What does this research mean for the field?

Land with water retarding function can reduce peak flow rates by approximately 8.4 m³/s during a 50-year probability rainfall event in the Kawabe River. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

The study aims to evaluate the flood control function of land designed for water retention and propose enhancements using roughness-enhancing wooden fences.

February 22, 2026Japanese Journal of JSCE0 citations

Flood Control Effect of Land With Water Reyarding Function and Enhancement Using Rougness-Enhancing Wooden Fences in the Kawabe River

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TMTomoko MINAGAWA MTMako TATEBE AOAkito OUCHI

Key Points

The study aims to evaluate the flood control function of land designed for water retention and propose enhancements using roughness-enhancing wooden fences.
Conducted hydraulic analysis of flood control in the Kawabe River area.
Evaluated two areas with water-retaining land for flood mitigation effectiveness.
Proposed and assessed the impact of installing roughness-enhancing wooden fences with specific spacing.
Securing water-retaining land reduces surrounding flood areas during 50-year rainfall events.
Estimated peak flow reduction of approximately 8.4 m³/s with water-retaining land.
Optimal spacing of 50m for wooden fences yields maximum peak flow reduction during 30-year rainfall events.

Abstract

川辺川で計画されている「遊水機能を有する土地」の流出抑制機能を氾濫解析により評価するとともに，強化策として粗度柵工（木材を間隔をあけて数段積み上げた木柵を流水に対して横断方向に複数列配置した木柵群）を提案し有効性を評価した．解析の結果，遊水機能を有する土地（2地区）を確保することにより，50年確率規模の降雨に対して周辺の氾濫域を減少させるとともに，ピーク流量を約8.4m³/s低減する効果があると推定された．また，下鶴地区を対象に粗度柵工を設置した場合，30年確率降雨においては，配置間隔を50m（粗度係数で0.06相当）とすることで最大のピーク流量低減効果が得られると推定された．粗度柵工は治水効果を高める手法として有効な選択肢になりうる可能性がある．

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Cite This Study

MINAGAWA et al. (2026) studied this question.

synapsesocial.com/papers/699a9ceb482488d673cd2926 https://doi.org/10.2208/jscejj.25-16182

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February 22, 2026Japanese Journal of JSCE0 citations

Flood Control Effect of Land With Water Reyarding Function and Enhancement Using Rougness-Enhancing Wooden Fences in the Kawabe River

View Full Paper

TMTomoko MINAGAWA MTMako TATEBE AOAkito OUCHI

Key Points

The study aims to evaluate the flood control function of land designed for water retention and propose enhancements using roughness-enhancing wooden fences.
Conducted hydraulic analysis of flood control in the Kawabe River area.
Evaluated two areas with water-retaining land for flood mitigation effectiveness.
Proposed and assessed the impact of installing roughness-enhancing wooden fences with specific spacing.
Securing water-retaining land reduces surrounding flood areas during 50-year rainfall events.
Estimated peak flow reduction of approximately 8.4 m³/s with water-retaining land.
Optimal spacing of 50m for wooden fences yields maximum peak flow reduction during 30-year rainfall events.

Abstract

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View Full Paper

Cite This Study

MINAGAWA et al. (2026) studied this question.

synapsesocial.com/papers/699a9ceb482488d673cd2926 https://doi.org/10.2208/jscejj.25-16182

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