The Southern Loess Plateau Of Land Use Dynamic Changes Of The Terrain And The Administrative Center Of Influence

Land use/land cover change (LUCC) is the current international and domestic scholars in the hot area for revealing man-land relationship is significant evolution. Land use changes in a variety of natural and human factors together under the influence, the quantitative analysis of land use changes caused by various factors, for an important role in promoting regional development. This example of Loess Plateau in the southern region, using 1980,1996,2005, three TM remote sensing image, and using geographic information systems theory and method, analysis of the Loess Plateau in the southern region the overall change in land use characteristics, and take YunCheng and ChangZhi as typical areas, systematic and comprehensive analysis of the terrain and administrative center on the role of land-use changes. Through research, this article was the following conclusions:1. The overall land use change in the southern Loess Plateau Characteristics(1) 1980-2005,25 years, the Loess Plateau in the southern area of each land use type, great changes have taken place, in which the largest amount of cultivated land change,25 years to reduce the 1443.22km2, followed by the construction land, an increase of 1238.29km2. Increase in the rate of construction land is also the largest, is 1.393 percent, reducing the maximum rate for the unused land, was 0.874%. The largest conversion of unused land, amounting to 0.973 percent, followed by water, was 0.577 percent, ranked third for the land, the conversion rate of 0.102 percent, the minimum conversion rate of construction land, only 0.005%.From the perspective of land use between 1980-2005, the Loess Plateau, south of integrated land use dynamic degree of 0.085%, of which arable land, woodland, grassland, respectively, of land use dynamics of 0.073%,0.049%,0.078%, were small in integrated land use dynamic degree; water, construction land and unused land in the land use dynamics were 0.589%,0.597%,0.602%, higher than the integrated land use dynamic degree. The greatest degree of land use of unused land, the smallest for the land, the former for the latter's 8.25 times.(2) From the cities of the situation,25 years, the greatest change in the Loess Plateau in southern city of Yan'an City, followed by Weinan City, Pingliang City, the smallest change was in Taiyuan, followed by Luliang City, Tongchuan City. Integrated land use dynamic degree of order varies with the variation, the consolidated dynamic degree, the biggest for the Jiyuan City, followed by Yangquan City, Zhengzhou City, the smallest for Luliang, followed Linfen City, Jincheng.2. Terrain on the impact of land use change(1) Loess Plateau in the southern region of Terrain on the spatial distribution of land use constraints play a very prominent role. Arable land, water and construction land is mainly distributed in low-topography areas, and other land types with the landscape-level distribution advantage index increased volatile.(2) The terrain around the class on the Loess Plateau in the southern region has a greater impact on the transfer of the role of different types of terrain region the transfer of land use there is a big difference in the relative velocity around the class of transfer on the terrain gradient distribution pattern of significant change. Overall, the transfer of land and water, mainly in low-topography areas; the transfer of forest land is mainly distributed in areas of high terrain; grassland mainly in the transfer of the topographic region.(3) Terrain on the Loess Plateau in the southern region the rate of change of land use has a great influence on the overall rate of change of land use show "higher levels decline with the terrain" trend, low terrain area is greater than the rate of change of land use with high terrain the rate of change of land use area.3. The administrative center of the impact of land use change(1) The administrative center of the buffer within the scope of its spatial distribution of land-use space to attract and have a strong effect of spatial variation.(2) The administrative center of the building site has a great role in promoting growth.(3) The administrative center of the transfer of different land use types have different degrees of stimulation effects.(4)The administrative center of the land use within the buffer zone the rate of change stimulated by the administrative center and the regional effects of land supply factors of the dual constraints.The features and innovations of the article are the following:(1) Constructed the topographic index by DEM, then constructed the terrain distribution advantage index, the transfer distribution index, the rate of landuse changing and other indicators with non-dimensionless, to avoid the impact of classfication of the terrain result to the non-equal area, and reflected the distribution of each landuse type of terrain accurately, got the influence of the topographic factor on the landuse types.(2)Using the buffer and overlay analysis techniques and methods, to analyze the influence of administrative center on landuse change in Southern Loess Plateau systematically and comprehensively.