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言語
英語
著者
AFLIZAR
Amirizal SAIDI
HUSNAIN
Rudy INDRA
DARMAWAN
HARMAILIS
SOMURA Hiroaki
Toshiyuki WAKATSUKI
内容記述(抄録等)
Quantitative evaluation of soil erosion rates provides important baseline data to investigate, manage and improve land use systems. However, soil erosion analyses have not been sufficiently conducted in Indonesia. In the present study, we investigated the spatial distribution of soil erosion rates in relationship to land use patterns in the Sumani agricultural watershed, the primary rice-producing region in West Sumatra. The soil erosion rate was estimated applying the Universal Soil Loss Equation (USLE) using representative soil survey data obtained in the watershed. Sediment delivery ratio (SDR, i.e. sediment yield / soil erosion rate) was determined from sediment yield data, which was generated in a previous study. Soil erosion rate in the Sumani watershed was estimated as 43.13 Mg ha-1y-1 in 1992 and 58.91 Mg ha-1y-1 in 2002 (annual averages). These values are far greater than the tolerable soil erosion rates (TER) for Indonesia i.e. 14 Mg ha-1y-1. Natural factors, including heavy rainfall and local soil properties in a landscape susceptible to soil erosion were the fundamental factors responsible for the high soil erosion in the watershed. In addition to these causes, changes in land use accelerated soil erosion. From 1992 to 2002, the soil erosion rate showed a 37% increase due to forest conversion to agricultural fields. SDR in five sub-watersheds exhibited relatively small values ranging from 6% to 15%, indicating an accumulation of eroded soil particles in flat areas in the lower part of the watershed where the land is primarily allocated to sawah.
主題
USLE
Indonesia
land use change
erosion
sediments
掲載誌名
Tropics
19
1
開始ページ
29
終了ページ
42
ISSN
0917-415X
ISSN(Online)
1882-5729
発行日
2010
DOI
出版者
日本熱帯生態学会
出版者ヨミ
ニホン ネッタイ セイタイ ガッカイ
出版者別表記
JAPAN SOCIETY OF TROPICAL ECOLOGY
資料タイプ
学術雑誌論文
ファイル形式
PDF
著者版/出版社版
出版社版
業績ID
e11756
部局
生物資源科学部
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