Analysis Of Ecological Vulnerability In Northeast China International Basin Based On Remote Sensing Technology

Ecological vulnerability(eco-environmental vulnerability)is the sensitivity and self-healing ability of the ecological environment to external disturbances under a certain time and space.It is the result of the joint action of human socioeconomic behavior and natural conditions.With the occupancy of large amounts of natural resources and the increasing population,the ecosystem has been seriously threatened.When the degree of destruction exceeds its own repair capacity and the current degree of restoration of humanities,socio-economic and technical capabilities,the carrying capacity reaches the limit,which will certainly cause the ecological resources of the area to be exhausted,and the natural environment will make corresponding Self-healing brings unimaginable consequences.In order to maintain the harmonious coexistence between humans and nature,the ecological environment has attracted worldwide attention.Due to the particularity of cross-border,there have been few studies on the ecological vulnerability of this research unit in the cross-border watershed.This article takes the Northeast China International Watershed as a research area,including the Yalu River Basin,the Suifen River Basin,and the Tumen River Basin with Heilongjiang River Basin as the main body.It crosses the four countries of China,Russia,Mongolia,and North Korea,and uses remote sensing technology to evaluate the ecological vulnerability of the research area The main research results are as follows:(1)Created through the analysis of long-term serial multi-source remote sensing data(NDVI data,reflectance data,land use data,DEM data,lighting data,soil moisture data,precipitation data)and non-remote sensing data(protected area data)10 small indicators and 4 large indicators were formed to form an assessment system to analyze the ecological vulnerability of the study area.Based on the obtained data,the ecological and environmental factors of the study area were analyzed,and corresponding small indicators were established.The small indicators were merged into four major indicators: exposure index,sensitive index,adaptability index,and vulnerability index,and the ecological vulnerability was constructed.Evaluation model to establish an indicator system for ecological vulnerability assessment.(2)The results show that the ecological vulnerability of the study area fluctuates between-0.5 and-0.2;the trend changes from west to east,the vulnerability index becomes smaller and smaller,and the vulnerability of the eastern region gradually decreases.The overall vulnerability index of the international watershed showed a trend of increasing first and then decreasing from 2001 to 2018.(3)This article analyzes the ecological exposure,ecological sensitivity,and ecological adaptability by combining different factors.The changes of different factors will have different effects on the index,and find the relationship between it and ecological vulnerability.The ecological vulnerability of China is analyzed from the perspective of temporal and spatial differences.Based on the assessment results of ecological vulnerability,the study area is analyzed.While promoting economic development,it focuses on ecological construction and adjusts the economic structure according to the ecological status to ensure the green sustainability of the study area.Developmental.