西南岩溶区水土流失与石漠化的变化关系研究——以重庆南川岩溶区为例

以重庆南川区为例，利用TM遥感影像、Arcgis和Erdas软件，运用地图代数原理，采用图像数据转移矩阵计算，结果表明从1988年到2000年水土流失增强面积为9 605.89 hm2，减弱面积为79 947.85 hm2；石漠化强度增强面积为15 078.92 hm2，减弱面积为12 492.53 hm2。石漠化是水土流失长期作用的结果，水土流失是石漠化形成过程的阶段性表现，二者在成因上存在因果关系，但在生态治理恢复的过程中，水土流失减弱面积与石漠化减弱面积的变化不同步，在时间上存在滞后关系。造成这种滞后的现象，原因是石漠化土地生态的恢复过程较水土流失土地的长。 

Relationship between soil erosion and rocky desertification in Southwest China karst region -A case in Nanchuan karst area, Chongqing

The paper takes Nanchuan in Chongqing as an example and obtains change relationship between soil erosion intensity and rocky desertification via TM remote sensing image and Arcgis as well as Erdas software on the basis of map algebra principle to transfer matrix of image data.The results show that the increased area of soil erosion is 9 605.89 hm~2 and the decreased area is 79 947.85 hm~2 from 1988 to 2000 while the increased area of rocky desertification is 15 078.92 hm~2 and the decreased area is 12 492.5...