摘要
针对泸沽湖地区水土流失的问题,结束GIS地理空间信息分析技术,从高程、坡度、植被覆盖度等因素考虑,对区域的单个影响因子进行水土流失敏感度评价,并结合单一评价结果进行了区域水土流失敏感性的综合评价。研究结果表明,泸沽湖地区水土流失敏感性区域主要集中在植被覆盖度30%~45%、坡度15°~35°、高程+800~+1400 m内,主要以轻度和中度等级为主,轻度以上水土流失敏感区占总面积的67.41%,敏感区面积达到812.63 km~2,轻度以上侵蚀面积表现出先增加后下降的单峰分布,强度、极强、剧烈水土流失区较小,图斑破碎。后续水土流失防治中,主要以水土流失敏感度集中区域作为核心治理地带。
In view of the problem of water and soil loss in Lugu Lake area,the GIS geospatial information analysis technology was completed.Considering the elevation,slope,vegetation coverage and other factors,the water and soil loss sensitivity of a single influencing factor in the region was evaluated,and the regional water and soil loss sensitivity was comprehensively evaluated based on the single evaluation result.The research results showed that the sensitive areas of water and soil loss in Lugu Lake area were mainly concentrated in the vegetation coverage of 30%~45%,slope of 15°~35°,and elevation of+800~+1400 m.They were mainly of light and medium grade.The sensitive areas of water and soil loss above light level account for 67.41%of the total area,and the sensitive area reached 812.63 km~2.The area of erosion above light level showed a single peak distribution that increases first and then decreased.The area of water and soil loss of intensity,intensity,and severity was small,the pattern was broken.In the follow-up prevention and control of water and soil loss,the area with concentrated water and soil loss sensitivity was mainly taken as the core control zone.
作者
尹嘉奇
Yin Jiaqi(Sichuan Environmental Information Center,Chengdu 610093,China)
出处
《能源与环保》
2022年第12期143-146,152,共5页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
