Dynamic Analysis of Land Resource Use Based on GIS Technology

In this paper, a dynamic model of land use is established based on remote sensing (RS) data and geographic information system (GIS) spatial analysis, regarding to the study area, the temporal and spatial dynamics of land use in the four regions of 1998, 2004, 2009 and 2013 are analyzed. The results show that from 1998 to 2013, the total land area of the region is increasing, the area of forest and dry land is decreasing year by year, and the water area, building site and saline land are increasing gradually. The change of land use shows the tendency of early stage fast and later stage slow in time, the trend of dynamic change of cultivated land, river and building site is obvious, and the concentrated area of dry land has a tendency of shrinking to the southwest;the center of gravity of saline land shift to southwest, and the building site is moving to the southwest, those indicating that the salinization degree of land has the trend of inland development. The spatial distribution of soil salinity showing features of slightly in western, seriously in eastern. The agricultural production areas in the southwest are mostly non-saline soils and mild saline soils, most of the soils in the middle part are light and moderate saline soils, the coastal areas are mostly severe saline soils and solonchak. The content of severe saline soil and solonchak account for 77.98% of the total land, thus the soil salinity in the study area is high.