基于RS和GIS的沙化土地动态变化分析——以神木县研究区为例

利用RS和GIS的空间分析技术，以TM遥感影像为主要信息源，通过目视解译的方法提取研究区沙化土地动态变化数据，结合现地调查资料对研究区沙化土地动态变化情况进行分析。结果表明:研究区沙化土地总体呈现出好转的态势，其中以流动沙地减少最为明显，流动沙地主要转化为固定和半固定沙地。分析认为，国家与地方在防沙治沙和环境治理方面实施的法律法规为沙化土地好转提供了政策保障；各项生态建设工程的实施和人们保护生态环境意识的增强，对沙化土地的好转起到了推动作用；区域经济持续稳定的发展为沙化土地好转提供了有力的资金支持。

Analysis on the Dynamic Variations of Desertificated Land Based on RS and GIS-A Case Study of Shenmu County

Using space analysis technologies RS and GIS,and taking the remote sensing image as the major source of information,an analysis is performed on the dynamic variations of desertificated land of the study area,with the data acquired by virtue of visual interpretation as well as the field survey data.The results show that the desertificated land of the study area is generally in an improved situation,among which the most obvious improvement is the area diminution of the shifting sandy lands,which mainly conver...