The Research of the Cities’ Temp-Spatial Disparity of Arable Land Use Intensity in Sichuan Province Based on Entropy and ArcGIS

Abstract:

Based on the Entropy method and the complicated landform in Sichuan Province, an evaluation system containing four criteria layers and nine indexes was established in this paper, the four criteria layers are input intensity, utilization intensity, output intensity and sustainability intensity. The arable land use intensities in the year 20062016 has been calculated every five years. The SDE was utilized to reveal the spatial disparities among cities and their changes with ArcGIS10.2. The research suggested that: (1) The arable land use intensities are higher in those cities located in the middle and east of Sichuan Province, mainly on the Chengdu Plain, and the centers of the three SDEs are all in the northwestern Ziyang City, and moved 48 km to southeast for most. (2) Between the year 2006 and 2011, the values of intensity in northeastsouthwestern cities had been higher than those in the other directions, and the disparities had decreased slightly all the way to 2016. (3) The standard deviations in 2006, 2011 and 2016 are 3.286, 2.474 and 1.961 respectively, which suggested a more balanced intensive arable land use between regions in Sichuan Province.