A Study On Urban Expanding Of The Suining Main City In The Recent Twenty Years

This dissertation, is using RS and GIS technology, and selects1988,1993,2007(TM) and2001(ETM) in four different time remote sensing imageas the date foundation, combined with social and economic statistical data to extractedfour outlines the main city boundaries in the SuiNing main city; Selection of urbanexpansion in the characterization of common indicators: extended speed、elasticityratio of extended size-population、expanding space eight-bit and buffer, study onurban land use in quantitative and spatial quantitative analysis; And driven to the maincity expansion of all kinds of main influence factor study from naturalenvironmental factors, population, transportation, policy-oriented socio-economicfactors and the analysis of the correlation between main urban area. The study drewthe following conclusions:(1) Information extraction in the study area, through the same period in threeways, verified by random sample sites level accuracy: NDBI78%, and RRI, DBI upto81%, so DBI index used in this paper to extract main city information.(2) Through quantitative analysis found in the study area, for nearly20years themain city area expansion is extremely obvious,7532hm2of the581.26hm2extensionfrom1988to2007, an increase of about13times.And the urban expansion elasticitycoefficient is high, there are non-agriculture population increases less than the urbanarea expanded, prone to "pie" unreasonable scaling issues.(3) Combining space eight-bit and buffer analysis concluded that the study area,the land is flat, easily accessible location for major expansion1988-1993expansionconcentrated in the Southeast and is the main city in the North;1993-2001concentrated in the Southeast, Northwest;2001-2007focuses on due East, Southeastand Northwest; West, Southwest, and just south of the weakest due to topographicalconstraints extension, which is expanding in southern strength greater. At the same time, in the region1km-radius divided by six laps,1988-1993expansion focused onthe main city buffer radius,1km,2km,3km;1993-2001expansion spread outside,focus4km,5km;2001-2007overall expansion accelerated and internal expansionindex increase, spread in this phase focused on the transportation convenience, theterrain is flat,4km,5km,6km.(4) After extended drive from factor analysis in the study area,1988-1993downtown expansion mainly under the influence of natural factors such as topography,rivers; The1993-2001terrain, traffic impact;2001-2007, the leading driving factor forpolicy, transportation and other socio-economic factors. At the same time, through thedowntown area and major driving factors of linear regression analysis, multivariatelinear regression model and establish them, and to validate the model, model was setup and has a significant linear correlation relationship between them.