Research on GIS-Based on Methods of Land Use Eco-Security Evaluation in the Typical Agro-Pastoral Zone
In this paper, a case study was conducted in the Ongniud Banner, Inner Mongolia, agro-pastoral zone of North China.According to the factors of eco-insecurity and the purpose of land use eco-security evaluation of the studying area, we chose several indexes from the security of land desertification and security of soil erosion, constructed the safe composite index of the eco-security and the method of evaluation. Land use eco-security evaluation was carried out in the study area on the basis of GIS. Main results from this study are as follows: (1)The secure status of land desertification in the studying area got better from 1985 to 2000,but the area of extreme insecure and insecure region of land desertification was still heavy, nearly accounting for 30％ of the whole area; (2)The soil erosion in the studying area between 1985 to 2000 did not become better, the central and west regions still remained the serious area of soil erosion, and strong water and soil conservation measures must be taken; (3) the average ESSI in this region is not leveled at secure, figuring at 2.7 in 1985 and 2.66 in 2000. The order from the greatest to the smallest between 1985 and 2000, which was about the distributing areas of security grades, was less ecological secure region,ecological extreme insecure region, ecological relative secure region, ecological insecure region and ecological secure region.
eco-security evaluation land use GIS agro-pastoral zone
Hua-lin Xie Xiao-hong Su
College of Environment and Resources, Fuzhou University, Fuzhou city, Fujian province, 350108,P.R.China
国际会议
北京国际地理信息系统学术讨论会第七届会议（7th International Workshop Geographical Information System
北京
英文
500-506
2007-09-14（万方平台首次上网日期，不代表论文的发表时间）