Version 1
: Received: 13 June 2024 / Approved: 13 June 2024 / Online: 14 June 2024 (03:14:10 CEST)
How to cite:
ZHONG, S.; GUO, S.; He, Y.; XIE, Y. A Novel Flood Regional Composition Method for Design Flood Estimation in the Cascade Reservoirs. Preprints2024, 2024060942. https://doi.org/10.20944/preprints202406.0942.v1
ZHONG, S.; GUO, S.; He, Y.; XIE, Y. A Novel Flood Regional Composition Method for Design Flood Estimation in the Cascade Reservoirs. Preprints 2024, 2024060942. https://doi.org/10.20944/preprints202406.0942.v1
ZHONG, S.; GUO, S.; He, Y.; XIE, Y. A Novel Flood Regional Composition Method for Design Flood Estimation in the Cascade Reservoirs. Preprints2024, 2024060942. https://doi.org/10.20944/preprints202406.0942.v1
APA Style
ZHONG, S., GUO, S., He, Y., & XIE, Y. (2024). A Novel Flood Regional Composition Method for Design Flood Estimation in the Cascade Reservoirs. Preprints. https://doi.org/10.20944/preprints202406.0942.v1
Chicago/Turabian Style
ZHONG, S., Yanfeng He and Yuzuo XIE. 2024 "A Novel Flood Regional Composition Method for Design Flood Estimation in the Cascade Reservoirs" Preprints. https://doi.org/10.20944/preprints202406.0942.v1
Abstract
The design flood estimation should consider the regulation of upstream cascade reservoirs which has significantly altered downstream hydrologic regime. The current flood regional composition (FRC) methods do not consider the unfavorable reservoir operation conditions for flood prevention. In this paper, a novel framework, the most unfavorable flood regional composition (MUFRC) method, was proposed based on the flood risk analysis to estimate design flood in cascade reservoir operation period. The results of case study in Yalong River basin indicated that: (1) The proposed MUFRC method would allocate more flood volume into downstream uncontrolled sub-basin, and the precise definition of flood loss could make great difference on MUFRC method for rational estimation of design flood. (2) The 1000-year design flood peak, 3-day and 7-day flood volume of the outlet section estimated by MUFRC method are 15400 m3/s, 3.91, and 8.42 billion m3 respectively, which are all greater than values estimated by other FRC methods; (3) The reduction of design floods in reservoir operation period result the adjustment of flood control water level in downstream reservoirs, which could additionally generate 460 million kW·h (+1.82%) hydropower during flood season. Comparison study and sensitivity analysis further proves that the MUFRC method could rationally allocate flood volume and meanwhile balance the flood prevention risk and comprehensive utilization benefits, which is worth for further study and practical application.
Keywords
Design flood; Cascade reservoirs; Flood regional composition; The most unfavorable situation; Flood volume allocation; Yalong River basin
Subject
Engineering, Civil Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
