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ID 115498
Title Alternative
IMPROVEMENT OF FLOOD REDUCTION FUNCTION OF FORESTED BASIN BY REINFORCEMENT OF EVAPORATION RATE AND GOUUND ROUGHNESS
Author
Ueda, Shotaro
Keywords
Forest
Flood reduced function
Evaporation
Ground roughness
Basin flood control
Content Type
Journal Article
Description
流域治水における活用を念頭に,遮断蒸発率と地表面抵抗の増強による森林の洪水低減機能の向上について洪水ピーク流量の視点から検討した.徳島県内に位置する2つの林地(一斉植林・皆伐型施業のスギ人工林,弱間伐・択伐型施業のスギ・ヒノキを中心とする針広混交複層林)を対象に水文観測を実施し,地表面流分離直列二段タンクモデルと将来予測降雨を用いた流出シミュレーションを実施した.遮断蒸発率と地表面抵抗の洪水ピークの流量低減と遅延効果について検討した結果,対象としたスギ人工林を針広混交複層林・弱間伐に変更すると20%程度の洪水ピーク流量低減効果を得られる可能性が示唆された.
Description Alternative
Two forest operation techniques with an flood peak reduction effect were discussed using a tank-model and two small artificial forested basins where forest physiognomy was different. One operation was the way to strengthen the insulation evaporative rate by changing its physiognomy, other was the way to make forest floor vegetation and ground roughness increased. The effect when artificial cedar forest was replaced with a mixed conifer-hardwood forest was discussed. As a result, it was estimated that the flood peak flow decreased around 20% before the replacement.
Journal Title
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)
ISSN
2185467X
Publisher
土木学会
Volume
76
Issue
2
Start Page
I_127
End Page
I_132
Published Date
2020
Rights
© 2020 公益社団法人 土木学会
EDB ID
FullText File
language
jpn
TextVersion
Publisher
departments
Science and Technology