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以土槽模拟自然坡面,在人工降雨条件下,对黑土坡面径流参数进行了分析。结果表明:随着降雨强度(简称“雨强”)和坡度的增大,黑土坡面径流的初始产流时间缩短,径流量和径流系数增加。在前期降雨条件下,二次降雨所表现的径流侵蚀特征均强于首次降雨。黑土坡面产生细沟的时间随坡度增大而缩短,当坡度>15°时,细沟产生时间基本一致,细沟的数量及长、宽、深等参数增大,坡度对沉积的影响作用大于降雨强度。
Soil slot simulation of natural slope, artificial rainfall conditions, the black slope runoff parameters were analyzed. The results showed that initial runoff time of runoff on black slope was shortened and runoff and runoff coefficient increased with the increase of rainfall intensity (referred to as “rainfall intensity”) and slope gradient. Under the pre-rainfall conditions, the characteristics of runoff erosion of secondary rainfall are stronger than the first rainfall. When the slope is greater than 15 °, the generation time of the rill is basically the same, the number of the rill, the length, width, depth and other parameters increase, and the influence of the slope on the sedimentation is affected Greater than rainfall intensity.