Sewage pipe network hydraulic model building method based on three-dimensional geographic information

Abstract

The invention belongs to the field of municipal engineering urban sewage pipe networks, and provides a three-dimensional geographic information-based sewage pipe network hydraulic model establishment method, which comprises the following steps of: collecting a physical corresponding relationship between each inspection well node of a sewage pipe network and surrounding buildings through three-dimensional geographic information; estimating the population as prior information according to the corresponding relation, determining a total inflow time sequence of all inspection well nodes in the area by using an optimization algorithm based on the population proportion, and performing optimization calculation on the flow fluctuation coefficient of each inspection well node so as to determine the inflow time sequence of each inspection well node. The accurate establishment of a hydraulic model of the sewage pipe network is realized.the invention provides a method for replacing sewage pipe length / catchment area data with population data to serve as prior information of sewage pipe network flow checking, and the problem of multiple solutions generally existing in an existing simulation technology of the sewage pipe network is more reasonably solved. The check result of the flow of the sewage pipe network is more accurate in the absence of enough monitoring data.

Description

technical field [0001] The invention belongs to the field of urban sewage pipe network of municipal engineering, and in particular relates to a method for establishing a hydraulic model of the sewage pipe network. Background technique [0002] The urban sewage pipe network is an important urban infrastructure for maintaining the urban water environment and preventing the spread of diseases, and is crucial to ensuring the public health and ecological health of the city. In recent years, with the growth of population and the intensification of urbanization, the spatial scale and structural complexity of the sewage pipe network have also increased significantly. Coupled with the aging phenomenon of the system, many problems have appeared in the operation and management of the sewage pipe network, some of which are typical problems Including pipeline blockage, pipeline leakage, misconnection of rain and sewage, illegal discharge, sewage overflow, etc. These problems seriously p...

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Problems solved by technology

However, this presupposition does not necessarily conform to the actual situation. For example, for the sewage pipelines used for transmission, although the pipelines are long, the surrounding user density is very low and the inflow of sewage is very small; , a shorter length may correspond to a large amount of sewage

Similarly, larger catchments may also have very low density buildings, resulting in low discharge volumes

If the pipe length and catchment area are directly used as prior information to check the sewage pipe network model, the flow check results may deviate from the actual situation, which may lead to false positives and missed negatives in the monitoring system.

A more reasonable method is to use the corresponding population as a priori, because the population, that is, the number of users, is closely related to the amount of sewage discharge. However, population data is more difficult to obtain than the length of the pipe, and there are large fluctuations, so it is difficult to directly in the Application in actual engineering

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