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|標題:||The Investigation of Sediment Delivery Ratios for Watershed in Taiwan
|關鍵字:||AGNPS;農業非點源污染模式;Sediment delivery ratio;Sensitive factor;泥砂遞移率;敏感因子||出版社:||水土保持學系||摘要:||
Agricultural non-point source pollution model (AGNPS) was applied to predict the runoff, soil erosion, sediment delivery ratio, and sediment yield of various watersheds. Furthermore, the input parameters, such as rainfall amount, rainfall erosivity, soil erodibility, Mannings roughness coefficient, vegetative cover factor, and curve number (CN) were selected to analyze their sensitivity to the sediment delivery ratio. The results indicated that rainfall amount and curve number were directly related to sediment delivery ratio. On the contrary, rainfall erosivity, Mannings roughness coefficient, soil erodibility, and vegetative cover factor were inversely related to sediment delivery ratio. The soil surface cover factor was not sensitive to sediment delivery ratio. The sensitive ranking of these parameters are Mannings coefficient, rainfall erosivity, soil erodibility, vegetative cover factor, rainfall amount, and curve number.
AGNPS can be applied as planning tool for watershed management However, the sensitive input parameters must be assessed carefully in order to obtain reasonable results.
|Appears in Collections:||水土保持學系|
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