Gan Yi Xian, Dai Quan Hou, Fu Wen Bing, Yan You Jin, Peng Xu Dong
College of Forestry, Guizhou University, Guiyang 550025, China.
Guizhou Shengtai Engineering Consulting Co. Ltd., Guiyang 550002, China.
Ying Yong Sheng Tai Xue Bao. 2016 Sep;27(9):2754-2760. doi: 10.13287/j.1001-9332.201609.025.
Studying soil erosion process and mechanism on Karst slopes has important practical and guiding significance for controlling soil and water loss and preventing rocky desertification in Karst region. The soil erosion process and characteristics on Karst slopes were explored by artificial simulation rainfall experiment. Results showed that the soil and water loss largely came from underground hole (crack) when rainfall intensity was in the range of 30 and 50 mm·h, while soil erosion occurred primarily in soil surface when rainfall intensity was 80 mm·h. Surface runoff modulus and transport rate both increased with increasing slope, and decreased with increasing underground hole (crack) degree. The underground runoff modulus varied from 0.37 to 0.52, and the underground transport rate changed from 0.81 to 1.93 g·min. They both decreased with increasing slope while increased firstly and then decreased with increasing rainfall intensity.
研究喀斯特坡面土壤侵蚀过程及机制，对控制喀斯特地区水土流失、防治石漠化具有重要的实践和指导意义。通过人工模拟降雨试验，探讨了喀斯特坡面土壤侵蚀过程及特征。结果表明，当降雨强度在30～50mm·h时，水土流失主要来自地下孔洞（裂隙），而当降雨强度为80mm·h时，土壤侵蚀主要发生在土壤表层。地表径流模数和输沙率均随坡度增大而增大，随地下孔洞（裂隙）度增大而减小。地下径流模数在0.37～0.52之间变化，地下输沙率在0.81～1.93g·min之间变化。二者均随坡度增大而减小，随降雨强度增大先增大后减小。
