A Research To The Measurement, Mechanism And Counter Measures Of Urban Sprawl Of Changchun

Urban sprawl happened in the United States at the earliest,which is a sDecialphenomenon in the suburbanization process in late 1 930s Urban sprawl has manv negative effects of social,economic ecological environment,and serious impact on urban sustainable development With rapid economic development and accelerating the pace of urballization．man),cities began tO sprawl phenomenon In recent years:Changchun as an important centerfor four cities in northeast China．hax e obvious''pie"type of urban sprawl phenomenOn Inthis paper,we chooses 1993．2000:2005,201 0 remote sensing image data and many years of statistics of Changchun city,use of RS image anal?,sis and GIS spatial analysis functions．make urban sprawl dynamic analysis and the actual measurement in nearly 20 Years,and Dutsforward the mechanism which lead the spread of cit)l_Finally．we prODose thecountermeasures ofurban sprawlSince the nineties of last century．Changchun achieve rapid development of urbane。onomy along with the zone construction．real estate de,,elopment and strateg?,ofrevitalizing old industrial of northeast,and urban sprawl phenomenon has emerged Currentlv．comprehensive volume rate．population density,compact index of built—up areas．intensiv0land use degree of zone,mixed land use degree,and matching of living space had showedobvious features of urban sprawl．Urban sprawl has resulted in reduction of arable land inurban fringe areas,severe traffic congestion,time and space costs of travel．environmentaldegradation and other issues．The mechanism of urban sprawl maim3r as follows:the naturalgeographic envlromnent,economic development,population growth．development zon。construction,fringe real estate development,transportation infrastructure and motorized．roleof government behavior．How to be effective to curb further deterioration of urhan sDrawl．Changchun should have be establish the scientific concept of development．achieve economicgrowth from extensive to intensive changes:drawing on countermeasures of western cOuntries．perfect the land system:and improve the urban Planning science,in 0rder to achievesustainable urban development...