宁夏中部干旱带土地利用变化研究

Study on land use change in the drought region of middle Ningxia

以宁夏中部干旱带为研究对象,选取1989、1999、2006和2010年遥感影像解译的后期数据,系统分析宁夏中部干旱带土地利用变化的速度、方向及空间格局.结果表明:1989—2010年宁夏中部干旱带土地利用结构有很大变化,耕地面积和未利用地面积显著减少;从土地利用变化速度和利用程度来看,变化最快的是建设用地,其次是林地;从土地景观格局来看,宁夏中部干旱带土地利用多样性指数和均匀度指数逐年提高,土地利用结构逐渐转化为良性,但同时区域之间存在明显差异,人为活动影响土地利用景观格局的变化.

Taking the arid zone in central Ningxia as the research object, the later data of remote sensing image interpretation in 1989, 1999, 2010 and 2010 were selected to systematically analyze the spatial pattern of land use change and the spatial pattern of land use change in arid zone of central Ningxia. The results showed that the land use structure of arid zone in central Ningxia had a great change from 1989 to 2010, and the area of cultivated land and unused land area decreased significantly. From the point of view of land use change speed and utilization level, the most rapid change was the construction land, Followed by woodland. From the view of land landscape pattern, the land use diversity index and uniformity index of arid zone in central Ningxia increased from 1989 to 2010, and the land use structure was gradually transformed into benign, while significant differences in human activities affect the land use landscape pattern changes.