崩岗侵蚀地貌分布的海拔高程与坡向选择性-水土保持通报.pdf

31 4 Vol. 31, No .4 2011 8 Bulletin of Soil and Water Conservation Aug . , 2011 1, 2 1 刘希林 , 连海清 ( 1. , 1027 ; 2. , 1027 ) : , , , , , , , : ; ; : A : 1000-288X(2011) 04-0032-0 : P93111 Distribution Choices of Elevation and Slope Orientation of Collapsing Hills LIU X-i lin1, 2 , LIAN Hai-qing1 (1.School of Geograp hy and Planning, Sun Yat-Sen University , Guangz hou, Guangdong 1027 , China; 2. N atural isaster Research Centre, Sun Yat-Sen University , Guangz hou, Guang dong 1027 , China) Abstract: Collapsing hills are w idely distributed in Southern China. In recent years, the survey of collapsing hills has provided a number of data for scientific studies. Based on statistical data, this study recognized the problem of elevation and slope orientation choices of collapsing hills in South China, and considered it might be doubtful. T he explanations for the chioce phenomena have been renew ed. Typical collapsing hill erosion studies in Southern China show that, human activities have been the main influencing factor on collapsing hill distribution, and the relief of collapsing hill erosion is more significant than the elevation. T herefore, the previous explanations of the choices might be not alw ays correct. T he argument that more sun radiation re- sults in more collapsing hills on south slope than on north slope, may be right but only under the condition of no vegetation cover slopes. Statistical errors might be the reason w hy most collapsing hills prefer south slope to north slope. Finally, the study concludes that the influence of hu