Study On Rainwater Utilization And Rainwater Pipe Network Simulation In Living District

China is a water-scarce county, per capita water occupancy volume is much lower than the world average. With the growth of residents' water consumption, overexploitation of underground water and pollution of water resource, water crisis is becoming more and more serious in populous cities. China has a continental monsoon climate in most parts, with plenty of rain in summer. The development of urbanization greatly impact on rainwater runoff. Traditional stormwater drainage system is designed to discharge the rain immediately, which always results in wasting water. Rainwater utilization drew more and more attention in recent years.As the starting side of the stormwater drainage system, rainwater utilization in living district will reduce the displacement of rain and increase the quantity of available water. In this thesis, community drainage system was simulated in order to evaluate the effect of community rainwater utilization.By simulating a new designed campus stormwater drainage system of a university in Tianjin, this thesis is to study on the application of simulation technology on design of rainwater pipe network.First, this paper aims to find appropriate methods rainwater utilization for the new campus, and then analysis the simulation results of the designed network before and after the utilization.This paper introduces the methods and major projects of rainwater utilization, mature pipe network simulation software at home and abroad. This paper summarizes the water resources situation in China and the effects of urbanization on rainwater runoff.After the analysis on rainfall precipitation, rainwater qualities of different underlying surfaces of cities in China, rainwater utilization is proved feasible in most cities, and will bring enormous economic and environmental benefits. Some concrete methods for utilizing rainwater have been proposed according to the actual condition. This paper evaluated the impacts of the use of rainwater on the stormwater drainage system by comparing the simulation results of the designed network before and after the utilization. This paper combined rainwater utility with the rainwater drainage system simulation, provided basis for rainwater utilization and rainwater pipe network designing.