Effect of Urbanization on Flood Runoff Characteristics in Suburban Low Land Areas of Imba Marsh, Japan

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概要

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• Flood discharge is prone to increase year by year due to the urbanization in the basin. In this study, the Imba Marsh basin, where rapid urbanization has occurred during past 30 years, is selected and the effects of land-use change on flood runoff characteristics in the basin is investigated to evaluate the change of the flood mitigation function, caused by the decline in agricultural and forest lands. The following findings are obtained through this investigation ; 1) The maximum water level of Imba marsh during floods is higher in periods B (1979-1988) and C (1989-1997) than in period A (1969-1978), and 2) In the case of 3-day continuous rainfall of 278 mm that is the design flood rainfall, 2.65 million m^3 flood water increase is caused by the decline in agricultural and forest lands during the 20 years. The 1 ha decrease in agricultural or forest land results in the 360 m^3 increase in flood water.

• 日本雨水資源化システム学会の論文

著者

• Fujii Hideto

  National Research Institute Of Agricultural Engineering

• Kiri Hirohide

  National Research Institute of Agricultural Engineering

• Nakaya Tetsuo

  National Research Institute of Agricultural Engineering

• Kiri Hirohide

  National Institute For Rural Engineering

関連論文

• Effect of Urbanization on Flood Runoff Characteristics in Suburban Low Land Areas of Imba Marsh, Japan
• Summary of the 19th Symposium on Agriculture and Agricultural Community Improvement in Central and South America
• Evaluation of pollutant removal in a constructed irrigation pond

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