基于多源数据的多尺度石漠化时空变化研

Taking Huaxi District in Guizhou Province as the research area, with the help of RS and ArcGIS software platforms, through the comparative analysis of three phases of remote sensing data in 2000, 2010 and 2017 in the research area, the spatio-temporal change characteristics of karst rocky desertification in this area in the past 17 years have been studied. The results show that from 2000 to 2017, the improvement and intensification of karst rocky desertification in Huaxi District coexisted, but on the whole, the rocky desertification still developed in an improving trend; from 2000 to 2010, the area of moderate rocky desertification had been increasing, but from 2010 to 2017, the area of moderate rocky desertification was decreasing, and from 2000 to 2017, the area of severe rocky desertification had been decreasing, with a decrease of 123.84 km2, and the areas of non-rocky desertification, potential rocky desertification and mild rocky desertification had been increasing in the past 17 years, with an increase of 5.98 km2, 34.96 km2 and 120.47 km2 respectively; the occurrence area of rocky desertification gradually transitioned from the western part of the research area to the remote township areas, and the severe rocky desertification areas in 2010 and 2017 mainly evolved from the mild and moderate rocky desertification areas in the previous periods, so the mild and moderate rocky desertification areas should become the key points of governance.

以贵州省花溪区为研究区域，借助ＲS 和ArcGIS 软件平台，通过对研究区2000 年、.2010 年和2017 年三期遥感数据的对比分析，研究了该地区近17 年来岩溶石漠化的时空变化.特征。结果表明: 从2000 年到2017 年，花溪区的岩溶石漠化改善和加剧现象同时存在，但整.体石漠化还是向改善的趋势发展; 从2000 年到2010 年中度石漠化的面积一直在增加，但在.2010 年到2017 年中度石漠化的面积在减少，从2000 年到2017 年强度石漠化的面积一直在减.少，减少了123．84 km2，无、潜在及轻度石漠化在过去17 年面积一直在增加，分别增加了.5．98 km2、34．96 km2和120．47 km2 ; 石漠化的发生区域主要由研究区的西部逐渐过渡为边远的.乡镇地区，且2010 和2017 年的强度石漠化区域主要由之前时期的轻度和中度石漠化区域发.生演变而来，故轻度和中度石漠化地区应成为治理的重点。