CAJ | 학술논문

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.
이중경남천구위례,이용TM요감영상、Arcgis화Erdas연건,운용지도대수원리,채용도상수거전이구진계산,결과표명종1988년도2000년수토류실증강면적위9 605.89 hm2,감약면적위79 947.85 hm2;석막화강도증강면적위15 078.92 hm2,감약면적위12 492.53 hm2.석막화시수토류실장기작용적결과,수토류실시석막화형성과정적계단성표현,이자재성인상존재인과관계,단재생태치리회복적과정중,수토류실감약면적여석막화감약면적적변화불동보,재시간상존재체후관계.조성저충체후적현상,원인시석막화토지생태적회복과정교수토류실토지적장.
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 hm2 and the decreased area is 79 947. 85 hm2 from 1988 to 2000 while the increased area of rocky desertification is 15 078. 92 hm2 and the decreased area is 12 492. 53 hm2. Rocky desertification is a result of long-term effect of soil erosion and soil erosion is the stage of rocky desertification, i. e. there is causal relationship between them. But the area of rocky desertification lightening lags that of soil erosion. The reason for the lag is that the time for ecological restoration of the rocky desertification is longer than that for soil erosion.