Water quality, First flush

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