Automatic division method for element mathematical model section of water and sediment habitat of one-dimensional river network

Abstract

The invention discloses an automatic division method for an element mathematical model section of a water and sediment habitat of a one-dimensional river network, which comprises the following steps of determining a central point, a river channel left bank boundary point and a river channel right bank boundary point of a river section along a river width direction from upstream to downstream, anddetermining a river section central line, a left bank line and a right bank line; then sequentially calculating cumulative distances lc, i from each central point Pc, i (xc, i, yc, i) to the first central point Pc, 1 (xc, 1, yc, 1) of the entrance position of the river reach along the central line Lc from upstream to downstream; setting the total number Ns of sections needing to be defined in theriver reach, and calculating the distance between every two adjacent sections; determining vertical feet Ps and m coordinates (xs, m, ys, m) of the mth section Sm and the center line; determining a point skew equation of a straight line where the section Sm is located; calculating plane coordinates of left and right bank end points of the section; and finally, performing interpolation calculationon the elevation zs, m, i, ys, m and i of each section point (xs, m, i) on the Sm section, calculating the distance dxi between each section point and the starting point of the left bank, and obtaining an elevation data pair (dxi, zs, m and i). The invention solves the problem of automatically dividing the section of a one-dimensional river network model.

Description

technical field [0001] The invention relates to a method for automatically dividing sections of a mathematical model of one-dimensional river network water and sand habitat elements, and belongs to the technical fields of hydraulics, river dynamics, water ecology, water environment and soil and water conservation. Background technique [0002] The one-dimensional mathematical model of water and sand habitat elements in river networks is an important tool for solving the movement and transformation information of water and sand habitat elements in rivers, lakes, estuaries and coasts. In research and engineering practice, carrying out one-dimensional river network calculation, section division and interpolation are prerequisites. The efficiency of cross-section division involving this type in the prior art is not high. At present, in the process of one-dimensional river network calculation, for river sections without fixed cross-sections, the division of cross-sections is main...

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Problems solved by technology

[0003] In order to overcome the problems of the prior art, the present invention proposes a method for automatically dividing the section of a one-dimensional river network water and sand habitat element mathematical model section, and intends to solve the problem of automatically dividing the section of the one-dimensional river network model

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