Distributed model-oriented method for sub-basin division of small and medium-sized river basins

The sub-basin delineation method, which utilizes watershed morphology analysis and dynamic threshold optimization, addresses the scientific rigor and adaptability issues in sub-basin delineation under complex terrain, improves the accuracy and stability of hydrological simulation, and is applicable to watershed management under different terrain and hydrological conditions.

CN120087266BActive Publication Date: 2026-06-09HEFEI UNIV OF TECH
2 Cites 0 Cited by

Patent Information

Application Number
CN202510159588.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-02-13
Publication Date
2026-06-09
Estimated Expiration
2045-02-13

AI Technical Summary

Technical Problem

Existing methods for subdividing watersheds are difficult to accurately depict watershed morphology in complex terrains. Fixed threshold settings lack adaptability, flow direction calculations contain errors, and boundaries are discontinuous, resulting in insufficient accuracy and stability in hydrological simulations.

Method used

By employing watershed morphological feature analysis, multi-scale feature fusion, dynamic threshold optimization, hydrological network topology construction, and neural network optimization, combined with watershed morphological parameters and hydrodynamic characteristics, the sub-watershed catchment area threshold is adaptively adjusted to optimize flow direction calculation and confluence analysis, dynamically adjust boundaries, and introduce Wasserstein distance to optimize sub-watershed division.

Benefits of technology

It improves the scientific rigor and adaptability of sub-basin delineation, enhances the computational accuracy and stability of hydrological simulation, reduces flow direction calculation errors, avoids fragmented sub-basins, and improves the reliability of watershed hydrological calculations.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

This invention discloses a method for sub-basin delineation in small and medium-sized watersheds based on a distributed model, comprising the following steps: S1, collecting digital elevation model (DEM) data, performing depression filling processing, and extracting preliminary river network information; S2, extracting the actual river system and calculating the elevation difference of the main stream grid; S3, adjusting the DEM data based on the elevation difference to optimize the river network extraction results; S4, calculating watershed morphological parameters and classifying the watershed using a manifold learning method; S5, constructing an optimal threshold calculation model for sub-basins and dynamically adjusting the sub-basin delineation threshold; S6, performing flow direction calculation, confluence analysis, and sub-basin delineation, and optimizing the sub-basin boundaries; S7, validating the method using a distributed hydrological model, analyzing the impact of the delineation results, and optimizing the sub-basin delineation parameters. This invention integrates multi-scale features, dynamic threshold optimization, and hydrological network topology to improve the accuracy of sub-basin delineation, boundary continuity, and hydrological simulation stability, achieving intelligent watershed delineation.
Need to check novelty before this filing date? Find Prior Art