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通过人工降雨模拟典型喀斯特裸坡面径流过程试验研究,结果表明:在相同坡度和基岩裸露率的喀斯特地表、地下双层空间开放水文系统条件下,不同降雨强度和地下孔裂隙度的地表、地下径流分配呈负相关并具有临界点和交叉平衡点;二者随降雨过程的变化具有同步性;与降雨强度、地下孔裂隙度和降雨历时呈多元线性相关,相关程度分别是降雨强度>地下孔裂隙度>降雨历时,其中地表径流与降雨强度及降雨历时呈正相关,与地下孔裂隙度呈负相关,地下径流与降雨强度及地下孔裂隙度呈正相关,与降雨历时呈负相关。
The results show that under the condition of karst surface and underground double open space hydrological system with the same slope and bedrock bareness rate, the surface and surface features of different karst rainfall intensity and subsurface porosity, The distribution of groundwater runoff was negatively correlated and had a critical point and a cross-balance point. Both of them were in synchronicity with the change of rainfall process, and were linearly correlated with rainfall intensity, subsurface pore frac- ture and rainfall duration. The correlativity was rainfall intensity> underground Pore frac- ture> rainfall duration. The surface runoff was positively correlated with rainfall intensity and rainfall duration, and negatively correlated with the porosity of subterranean pores. The underground runoff was positively correlated with rainfall intensity and subsurface pore porosity, and negatively correlated with rainfall duration.