Analysis of Soil Erosion and Sediment Transport along a Rill Channel using a Sediment Transport Model

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
本文フルテキスト
35-04-05.pdf195.61 KB

A mathematical model was developed to simulate soil erosion and sediment transport along rills in a field. For the model, a continuity equation for sediment with a term for the sediment transport capacity of rill flow was used. The Yang sediment transport equation was used to estimate this capacity. First, the equation of the model was solved under various intensities of rainfall events occurring during the observation, and the characteristics of the sediment load distribution along the rill in the field for study were clarified based on the results obtained. Second, net rill erosion at many positions along the rill was calculated using the solutions of the equations. Due to the good agreement between the calculated and observed values, the sediment transport model was found to be valid. Third, the effect of the sediment transport rate on the detachment rate along the rill was analyzed. The results showed that the effect was not appreciable in the case of moderate or higher rainfall intensity throughout the rill, while it became more pronounced when the distance along the rill increased under low intensity rainfall.

刊行年月日
作成者 Azuma TAKAGI Seiji NAKAO Tatsumi TOMOSHO
著者キーワード

rill erosion

inter-rill erosion

sediment transport capacity

公開者 Japan International Research Center for Agricultural Sciences
データ作成日
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
35
4
開始ページ 245
終了ページ 254
DOI 10.6090/jarq.35.245
権利 Japan International Research Center for Agricultural Sciences
言語 eng