基于GIS和RS的喀斯特石漠化时空变化图谱分析——以贵州省罗甸县为例

Atlas Analysis of spatiat-temporal evolution of Karst Rocky Desertification in Luo Dian County Based on GIS and RS Technology——Taking Luodian County of Guizhou Province as an Example

[目的]研究贵州省罗甸县喀斯特石漠化时空变化。[方法]运用地学信息图谱的理论与方法，基于Erdas9．2和ArcGIS9．3的软件平台，对2005和2014年罗甸县的喀斯特石漠化进行时空变化图谱分析。[结果]2005～2014年石漠化等级变化很大，其增长最多的是轻度石漠化，增加面积为264．38km2，占总面积的8．80％，主要来源于中度石漠化、轻度石漠化；其次为中度石漠化，增加面积为89．04km2，占总面积的2．96％，主要来源于轻度石漠化；石漠化等级图谱单元减少最多的是无明显石漠化；潜在石漠化和轻度石漠化的类型属于最不稳定的等级类型。[结论]2005～2014年罗甸县石漠化等级由轻度石漠化逐渐向强度石漠化演变，石漠化程度加重。

[ Objective ] The research aimed to study spatial-temporal evolution in karst rocky desertification areas of Guizhou Province. [ Method] Based on the software platform of Erdas9.2 and ArcGIS9.3, this research used Tupu of geoinformation as a theory and method, analysed Tupu of 2005 and 2014 described spatial-temporal evolution in Karst rocky desertification area at LuoDian County. [ Result] The change of rocky desertifi- cation degrees are very greatly from 2005 to 2014. The biggest increases was mild rocky desertifieation, its increasing area was 264.38 km2, ac- counted for 8.8% of the total area, which mainly derived from moderate rocky desertification and mild rocky desertification. The second increases was moderate rocky desertification, its increasing area was 89.04 km2, accounted for 2.96% of the total area, which mainly derived from mild rocky desertification. Tupu units of rocky desertification degrees reduced the most is no obvious rocky desertification. The types of potential rocky desertification and mild rocky desertification belong to the most unstable degrees. [ Conclusion] Accordingly, from 2005 to 2014 the strength of Luodian County＇ s rocky desertification degrees have been aggravated and gradually changed from mild rocky desertification to intensity rocky de- sertification.