不同排水体制下城市降雨径流污染负荷核定方法

ESTIMATING LOAD OF URBAN RUNOFF POLLUTION IN DIFFERENT DRAINAGE SUSTEMS

针对目前我国现存的主要3种排水体制,合流制、截流式合流制和分流制,讨论了不同排水体制下,城市降雨径流污染负荷核定的不同方法.常用的方法基本是针对完全合流制和分流制而建立的,而截流式合流制是现在大多数城市都在使用的排水体制,在计算该体制下降雨径流污染负荷时应将截流部分和直接排放的部分分别计算,其计算方法应与适用于合流制的降雨径流污染负荷核定方法区分开,有利于更准确地核定城市降雨径流污染负荷,对城市规划和建设有一定的指导意义.

Three main drainage systems at present are the combined drainage system,the interception combined drainage system and the separated drainage system.Methods of estimating load of urban runoff pollution are discussed for different drainage systems.Numerous methods could be used for combined drainage and separated drainage systems,but limited number of methods can be applied to interception combined drainage system.When estimating urban runoff pollutant loads,proper methods must used for interception combined drainage system to obtain correct estimates,this will be meaningful for urban water environment planning and design.