A method for optimizing river cross-sections during one-dimensional hydrodynamic modeling.

Abstract

This invention discloses a method for optimizing river cross-sections during the modeling process of a one-dimensional hydrodynamic model. The method includes extracting cross-sectional topographic data from a river topographic map, drawing an image of each cross-section based on the topographic data, and determining the river slope using the lowest point elevation of each cross-section. For floodplains exhibiting "L"-shaped and / or "I"-shaped cross-sections, the river cross-sections are linearly extended. For two adjacent river cross-sections with an elevation difference greater than a preset elevation difference, a certain number of new river cross-sections are inserted between them. The water level corresponding to the river cross-section at the specified end time of the model is simulated using the original river cross-section data, and the extended and interpolated river cross-section data are extracted based on the corresponding water level, retaining the valid river cross-section data. The advantages are: it effectively improves the efficiency of river cross-section optimization, is not only simple to operate, but also greatly saves the manpower and time costs of data optimization, and can well meet the needs of efficient and accurate model construction.

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