Thus it is very difficult to calculate the spill volume and water quality because they involve many processes such as rainfall , yield runoff of rainfall 、 flow concentration of surface runoff , ground pollutant build up 、 washout , the flow concentration of combined drainage system and cso 其中,合流制排水系统的溢流水量、水质的确定涉及到降雨,地面产流、汇流,地表污染物的累积、冲刷,污水在管渠中的汇流以及溢流等多种因素,采用一般方法很难定量计算。
Chapter 3 and 4 researches soil depurating function and rule to rainwater by soil columniation penetrating examination on the basis of the two former chapters . and it analyses the influence of soil structure , contamination burthen and penetrating deepness to depurating effect , and discusses contaminate cumulation and renewing ability of soil 第三章和第四章在前两章的基础上,通过土壤柱渗透试验,研究了雨水在土壤中的净化作用及其规律,分析了土壤结构、污染物负荷、渗透深度对土壤净化效果的影响,并对污染物的累积和土壤净化能力的恢复进行了探讨。
的: 4次方是 The fourth power of 2 i ...累积: accumulate污染物的累积;积累: build-u(of pollutants)沉积物的累积: deposit accumulation污染物的毒性: toxicity of pollutant污染物的路径: pathway of a pollutant污染物的浓度: concentration of pollutant污染物的排放: emissions of pollutant污染物的危害: hazards of pollutants污染物的循环: cycle of pollutants污染物的影响: pollutant effects污染物的转移: tra fer of a pollutant; tra ferofapollutant; transfer of a pollutant污染物累积指数: accumulation index of pollutants等污染物的含量: nox空气污染物的来源: source of air pollutant污染物的安全浓度: safe concentration of pollutant污染物的长期效应: long-term effects of pollutants污染物的持久性: persistence of pollutant污染物的传播途径: pollutant pathway污染物的大量排放: massive discharge of pollutant污染物的排入大气: atmo heric i ut (of pollutants); atmospheric input (of pollutants); atmospheric input (of pollutants)污染物的铅直梯度: vertical gradient of pollutant; verticalgradientofpollutant污染物的侵蚀转移: transport of pollutant by erosion污染物的生物降解: biodegradation of pollutants污染物的生物解析: biodegradation of pollutants