Drawing and coding method for large-scale complex river network massive fine regular grids of river basin

Abstract

The invention discloses a drawing and coding method for large-scale complex river network massive fine regular grids of a river basin. The method comprises the steps of S1, identifying structure layers and boundary range layers of a river basin water system body; S2, obtaining river reaches of rivers of a river basin water system segment by segment; S3, drawing two-dimensional regular grids of the rivers and coding the grids in the rivers; S4, carrying out two-dimensional compilation on the two-dimensional regular grids, thereby obtaining an integrated grid; S5, carrying out one-dimensional compilation on the integrated regular grid; and S6, establishing one-dimensional grid relationships. According to the method, on the basis of an existing massive regular grid method and tool, the large-scale massive grids are increased, reduced and coarsened simply and effectively, the grids are drawn once and can be used for life, and the data support is provided for calculation of values based on the regular grids.

Description

technical field [0001] The invention belongs to the field of fluid mechanics and environmental simulation, and relates to a method for drawing and compiling massive fine regular grids of large-scale complex river networks in a watershed. Background technique [0002] The grid is the premise of discretizing the whole unit and performing finite element numerical simulation calculation. With the continuous development of fluid dynamics calculations based on finite element numerical calculations and 2D and 3D hydrodynamic water quality mathematical models, as well as the needs of environmental management for large-scale and high-precision simulation calculations of watersheds, high-precision massive grids are constructed to meet the needs of calculations. The scope changes at any time, the calculation accuracy is constantly changing, etc., how to draw a high-precision massive grid system, and based on this set of grids to meet the ever-changing calculation needs, is an important...

AI Technical Summary

Problems solved by technology

However, the existing regular grid drawing technology and software are limited by computer memory and hardware conditions, and the number of grids that can be drawn at one time is limited.

In the regular grid drawing of the large river network, it is completely unable to meet the grid requirements of the high-precision intersecting river network

At the same time, using the two-dimensional coding method of the regular grid, there will be a large number of invalid grids in the river network area. These grids are not within the river channel and belong to the land range. It will also be covered by the grid, resulting in waste of grid units and an increase in the amount of discrete iterative calculations

With the ever-changing computing requirements, grid drawing and editing methods that can dynamically meet the computing requirements, increase or decrease, and can be thick or fine, have become a major challenge in the field of numerical simulation.

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