基于“RS”的毕节地区石漠化变化趋势分析

Changes of Rocky Desertification in the Bijie Based on "RS"

【目的】通过对毕节地区近年来的石漠化变化情况进行分析,以期能为该区的石漠化治理提供参考。【方法】以2006年、2008年、2010年的遥感影像数据为基础,采用ENVI软件进行分析处理,从中提取石漠化信息,得到石漠化面积和分布情况。【结果】该区的石漠化主要分布在威宁、大方等县,2010年,毕节地区的石漠化面积达到6 211.62km2,比2006年减少333.50km2,石漠化以年均1.32%的缩减率得到控制。【结论】由于气候、人为等因素的影响,毕节地区的石漠化在局部上仍呈扩展之势,但是在石漠化治理工作的大力开展下,石漠化已基本得到控制,并正向逐年好转的趋势发展。

【Objective】 The aim of this study was to analyze the recent changes of rocky desertification of in the Bijie region.Our paper could provide a nice reference for combating rocky desertification.【Method】 ENVI software was used to analyze remote sensing image data of Bijie in 2006,2008 and 2010.The area and distribution of rocky desertification were compared between years.【Results】 Rocky desertification were mainly distributed in Weining,Dafang and other counties.The area was 6 211.62 km2 in 2010,which was 333.50 km2 larger than that of 2006.Rocky desertification has been controlled with a annual reduction rate of 1.32%.【Conclusion】 Due to climate,man-made and other factors,rocky desertification showed a expansion in some areas of Bijie.However,it has been controlled basically with rocky-desertification-control projects,and improved year by year.