Abstract
Based on the "pressure-state-response"(PSR) model,in this paper the Changwu,Binxian,Yongshou,Chunhua,Liquan and Jingyang counties in middle and lower reaches of the Jinghe River Basin are selected as the study area to carry out the assessment and analysis of ecological security.The results show that there are some differences in ecological security between different regions,and the ecological security in the south of the study area is higher than that in the north.In a viewpoint of the districts,the ecological security index is the highest in Jingyang County and the lowest in Changwu County;in a viewpoint of landform types,the ecological security in the loess platform areas in the south of the study area is higher than that in the hilly and ravine areas in the north.According to the ecological security categorization,the ecology is in a security state in Jingyang County,a relatively security state in the Chunhua,Yongshou,Liquan and Binxian counties,but an insecurity state in Changwu County.
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