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タイトル被膜シートを敷設した斜面における降雨中の水分変化に関する実験的研究
タイトルヨミヒマク シート オ シキセツ シタ シャメン ニオケル コウウチュウ ノ スイブンヘンカ ニ カン スル ジッケンテキケンキュウ
タイトル別表記Experimental Study on the Change of Soil Moisture under the Protective Sheets Designed to Prevent Soil Erosin Caused by Rainfall
作成者日下, 達朗
深田, 三夫
寺島, 治男
ロイ, キンシュック
作成者ヨミクサカ, タツロウ
フカダ, ミツオ
テラシマ, ハルオ
ロイ, キンシュック
作成者別表記Kusaka, Tatsuro
Fukuda, Mitsuo
Terashima, Haruo
Roy, Kingshuk
作成者所属山口大学農学部
内容記述(抄録等)To investigate the effectiveness of protective sheets designed to prevent soil erosion caused by rainfall,two experiments were conducted. Rainfall was artificially generated by a rainfall simulator in order to observe the variations of tension of soil moisture beneath the protective sheets for a given period of rainfall. The another experiment was designed to pbserve the traced out flow patterns through the soil and the protective sheets using colored injected materials and a transparent water channel apparatus. Three types of protective sheets were spread out on three adjacent plots composed of MASA soil with equal dimensions of 18^。 Slope, 10 m length, 1 m width and 50 cm depth. The intensity of the rainfall varied within the limit of 25 mm for 4 hours to 200 mm for 1 hour. The tension of soil moisture at the points of 1m, 5m, 9m from the downward ending of each plot and 10cm, 25cm, 40cm beneath the sheet of each points were recorded automatically by the tensiometers. Simultaneously, the volume of runoff, seepage and the mass of sediment from these plots were also measured. From the results of the first experiment, it was found that, in the cases of rainfall-intensity 50 mm and 100 mm, the tension of soil moisture at the point of 10 cm depth, started to decrease first and followed at the points of 25cm, and 40cm respectively. As a result, the water-table began to rise. Finally, when the water table reached the soil surface, the volume of runoff and soil loss reached at their maximum values. In the cases of 150 mm and 200 mm, runoff and soil loss started to occur about the same time the rainfall was applied. The results obtained from the second experiment showed that the fibrous sheets prevented rill-formation by absorbing water and dispersing the flow due to their high permeable characteristics.
本文言語jpn
著者キーワードSoil erosion
Rainfall
Protective sheet
Rainfall simulator
主題農学
資料タイプtext
出版者山口大学農学部
出版者ヨミヤマグチ ダイガク ノウガクブ
NII資料タイプ紀要論文
ISSN0513-1715
NCIDAN00244250
学内刊行物(紀要等)山口大学農学部学術報告
掲載誌名山口大学農学部学術報告
掲載誌名別表記Bulletin of the Faculty of Agriculture, Yamaguchi University
41
開始ページ1
終了ページ12
発行日1993-12
著者版/出版社版その他
リポジトリIDD490041000001
地域区分山口大学
URIhttp://www.lib.yamaguchi-u.ac.jp/yunoca/handle/D490041000001