Research On Pollution Characteristics And Utilization Technology Of Rainwater Runoff For Lin Tong Campus

In this paper,the Lintong Campus of Xi'an University of Science and Technology was taken as the research object.Through the systematical detection and analysis on the runoff pollution during the 14 times of natural rainfall in the research area,the law of the change of the pollutant concentration of rainfall runoff along with the rainfall time,the characteristic of distribution of runoff pollutant concentration,the scouring characteristic of pollutants,etc were summarized.On this basis,the technology of rainwater utilization suitable for Lintong campus was put forward.The model of rainwater utilization was constructed basically.The main conclusions were as follows:(1)As detection results of natural rainfall runoff pollutants under different regions,different underlying surfaces and different rainfall intensities showed:The difference of types and concentration of pollutants was larger.The rainfall runoff pollution in the comprehensive area was more serious than that of the living area,teaching area or sports area;In the road with violent social activities compared with estate mask,there was more potential pollution;Under different rainfall intensities,the concentration variation of pollutants was not obvious.The total pollutant concentration of rainfall runoff was higher than that of V water quality standard in the national surface water environmental quality standard(GB3 83 8-2002).(2)The concentrations of different pollutants in the research area varied with rainfall duration and rainfall intensity.In heavy rain,because the rainfall runoff on surface erosion was intense,the pollutant concentration changed rapidly,and vice versa.However,there was no direct relationship between the average value of the concentration of runoff pollutants and the rainfall intensity or rainfall.(3)Through the quantitative analysis on the initial extent of erosion of different underlying surface runoff in the research area,it was concluded that,there were obvious first flush effect characteristics.It provided an important basis for the establishment of the control standard of initial rainwater interception as well as the design and planning of storm-water closure measures.(4)Through the analysis of the characteristics of rainfall runoff pollution,it could be seen that:there was a good correlation among the concentrations of pollutants SS,pollutants COD,pollutants NH3-N,pollutants TN,pollutants TP and pollutants SS.It was showed that,the higher the pollutant removal rate was,the higher the removal rates of the 4 kinds of pollutants were.(5)By estimating the collectible rain water in the research area,combining the actual demand in Lintong campus,the tentative plan of comprehensive utilization of rainwater was put forward.Also,the model of rainwater utilization in different regions and different types of catchment areas was established basically.In the current situation of rainwater resources pollution in China,comprehensive utilization of technology behind,there is no use of the system and many other reasons,the study of regional rainwater runoff pollution and utilization of China's rainwater resources utilization technology has a certain role in promoting the development.