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通过室内模拟降雨试验研究了降雨强度(简称雨强)对石灰岩土壤坡面产流产沙过程和侵蚀过程,结果表明:雨强在60~100 mm/h之间、其他条件相同,坡面动态径流量随雨强的增大而增大,即100 mm/h>85 mm/h>60 mm/h。雨强为100 mm/h时,坡面径流总量为540.97 L;雨强为60 mm/h时,径流总量为332.28 L,且100 mm/h时的径流总量约是60 mm/h时的1.6倍。同一雨强下,泥沙含量在产流初期迅速增大到峰值,随后持续下降,20 min后趋于稳定。
Rainfall intensity was used to study the process of runoff and sediment yield and limestone erosion on the limestone soils. The results show that the rainfall intensity is between 60-100 mm / h and the other conditions are the same. The dynamic runoff on the slope The amount increases with the rainfall intensity, ie 100 mm / h> 85 mm / h> 60 mm / h. When the rainfall intensity is 100 mm / h, the total runoff on the slope surface is 540.97 L; when the rainfall intensity is 60 mm / h, the total runoff is 332.28 L, and the total runoff at 100 mm / h is about 60 mm / h When 1.6 times. Under the same rainfall intensity, the sediment content rapidly increased to its peak during the initial runoff period, then continued to decline, and stabilized after 20 min.