关键词: 水土流失重点防治区;水土流失重点预防区;岩溶石漠化区;蒙自市;云南省;

Abstract: In order to provide a basis for scientific planning of soil and water conservation in karst rocky desertification area, the key control areas of soil and water loss were divided at county level. On the basis of provincial key areas of soil erosion prevention and control, in the scope of county scale, taking small watershed as a unit, according to the overall consideration of the current situation of soil erosion prevention and control needs, we divided the key areas of soil erosion prevention and control in Mengzi City by using qualitative and quantitative analysis method. The index system of key soil and water loss control area in Mengzi City was constructed and the index values were determined. The key soil and water loss control area at provincial level in Nanxi River was divided into small watershed, and a key soil and water loss control area at county level was divided. The results can provide scientific basis for water and soil conservation planning and soil erosion prevention and control in Mengzi City.

Key words: key prevention and controlled area for soil and water loss; key prevention area for soil and water loss; Yunnan Province; Mengzi City