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2001•PROCEEDINGS OF HYDRAULIC ENGINEERINGOpen access

CHANGE OF THE RUNOFF CHARACTERISTICS DUE TO THE RECOVERY OF VEGETATION

Shigeki Kobatake, Ryosuke Arai, Yoshihiko Shimizu, Kensaku MATSUMOTO, Ryuichi FUJII

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Abstract

The current paper investigates how storm and long term runoff characteristics changed with the growth and increase of vegetation in the Ashio basin. Ashio basinwas damaged by wood fire and smoke pollution resulting from copper refining. However, tree planting and sand control works have been carried out and vegetation is recovering.In order to study the change of runoff characteristics due tothe recovery and growth of vegetation, we installed rainfall and water gauges at5 points in the Ashio basin. For the sake of accuracy, beside our observations, we also considered in our study, results of water stage observations made by the Ministry of Construction and by the Forestry Agency. As a results peak discharge, total outflow of flood, as well as outflow of long term have been decreasing due to vegetation increase and recovering.

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The current paper investigates how storm and long term runoff characteristics changed with the growth and increase of vegetation in the Ashio basin. Ashio basinwas damaged by wood fire and smoke pollution resulting from copper refining. However, tree planting and sand control works have been carried out and vegetation is recovering.In order to study the change of runoff characteristics due tothe recovery and growth of vegetation, we installed rainfall and water gauges at5 points in the Ashio basin. For the sake of accuracy, beside our observations, we also considered in our study, results of water stage observations made by the Ministry of Construction and by the Forestry Agency. As a results peak discharge, total outflow of flood, as well as outflow of long term have been decreasing due to vegetation increase and recovering.

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Available abstract

The current paper investigates how storm and long term runoff characteristics changed with the growth and increase of vegetation in the Ashio basin. Ashio basinwas damaged by wood fire and smoke pollution resulting from copper refining. However, tree planting and sand control works have been carried out and vegetation is recovering.In order to study the change of runoff characteristics due tothe recovery and growth of vegetation, we installed rainfall and water gauges at5 points in the Ashio basin. For the sake of accuracy, beside our observations, we also considered in our study, results of water stage observations made by the Ministry of Construction and by the Forestry Agency. As a results peak discharge, total outflow of flood, as well as outflow of long term have been decreasing due to vegetation increase and recovering.

Key concepts: Environmental science, Vegetation (pathology), Surface runoff, Hydrology (agriculture), Tree planting, Flood myth, Geography, Agroforestry

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