雨水花園徑流調(diào)蓄工況研究
[Abstract]:In the process of urban development, the road construction in a large area has changed the original surface runoff path and infiltration process of cities and towns, blocked the surface Rain Water leakage path, and caused problems such as flood disaster, water pollution and aquatic environment damage, etc. Rain Water Garden, a new ecological comprehensive utilization system, can make full use of Rain Water resources, play a role in peak reduction of surface rain flood, maximize the local infiltration of rain flood, and prevent the occurrence of flood disaster. In this paper, the experimental site of a built Rain Water garden system in Chengdu is selected as the experimental research area, and the runoff and infiltration process of Rain Water garden system is analyzed, and the drainage system structure of Rain Water is analyzed, and the local rainfall is monitored synchronously. Changes of water storage level in Rain Water garden. The Rain Water garden system model is established, the calculation method is selected, the operation control parameters are determined, and the runoff regulation and storage process of the Rain Water garden system is obtained. The model calculation under different rainfall intensity is compared with the experimental data. The runoff reduction rate of Rain Water garden system was obtained, and the runoff regulation capacity was evaluated. The main research achievements are as follows: (1) the calculation model of runoff regulation and storage process of Rain Water garden system is established, the running process of Rain Water garden system is analyzed, the comprehensive monitoring data and the result of simulation calculation are analyzed. It is verified that Rain Water garden system has obvious regulating and storing function of Rain Water, and the model established is more suitable and representative for the rainfall pattern with large rainfall intensity and relatively short rainfall duration than the actual experimental system of Rain Water garden. The effect of regulation and storage is more obvious. (2) six rainfall fields with good fit are selected to evaluate the regulation and storage function of Rain Water garden system by calculating the total runoff reduction effect by the model. The total reduction rate ranges from 46.88 to 85.24. The average value is 60.67 and the maximum value appears on July 22, which is 85.24. (3) from the results of model system calculation and condition analysis, it can be seen that Rain Water peak flow of 9 rainfall confluences in this study did not exceed the design limit. Therefore, the internal storage volume of Rain Water garden can meet the demand of typical rainfall runoff regulation and storage, the system operating condition is normal, and the system design stability is high.
【學(xué)位授予單位】:西南交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU992;TU986
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