Application of Universal Soil Loss Equation (USLE) to mountainous forests in Japan |
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Authors: | Hikaru Kitahara Yoichi Okura Toshiaki Sammori Akiko Kawanami |
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Institution: | (1) Faculty of Agriculture, Shinshu University, 399-4598 Nagano, Japan;(2) Forestry and Forest Products Research Institute, 305-8687 Ibaraki, Japan;(3) Present address: Department of Forest Science, Faculty of Agriculture, Shinshu University, Minamiminowa-mura 8304, 399-4598 Nagano, Japan |
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Abstract: | Universal Soil Loss Equation (USLE), originally developed by the USDA for agricultural lands and then used throughout the
world, was applied in mountainous forest terrain in Japan. The slope length and steepness factors were extended for long slope
lengths and steep slopes by recalculating the data from available literature in Japan and by using data from supplementary
erosion experiments. As such, we conclude that the USLE can be used successfully to estimate surface erosion on long, steep
mountainous forest slopes. The cover and management factors of many kinds of natural and artificial forest stands, cutting
types, and disturbance regimes were calculated from the literature. The support practice factors of many types of soil and
water conservation practices were also calculated from published information. Based on these results, we showed that the USLE
can be applied to estimations of soil erosion from wide areas including many kinds of agricultural and forest lands.
This study was funded by the Agricultural, Forestry, and Fishery Technology Council Office for comprehensive studies on agriculture,
forestry, and fisheries and the agricultural, forestry, and fishery trading, resources, and environments. |
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Keywords: | cover and management factors slope length factor steepness factor support practice factor USLE |
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