A method for identifying pollution sources of direct drainage of rainwater pipe network sewage

Abstract

The invention discloses a method for identifying pollution sources of direct discharge of sewage in rainwater pipe networks, which includes: 1. generating initial input *.inp files required for running SWMM software; 2. defining SWMM input parameters in Matlab for direct discharge of sewage in pipe networks The value range, sampling step size and number of samples of the three parameters of node number, emission concentration and emission amount; 3. In Matlab, use a three-layer loop to sample all sample combinations, and update the parameter information in the corresponding position in the *.inp file ; 4. Use the command "!swmm5.exe in Matlab <input file> <report file>"Call the swmm5.exe program outside Matlab, use the information in the updated *.inp file to calculate, and store the calculation result in the *.rpt file; 5. Calculate the likelihood function value when sampling for the ith time; 6, sort parameter combination by likelihood function value from large to small.Advantage of the present invention is: can effectively determine the position, discharge rate of direct discharge of sewage in the rainwater pipe network, reduce the required workload of loaded down with trivial details manual identification, Improve traceability efficiency.< / report>

Description

technical field [0001] The invention belongs to municipal engineering information technology, and in particular relates to a method for identifying direct discharge pollution sources of rainwater pipe network sewage by integrating SWMM models and Matlab software. Background technique [0002] Sewage leaks and leaks frequently occur in the urban rainwater pipe network system, causing serious pollution to the receiving water body, resulting in deterioration of the water quality of the receiving water body and even black and smelly water. At present, the identification of this type of sewage direct discharge at home and abroad is still based on physical methods such as in-pipe video camera tracking, dye tracer and other on-site survey and search modes. Due to the many branches of the rainwater pipe network and the occurrence of direct sewage discharge is discontinuous, the efficiency of physical methods to find the pollution source of direct sewage discharge is low, and the inf...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the difficulties in finding the pollution source of direct discharge of sewage in the rainwater pipe network, the technical problem to be solved by the present invention is to provide a method for identifying the pollution source of direct discharge of sewage in the rainwater pipe network, which can effectively determine the position and discharge volume of the direct discharge of sewage in the rainwater pipe network, Reduce the workload required for tedious manual identification, improve the efficiency of traceability, and play the role of water protection and emergency warning

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