Characteristics of soil and water loss and its influencing factors on slope scale in rocky mountain area of Beijing
Fan Dengxing, Yu Xinxiao, Jia Guodong, Wang Henian
Key Lab. of Soil & Water Conservation and Desertification Combating, Ministry of Education,College of Soil and Water Conservation, Beijing Forestry University, 100083,Beijing,China
Abstract In order to reveal the regular pattern of water and soil losses in different regions,the partial correlation relationship between soil erosion and its main influencing factors including rainfall,vegetation coverage and slope was discussed based on observation data of runoff plots in rocky mountain area of Beijing. The results showed that runoff was mainly affected by rainfall and maximum 30 min rainfall intensity; erosion was highly influenced by runoff, vegetation coverage and maximum 30 min rainfall intensity. For rainfall factors,runoff was highly influenced by rainfall,rainfall duration and maximum 30 min rainfall intensity,and erosion,however,was highly affected by maximum 30 min rainfall intensity. The result showed a significantly negative correlation between soil erosion and vegetation cover,that is,the annual runoff and erosion in the runoff plots decreased as vegetation coverage increased. The annual runoff and erosion in the runoff plots firstly increased,and then decreased with increasing slope gradients. Shrub and grass have obvious soil and water conservation effects. Development of vegetation restoration has important implications for improving the ecological environment and controlling soil erosion in rocky mountain area of Beijing.
FAN Deng-Xing,YU Xin-Xiao,JIA Guo-Dong, et al. Characteristics of soil and water loss and its influencing factors on slope scale in rocky mountain area of Beijing[J]. SSWCC, 2014, 12(2): 24-28.
