关中平原东部渭河洪泛区土地利用变化研究

Analysis on land use and its changes in the floodplain of the Weihe River in eastern GuanzhongPlain

目的研究渭河下游洪泛区2002年和2010年的土地利用类型及其变化特征。方法采用非监督和监督分类相结合的方法分析Landsat 7ETM+数据。结果 2002至2010年,耕地始终占据绝对优势,面积比重最大,但面积总量呈下降趋势;随着城市化进程的加快,建设用地增加迅速;园地比重增加,说明了农业产业结构的变化;林地、草地面积、比重略有减少。结论重视区域经济发展的同时,应重视保护耕地资源。

Objective-To analyze the land use and its pattern changes in the floodplain of the downstream of Weihe River in 2002 and 2010. Methods-Landsat 7 ETM＋data areanalyzed by combining unsupervised and supervised classifications. Results-Arable land has always been predominant, but the total area is on the decline although the percentage of total area is large. With the acceleration of urbanization, the construction land increased rapidly. The proportion of garden is increasing because of the optimization of the structure of agricultural industry. Conclusion-Although economic growth is the focus of regional development, attention should be paid to the protection of arable land resources at the same time.