Quantitative analysis and evaluation of disaster reduction effectiveness of flood storage and detention areas based on numerical simulation

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Flood storage and detention areas significantly reduce downstream flood peaks and economic losses, with their maximum disaster reduction effectiveness—such as a 27.55% reduction in GDP loss during a 20-year flood—being heavily constrained by the facility's scale. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Xinhang HE; Xiaoli HAO; Mei XU; Shu LIU; Linan HU; Shulan SHI

doi:10.3724/j.jiwhr.20250173

May 1, 2026Journal of China institute of water resources and hydropower research

Quantitative analysis and evaluation of disaster reduction effectiveness of flood storage and detention areas based on numerical simulation

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Key Points

The study aims to evaluate the effectiveness of flood storage areas in reducing flood risk in urban regions, using numerical simulation.
Conducted numerical simulations of flood scenarios before and after the creation of flood storage areas in the Beisha River region.
Analyzed the impact of various flood return periods on flood risks and affected areas.
Utilized hydraulic dynamics principles to assess flood evolution and mitigation effects.
Flood storage areas significantly reduced downstream flood peaks, impacting up to 27.55% in GDP loss reduction during 20-year flood scenarios.
Flood risk areas and water depths were lowered dramatically, resulting in enhanced urban safety.
The effectiveness of the mitigation was constrained by the scale of the flood storage facilities, with varying benefits observed for different flood return periods.

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Implication

Evaluates flood risk reduction in urban areas using flood storage systems, suggesting significant benefits.

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Cite This Study

HE et al. (2026) studied this question.

synapsesocial.com/papers/6a1fc3a6dee9eb8c0dce51d0 https://doi.org/10.3724/j.jiwhr.20250173

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Quantitative analysis and evaluation of disaster reduction effectiveness of flood storage and detention areas based on numerical simulation

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Quantitative analysis and evaluation of disaster reduction effectiveness of flood storage and detention areas based on numerical simulation

Key Points

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Implication

Abstract

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