基于统一重现期的小流域设计洪水推算方法
By constructing a regional reference system and a multi-frequency data model, the problems of data scarcity and scale mismatch in the estimation of design floods in small watersheds have been solved, and high-precision flood estimation has been achieved under the condition of no measured hydrological data. It is applicable to small mountain watersheds with a catchment area of no more than 500 km2.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHAANXI WATER CONSERVANCY & ELECTRIC POWER SURVEY & DESIGN INSTITUTE (GROUP) CO LTD
- Filing Date
- 2025-12-10
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies suffer from data scarcity and scale mismatch in the estimation of design floods in small watersheds, resulting in large estimation errors. This is especially true in small mountain watersheds with a catchment area of no more than 500 km2, where the lack of measured hydrological data and mismatch between the area of the reference stations make it impossible to guarantee the accuracy of existing methods.
By constructing a regional reference system and utilizing information from benchmark stations and survey sections, a flood peak flow-area power function model and a frequency coefficient correlation model are established through multi-frequency data to estimate the design flood peak flow of small watersheds, breaking through the area limitation of a single station and realizing a robust extension of flood patterns.
It achieves high accuracy and reliability in estimating design floods for small watersheds without actual hydrological data. The deviation between the estimated results and historical flood survey values is within 5%, making it suitable for promotion and application by grassroots water conservancy departments.
Smart Images
Figure CN121834115B_ABST