Abstract:

Ecological security pattern is significant for guiding the spatial allocation of the urban and rural construction land.Six ecological security elements,including terrain conditions,geological hazards,soil erosion,biological protection,the protection of general water body and protection of Taihu Lake,were selected as the ecological constraints for the spatial expansion of urban and rural construction land.The integrative ecological security in Huzhou city was evaluated using the GIS spatial analysis tools based on the principle of buckets effect,and the spatial distribution map of ecological security patterns,which were classified as security region,critical security region,less insecurity region and insecurity region,was produced.According to the map of current urban and rural construction land distribution,the ecological security pattern map of current urban and rural construction land in Huzhou city was generated.According to the basis for determining the boundary of urban and rural construction land based on ecological security levels,the spatial distribution map of preferential construction region,conditional construction region,restrictive construction region and prohibitive construction region for urban and rural construction land was produced based on the comparison between the ecological security pattern and the urban and rural construction land,and then their areas were calculated respectively.And then the boundary of urban and rural construction land based on ecological security pattern in Huzhou city,including potential boundary,extended boundary,neatened boundary and prohibitive boundary,were delineated.The results will benefit to the spatial optimization allocation of the urban and rural construction land and differentiated management