Based on the remote sensing data, by using the theory of geographic information images and supported by RS and GIS, the land use/cover change (LUCC) images and the ecosystem services value (ESV) change images about Yuyang District during 1985-2000 were constructed. According to the research of above change images, the character of land use change and its ecological effects in research area were analyzed.The results show that the area of unused land decreased, while the area of rangeland, farmland, construction land, forestland and waters increased from 1985 to 2000, and the increased area of rangeland was the most. The most land use changes was the transformation from unused land to rangeland, whose area was 91.14% of the total changes. The change of land use resulted in the ESV of the research area increased from 1927.34?106 yuan (RMB) in 1985 to 2085.93?106 yuan in 2000, which was up 8.23%. There was 85.99% of the total increased ESV in wind drift sand region where the ESV grew 10.88%, but there was only 14.01% of the total increased ESV in loess hilly-gully region where its ESV raised 3.29%. By the empirical analysis, the way of geographic image was a very effective method in analyzing land use change and ecological effects.
MO Hong-wei, REN Zhi-yuan, WANG Qiu-xian
. Images Analysis of Land Use Change and Its Eco-environmental Effects in Wind Drift Sand Region——A Case Study on Yuyang District of the Northern Shaanxi Province[J]. SCIENTIA GEOGRAPHICA SINICA, 2008
, 28(6)
: 770
-775
.
DOI: 10.13249/j.cnki.sgs.2008.06.770
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