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Study on the Effect of Runoff Storage and Pollution Reduction of Urban Green Space

Author: FanQunJie
Tutor: YangKai
School: East China Normal University
Course: Environmental Science
Keywords: Management of stormwater runoff Green space system Regulating Pollution reduction
CLC: TU992
Type: Master's thesis
Year: 2006
Downloads: 629
Quote: 13
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Abstract

Water problems, flooding, sewage problems are the the three hydrological response in the urbanization process, management of urban water environment of the important issues. Solving the problem of the water, flood, sewage, urban stormwater runoff management has an important significance in recent years by the widespread concern in the international. Combined triage system construction of the drainage system to solve the local area of ??stagnant water and the water environment pollution problem but also show more inadequate, and explore how to meet the multiple benefits of the environmental, ecological, economic, and other stormwater treatment utilization measures is one of the focuses of the research in this field. Carry out urban greening system effects of regulation and storage of rainwater runoff and pollution reduction effects of paper and try to explore its application in the management of urban stormwater runoff, and to provide for the construction of urban green space system and ecological drainage system science reference . Papers rely on the sub-topics of major scientific and technological project of Shanghai Municipal Science and Technology Commission of the central city and the new urbanized area non-point source pollution control key technologies and demonstration (04DZ12024) \analysis, historical data collection, basic statistics on the basis of the analysis of field experiments, using a combination of qualitative and quantitative analysis methods, focusing on the effect of urban green space system of regulation and storage of rainwater runoff, preliminary demonstration of urban green space system of rainwater runoff pollution reduction effects and build urban green space system of rainwater runoff storage and pollution reduction measures and management strategies. Based on the history and trends of urban stormwater management and construction of urban green space system, the importance of the construction of urban green space system for the management of urban stormwater runoff. Ability to penetrate the water retention capacity of urban green space and its influencing factors. The analysis of the study plots show that soil stable infiltration rate of 1.53 × 10 ^{-6 ~ 4.90 × 10 ^{-5 m / s between vegetation configuration and artificial stampede impact; greenbelt soil moisture content was significantly higher than bare soil, soil moisture content, by green vegetation configuration and elevation settings affect the more significant. Regulating effect of urban green space for stormwater runoff, the argument from the point of view of the land-use regulation, water green compound, green space structure (1) land use regulation analysis shows that the proportion of green area changes can cause changes in the area runoff coefficient, green area difference between the proportion of 10%, a larger proportion of the drainage system area runoff peak time lag of about 20min; (2) Changfeng Park typical Shuilv complex system of runoff and storage capacity of the system than smaller comparative analysis shows that the water green composite system can play a better role in the runoff storage; (3) structural differences in point of view of the greenery, the simulation of the proposed budget of the sunken green storage effect of soil stable infiltration rate, green area than concave depth parameters concave herbaceous infiltration capacity storage, Green Function of Regulation there were obvious differences under different design parameters. Pollutant reduction analysis of indoor simulation experiments show that the greenbelt COD, NH ₄-N, TN, TP and other pollutants have cut role reductions significantly higher than bare soil. Green space and bare soil better removal of COD, NH ₄-N, TN and TP removal effect is weaker. Comprehensive utilization management strategies such as to establish socialized water management mechanisms, the ecological system building Shuilv networking, the development of a variety of regulation and storage measures conducive to promoting urban ecological construction of the drainage system as well as the improvement of the urban water environment.}}

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