基于Mike Urban的小城市排水內澇規(guī)劃
[Abstract]:In the context of global warming, the frequency of extreme weather events has increased significantly in recent decades, among which the urban waterlogging caused by extreme rainfall occurs frequently in various cities in China. The safety of life and property of the people has been seriously affected. Urban rainwater network system is one of the important infrastructure of the city, which is responsible for collecting and eliminating Rain Water. In the past, the design recurrence period of rainwater pipe network in most cities of China was generally 1 ~ 3 years, but rainfall events above this standard are likely to cause urban waterlogging disaster. However, the recurrence period of design in some small cities is generally within 0.5 ~ 1 years. In addition, the drainage facilities construction in small cities is backward and the emergency management capacity is insufficient, so the problem of waterlogging appears more frequently. How to effectively improve the urban drainage system and prevent the occurrence of waterlogging disaster has become a key livelihood issue that the government attaches importance to and people are concerned about. Because the traditional drainage pipe network is often calculated by empirical formula method, this method is more general in the calculation process, and the calculation process only takes into account the peak flow, not the whole process. Compared with the traditional method, the results obtained by software simulation method are more accurate and comprehensive. The main contents and achievements of this paper are as follows. 1. Analysis of the causes of urban waterlogging. The causes of waterlogging mainly include natural factors and human factors. The arrangement of basic information of rainwater pipe network. Firstly, the pipeline survey data is processed by GIS software, and then the census data is transformed into Hongye CAD file by using Hongye CAD software. Collecting, sorting and inputting the basic information of rainwater pipe network is the most time-consuming and laborious work in the process of establishing the waterlogging simulation model, and it is also a work that has a great influence on the model precision. Transformation of rainwater network information. The rainwater pipe network in E City of Zhejiang Province was pretreated with Amis software and transformed into a format that Mike Urban could recognize. The collation and transformation of rainwater network information is the foundation of subsequent modeling work. The waterlogging simulation model of rainwater pipe network is established. Taking the rainwater pipe network system of E city in Zhejiang province as an example, according to the present situation of Rain Water system in E city, using the software of Mike Urban, the waterlogging simulation model of rainwater pipe network in E city is established. First, determine the basic parameters required for the rainwater network model, secondly, divide and connect the catchment area, thirdly, determine the rainfall boundary conditions, and finally complete the establishment of runoff production model and pipe flow model .5. Rain Water current drainage capacity check and waterlogging simulation. In the case of free discharge and submerged discharge in different recurrence periods, the overflow of Rain Water inspection well is calculated. According to the simulation results of the waterlogging model of rainwater pipe network in E city, the performance of urban drainage system under various working conditions is obtained, and the distribution of waterlogging is judged. Find out the waterlogging point. 6. Drainage and waterlogging planning is formulated. According to the calculation results of the waterlogging simulation model of the rainwater pipe network, this paper makes the targeted rainwater network planning, and draws out the short-term emergency plan and long-term sustainable plan to solve the urban waterlogging. The countermeasures and suggestions to solve the problem of urban waterlogging are put forward.
【學位授予單位】:浙江工業(yè)大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TU992.01
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