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鉴于目前很多学者对弃土场的研究,主要集中在室外天然降雨和人工模拟降雨监测上,而在室外由于受到工程建设时限和其他因素制约,并不能对各影响因素做定性研究的实际,利用室内模拟降雨对弃土场侵蚀产沙过程进行模拟试验研究,寻求侵蚀产沙规律及主要影响因素。试验结果为:弃土坡面侵蚀沟出现时间随降雨强度的增加而缩短;产沙量随降雨强度的增加而增加,但在雨强较小情况下,坡面产沙量最初随降雨的持续而逐渐增加,达到一个峰值后,便开始减少,并趋于稳定,而在大雨强条件下,坡面产沙量随降雨的持续呈波动增加状态,侵蚀量增加较快;在同一降雨强度条件下,坡面产沙量随坡度的增加而增加。
In view of the fact that many scholars study the spoil ground mainly on outdoor natural rainfall and artificial rainfall monitoring, due to the restriction of engineering construction time limit and other factors in the outdoors, it is impossible to make qualitative research on each influencing factor and use it Simulated rainfall experiment on the process of sediment erosion and sediment yield in simulated groundwater seeks for the law of erosion and sediment yield and its main influential factors. The results showed that the appearance time of the erosion ditch on the abandoned soil slope shortened with the increase of rainfall intensity, and the sediment yield increased with the increase of rainfall intensity. However, under the condition of smaller rainfall intensity, And then gradually increased. After reaching a peak value, it began to decrease and became stable. Under heavy rainfall conditions, the sediment yield of the slope increased with the increase of rainfall, and the erosion increased rapidly. Under the same rainfall intensity condition Under the slope, the amount of sediment increases with the increase of slope.