Rainwater pipe network flow calculation method and system based on GIS underlying surface analysis
A calculation method and technology of rainwater pipes, applied in calculation, structured data retrieval, instruments, etc., can solve the problems of few types, insufficient pertinence of data, and lack of characteristic data of the underground surface where the project is located, so as to improve calculation accuracy and improve The effect of accuracy
A calculation method and technology of rainwater pipes, applied in calculation, structured data retrieval, instruments, etc., can solve the problems of few types, insufficient pertinence of data, and lack of characteristic data of the underground surface where the project is located, so as to improve calculation accuracy and improve The effect of accuracy
CN110717233AActive Publication Date: 2020-01-21WUHAN MUNICIPAL ENG DESIGN & RES INST
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[0049] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0050] Such as figure 1 and figure 2 As shown, a method for calculating the flow rate of rainwater pipe network based on GIS underlying surface analysis includes the following steps,
[0051] S1, create a GIS generalized model of the rainwater pipe network system based on the database files related to inspection wells and pipelines;
[0052] S2, performing preprocessing on the GIS generalized model, dividing the water catchment range for the inspection well, and obtaining sub-drainage areas;
[0053] S3, setting different runoff coefficients for plots of different land use properties in the underlying surface of the drainage area, and analyzing the underlying surface of the drainage area based on the sub-drainage...
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The invention relates to the technical field of urban rainwater pipe network planning, design and evaluation, in particular to a rainwater pipe network flow calculation method and system based on GISunderlying surface analysis, and the method comprises the steps: building a GIS generalization model of a rainwater pipe network system based on a database file related to an inspection well and a pipeline; preprocessing the GIS generalization model, and dividing a water catchment range for the inspection well to obtain sub-drainage areas; analyzing the underlying surface of the drainage area based on land properties of the land parcel, endowing the land parcel with different land properties with different runoff coefficients, and redividing the underlying surface of the drainage area by taking the polygon of the sub-drainage area as a boundary to obtain sub-underlying surfaces; and calculating the confluence of the pipeline based on the sub underlying surface polygon geometric area and the corresponding runoff coefficient. The diversity of the underlying surface in the drainage area is fully respected, the accuracy of rainwater pipe network catchment amount calculation is improved, and a feasible calculation method is provided for planning and designing work of the rainwater pipe network in China.
Description
technical field [0001] The invention relates to the technical field of urban rainwater pipe network planning, design and evaluation, in particular to a rainwater pipe network flow calculation method and system based on GIS underlying surface analysis. Background technique [0002] At present, the most widely used in the planning and design of my country's urban rainwater pipe network and the evaluation of the current rainwater pipe network is the reasoning formula method. Its core essence is the superposition of the constant flow equation and catchment area. The calculation method is shown in the following formula: Q=q · f · ψ. In the calculation of rainwater pipe network flow based on the reasoning formula method, Ψ usually uses the comprehensive runoff coefficient of the pipe network service area, that is, the comprehensive runoff coefficient method. At this time, the attribute information of the underlying surface of the drainage area is generalized, and various types of u...
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Patent Timeline
21 Jan 2020
Publication
CN110717233A
- IPC
- G06F30/18; G06F16/29; G06Q50/26
- CPC
- G06F16/29; G06Q50/26
- Inventors
- 杨涛; 王正雄