Abstract
This article supported by remote sensing and GIS software.Using NDVI,DMSP-OLS and multi-temporal TM images covering the period 1998—2010 of Shiyang River Basin.We put forward the Land-Cover Index( LCI) based on the Vegetation-Impervious Surface-Soil( V-I-S) theory of urban land-cover system raised by Ridd and Calculate it.Then we use wavelet analysis,semivarigram and lacunarity analysis to Study the temporal and spatial scales of LCI.In order to find out the spatial distribution and evolvement rules of LCI in the last decades.Finally we attempt to utilize of the regression fit equation to identify the drive mechanism of influencing factors of land-cover change.The conclusions are obtained as follows: LCI distribution restricted by DEM in large area.The value of LCI high area( urban area) increasing,and the value of LCI low area( vegetation cover area) declining since 2002.That the level of regional urbanization significantly improved,vegetation cover slowly got better.And both of them gradually formed clusters.The level of regional urbanization greater impact by human factors,vegetation cover greater impact by natural factors simultaneously.
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