Delimitation of Urban Growth Boundary Based on Ecological Security Pattern
The research area of this paper is a newly developed area located in the western region of the old of Pingdingshan City,Henan Province,with a total area of approximately 295 km2.First,based on the landscape security pattern theory and GIS technology,four critical ecological security patterns were built to manage flood and water resources,prevent geological disasters,conserve biodiversity,and protect cultural heritage and natural landscape resources.The four security patterns were overlaid and integrated into a comprehensive ecological security pattern with three security levels.Second,existing urban construction lands were selected as source of urban growth,with comprehensive ecological security pattern as resistance factors while distance to urban centers,distance to main roads,and neighborhood development intensity as driving factors.Then the minimum cumulative resistance model was applied to simulate urban expansion patterns,which leads to both rigid and flexible boundary.The results showed that:(1) Under high,medium and low security levels,the connectivity and integrity of ecosystem gradually decline and the appropriate scale of construction land amounts to108.69km2,135.43km2,and 153.72km2 respectively; (2) The method of urban growth boundary delimitation based on ecological security pattern illustrated the baseline security pattem for maintaining urban ecological security and basic ecosystem services.It can effectively restrain urban sprawl and guide urban growth toward a more compact pattern.
ecological security patternurban growth boundaryGISminimum cumulative resistance modelPingdingshan newly developed area
国家科技期刊平台
NSTL
万方数据
维普
