Complicated river channel gridding method used for simulation of river channel hydrological numerical value

A numerical simulation and gridding technology, applied in image data processing, 2D image generation, instruments, etc., can solve problems such as uneven two-dimensional grid, numerical calculation accuracy, deviation, etc., to achieve a good data foundation, strong The effect of adaptability and versatility

Inactive Publication Date: 2012-06-13
NANJING UNIV
View PDF2 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main problems of the channel Thompson method are: (1) In the case of complex continents, shoals and shorelines, river banks, unsteady flow banks and moving boundaries caused by numerical solutions, the fitting between the grid and the channel bank is the same. There will be actual deviation; (2) For the common wide and narrow channel planar forms, the numerical calculation accuracy problems may be caused by the uneven spacing of the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Complicated river channel gridding method used for simulation of river channel hydrological numerical value
  • Complicated river channel gridding method used for simulation of river channel hydrological numerical value
  • Complicated river channel gridding method used for simulation of river channel hydrological numerical value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The purpose and effects of the present invention will become more apparent by referring to the accompanying drawings in detail of the present invention.

[0029] Such as figure 2 As shown, it is a flow chart of an embodiment of a complex river gridding method for river hydrological numerical simulation of the present invention, including the following steps:

[0030] The first step, data reading - read the two-dimensional river vector data to be gridded; such as image 3 As shown, the channel consists of non-self-intersecting arcs.

[0031] The second step, river channel segmentation - divide the channel into several polygonal collections along the channel direction, and for the channel area containing Jiangxin Island, segment the river channels on both sides of Jiangxin Island respectively, and the divided polygons are distributed along the longitudinal direction of the channel;

[0032] In this step, the method of dividing the rivers on both sides of Jiangxinzhou i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a complicated river channel gridding method used for simulation of a river channel hydrological numerical value. Various complicated river channel regions with tributary exit conflux, tributary entrance conflux and a central bar and the like are freely segmented into simple region sets; and according to a river channel numerical value simulation demand, a region control curve grid spacing is arranged, so that a two-dimensional grid is generated; and simple region grids are merged so as to obtain an initial grid of the complicated river channel after subdivision. For a specific region of a river channel water front, the region mesh point density can be increased flexibly according to demands, so that grid encryption division in the region can be realized. According to the invention, a Laplace equation is solved and convergence precision is set; initial grid orthogonalization can be realized, so that a river channel two-dimensional orthogonal grid is finally obtained. Moreover, the conception of the method is ingenious and adaptability is good; gridding processing can be carried out on a complicated river channel containing a central bar; and designated grid encryption can be carried out in practice according to demands.

Description

technical field [0001] The invention relates to a complex river channel gridding method for river channel hydrological numerical simulation, and belongs to the grid generation technology in fluid mechanics and the spatial data interpolation technology field in geographic information system (GIS). Background technique [0002] Numerical simulation of river channels integrates computer science, fluid mechanics, mathematical theory of partial differential equations, computational geometry, numerical analysis and other disciplines. In addition to relying on the development of these disciplines, its development is more directly reflected in the two-dimensional grid of river channel plane simulation. Build technology dependencies. When applying methods such as finite difference method and finite volume method to numerically solve the numerical simulation of river channel, it is necessary to generate corresponding calculation grids, and the quality of the generated grids directly a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06T11/00
Inventor 王结臣程亮周生路陈刚杨柳
Owner NANJING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap