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A GIS-based urban one-dimensional hydrodynamic simulation basic data topological relation construction and coding method

A technology of topological relationship and basic data, applied in the construction and coding of topological relationship of pipeline network, the processing of basic data of urban one-dimensional hydrodynamic modeling, and the field of urban river course. problems such as high density, to achieve the effect of improving efficiency and accuracy

Active Publication Date: 2019-06-18
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

In traditional watershed hydrological and hydrodynamic simulations, the topological relationship of rivers is often established by means of river classification and node coding based on the digital elevation model (DEM). Mixed connection of river channels, the similar methods used for watershed channel coding are no longer applicable, and urban river channels and pipe networks are denser in space, so it is time-consuming and labor-intensive to establish their topological relationship by means of human eye recognition and manual coding. and very error prone

Method used

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  • A GIS-based urban one-dimensional hydrodynamic simulation basic data topological relation construction and coding method
  • A GIS-based urban one-dimensional hydrodynamic simulation basic data topological relation construction and coding method
  • A GIS-based urban one-dimensional hydrodynamic simulation basic data topological relation construction and coding method

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Embodiment 1

[0092] Taking a residential area in Xiamen as an example, the practice of constructing the topological relationship and coding method of the basic data of urban one-dimensional hydrodynamic simulation based on GIS was carried out.

[0093] 1. Get the line layer

[0094] figure 1 It is a line layer shp file, in which the solid line segment is the pipe network, and the dotted line segment is the river channel.

[0095] 2. Line segment turning point

[0096] Step 3) is used to turn the corner points of the river, figure 2 Vertex-to-point operation for the river line layer and its result;

[0097] Step 3) is used to perform the point-to-point operation on the pipeline vertices, image 3 Vertex-to-point operation and its result for pipeline layer;

[0098] Figure 4 shows the attribute data of the river channel and pipeline layer after turning points.

[0099] 3. Remove duplicate nodes

[0100] Using step 4), buffer analysis is performed on the node. Figure 5 is the analys...

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Abstract

The invention discloses a GIS-based urban one-dimensional hydrodynamic simulation basic data topological relation construction and coding method. The method comprises the following steps: firstly, obtaining shp files of urban riverways and pipe networks; combining the riverway and the pipe network line layers respectively; then, carrying out operation in ArcGIS software: converting a river channeland pipe network turning point into nodes; removing repeated points from the transferred nodes; removing repeated nodes between two layers of the riverway and the pipe network; respectively disconnecting a riverway and a pipe network by using break points, respectively encoding nodes of the riverway and the pipe network, respectively encoding the riverway and the pipe, respectively constructing topological relations of the riverway and the pipe, and finally respectively merging a point layer and a line layer to obtain a node Node layer corresponding to a one-dimensional line segment Link witha uniform number. According to the invention, the efficiency and precision of urban one-dimensional hydrodynamic modeling can be improved.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to the processing of basic data for urban one-dimensional hydrodynamic modeling, specifically a method for constructing and encoding topological relationships of urban rivers and pipe networks. Background technique [0002] Under the background of rapid urbanization and climate change, urban flood disasters occur frequently, which have become the main disasters in my country's urban natural disasters, seriously affecting the order of urban production and life. Urban flood simulation is an important technical means for urban flood control, planning, scheduling, and early warning. It is mainly divided into hydrological simulation, one-dimensional (river, pipe network) hydrodynamic simulation and two-dimensional (surface inundation) hydrodynamic simulation. In urban one-dimensional (river, pipe network) hydrodynamic simulation, it is an important basis for data ...

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Application Information

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IPC IPC(8): G06F16/29G06Q50/26
Inventor 梅超刘家宏王浩张坤李泽锦丁相毅杨志勇李蒙王开博付潇然
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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