Runoff features for interrill erosion at different rainfall intensities, slope lengths, and gradients in an agricultural loessial hillslope
Runoff features for interrill erosion at different rainfall intensities, slope lengths, and gradients in an agricultural loessial hillslope
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DOI：
10.2136/sssaj2003.0844
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发表时间：
2003-05-01
影响因子：
2.9
通讯作者：
Le Bissonnais, Y
中科院分区：
文献类型：
--
作者：
Chaplot, VAM;Le Bissonnais, Y
降雨强度、坡度、坡长和耕作方式之间的相互作用对细沟间侵蚀产流特征有一定的影响。尽管有许多研究，但很少分析它们对径流产生和途径以及由此产生的土壤流失的影响。在田间和耕作条件下尤其如此。研究了降雨强度、坡长和坡度对耕作农田细沟间侵蚀产流量和途径的影响。径流特征和土壤流失进行了评估，位于4至8%的坡度，并在自然和模拟降雨强度范围为1.5至30毫米h（-1）的1-和5米长的有界地块。径流系数（R）范围从34至98%，而泥沙浓度（SC）变化从2.9至49克升（-1）。径流系数受降雨强度、降雨量和降雨量3个因子的影响，降雨强度与径流系数呈显著正相关（r=0.48; P
Various interactions, particularly those existing between the rainfall intensity, the slope gradient, the slope length, and the tillage supposedly can affect the runoff features for interrill erosion. Despite numerous studies, their effect on runoff production and pathways and the resulting soil losses have seldom been analyzed. This is especially true under field and tillage conditions. This study investigated the effect of rainfall intensity, slope length, and gradient on runoff amount and pathways for interrill erosion in tilled fields. Runoff features and soil losses were evaluated on bounded plots of 1- and 5-m length located on 4 to 8% slope gradients, and under natural and simulated rainfalls with intensities ranging from 1.5 to 30 mm h(-1). Runoff coefficients (R) ranged from 34 to 98% whereas sediment concentrations (SC) varied from 2.9 to 49 g l(-1). The runoff coefficient was affected by all three factors: rainfall intensity (r=0.48; P