|关键词: 遥感和GIS 耕地 驱动因素 和田市
|Study on the Change of Farmland and its Driving Factors in Recent 28 Years of Hotan City Using Remote Sensing and GIS
nuerbiye aobuliaisan, bumairiyemu maimaiti
|In arid regions, cultivated land is the base of agricultural production, ecological environment protection and social stability. Mastering the change of cultivated land is an important basis for rational allocation and utilization of various types of land resources, effective protection of cultivated land and sustainable development. This study takes Hotan city, a typical oasis city in southern Xinjiang. Based on Landsat remote sensing images in 1990, 2000, 2010 and 2018, the spatiotemporal changes of cultivated land in Hotan city were analyzed by using the dynamic attitude of cultivated land change and the transfer matrix. The Pearson correlation analysis method was used to analyze the influencing factors of cultivated land change. The results show that: (1) From 1990 to 2018, the area of construction land in Hotan city increased by 58.68km2, an increase of 34.39%; The area of cultivated land decreased by 47.06km2 or 27.58%. The area changes of forest land, water area and unused land are relatively small, which are 9.23km2, -7.5km2 and -13.35km2. (2) During the study period, 38km2 of cultivated land was occupied by urban construction land, and cultivated land contributed the most to urban expansion. (3) The Pearson correlation analysis results show that cultivated land change has a strong negative correlation with population and GDP. Therefore, population growth and economic development are important reasons for the decrease. At the same time, natural factors and policy factors have a certain role in promoting and protecting cultivated land change. The increase of population size and economic growth will lead to a substantial increase in the area of construction land, which will eventually be reflected in the increasingly significant expansion of urban area, which will eventually be achieved by occupying a large number of limited cultivated land.
|Key words: Remote sensing and GIS farmland driving factor Hotan City