Ecological Security Comprehensive Evaluation and Spatial-Temporal Evolution Based on Grey Correlation Model in Shandong Sec-tion Along the Yellow River Area
Taking Shandong section of the Yellow River as the research area,using the PSR model on ecological security index system,based on the entropy method and grey correlation model,the paper conducted the ecological security comprehensive evaluation and spatial-temporal evolution analysis from 2000 to 2018 in Shandong section.The results showed that:the overall trend of ecological security level is rising in fluc-tuation and ecological security changed from unsafe state to safer state.In subsystems the ecological pressure is more and more increasing,the ecological state and the ecological response is more and more raising with the largest increase of the ecological response,but the increasing de-gree of ecological state and ecological response is higher than ecological pressure.In municipal scale the overall showed a trend of increase of ecological security level in 17 cities and evoluted in reciprocal N shape with downward-increasing-downward trend.The general safe is the main-ly type of ecological security level with few high grade which indicated the ecological security would not be optimistic in Shandong section.There were significant differences of the evolution trends of ecological security in the 17 cities,with changing showing a transfer to eastward and northward areas.The spatial evolution of ecological security presented spatial pattern of north high south low and east high west low,the high type spread from the east coastal area to north area of Shandong section and the close safe appeared in south-central Shandong,north-west Shandong.Finally,the essay put forward optimization path to promote the ecological environment quality from aspects such as ecological envi-ronment governance and protection,optimal regulation of three major spaces and transformation and upgrading of economic structure.
Ecological security evaluationGrey correlation modelSpatial-temporal patternThe region along the Yellow RiverShandong sec-tion
万方数据
维普
