Effect of Wind and Soil Moisture on the Wind-Drift Caused by Wind Erosion

DOI Web Site 9 References
  • ARIMORI Masahiro
    Ministry of Agriculture, Forestry and Fisheries, Tohoku Regional Agricultural Administration Bureau, Mabechigawa Irrigation Project Office
  • ENDO Yasushi
    Ministry of Agriculture, Forestry and Fisheries, Tohoku Regional Agricultural Administration Bureau, Mabechigawa Irrigation Project Office
  • KOBAYASHI Takashi
    Ministry of Agriculture, Forestry and Fisheries, Tohoku Regional Agricultural Administration Bureau, Mabechigawa Irrigation Project Office

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Other Title
  • 風食による土壌飛散に風・土壌水分が及ぼす影響
  • 風食による土壌飛散に風・土壌水分が及ぼす影響--岩手県奥中山高原地区の火山灰性土壌畑における事例
  • フウショク ニ ヨル ドジョウ ヒサン ニ カゼ ドジョウ スイブン ガ オヨボス エイキョウ イワテケン オクナカヤマ コウゲン チク ノ カザンバイセイ ドジョウバタケ ニ オケル ジレイ
  • － 岩手県奥中山高原地区の火山灰性土壌畑における事例 －
  • - The case of volcanic ash soil fields in Okunakayama Highland, Iwate prefecture -

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Abstract

Wind rises particular strong in April and May at Okunakayama Highland, located in Northern Iwate, where wind erosion damages highland vegetables and crops. In order to realize actual situations of wind erosion, quantity of wind- drift soil particles, wind velocity and soil water content were observed during April and May for three years from 2005 to 2007. It was found that wind erosion occurred when soil water content fell below 28% and wind velocity reached 8m·s-1. Also soil water content fell to nearly 28% within three days after significant rainfall. Past occurrence situations of wind erosion was estimated by using the data of drought days and wind velocity, based on the weather data in April and May of past 30 years. It was found that wind erosion was the yearly event, especially it occurred between mid-April and beginning of May. Also found that the quantity of wind-drift soil particles increased between 11 am and 3 pm, and wind erosion rarely occurred in the morning, the evening and the mid-night.

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