Evolution of coordination degree of eco-economic system and early-warning in the Yangtze River Delta

摘要: On the basis of Landsat TM data Yangtze River Delta (YRD) Economic Zone in 1991, 2001 and 2008, this article, taking 90 counties region as study units, built spatial transformation models, ecosystem service value (ESV) coordination degree eco-economic system (CDES) models. With aid ArcGIS9.3, mass grid vector has been processed for analyses. ESV CDES indexes have demonstrated relationship between economic development eco-environment its evolution characteristics researched areas. Furthermore, also used functional zoning pattern recognition. Some results can be shown follows. Firstly, since land use YRD greatly changed: urban area increased primarily from original paddy land, dry grassland, garden plot other land. Secondly, model proved deterioration trend ecological 1991 to slower degradation during 2001–2008. Also, it is illustrated that land-use conversion water field could cause great damage stabilization. Thirdly, GDP central southern parts higher than northern part 1991. growth rate 1991–2001. This 2008. Fourthly, categorized into 12 types subregions terms index. According characteristic index area, conflict with low which located surrounded by eco-coordinated areas high values. illustrates a core-periphery structure exists YRD. During 1991–2001, implied convergent area; while gradually stepped coexistence divergent Finally, paper analyzed five YRD, including initially degrading zone, coordinative continuously coordination-declined zone coordination-promoted based on patterns. And these recognized model.