| Technology Application |
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The Spatial Pattern of Landcover in the Drawdown Area of Danjiangkou Reservoir |
| LI Wei-ping1,2, ZENG Yuan1, ZHANG Lei1, YIN Kai1, YUAN Chao1, WU Bing-fang1 |
1. Institute of Remote Sensing Applications,Chinese Academy of Sciences,Beijing 100101,China;
2. China Map Publishing Group, Beijing 100055, China |
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Abstract In this paper, the location of the submerging area at different water levels (150 m,160 m,170 m and 172 m) in Danjiangkou reservoir basin was detected based on the DEM data,and the landcover below 172 m level was obtained by using object-oriented classification approach based on RapidEye and Landsat-5 TM data. The authors analyzed not only the spatial patterns of the landcover in the drawdown areas but also the impact factors. The results show that the acreage of the drawdown area at 150-160 m,160-170 m and 170-172 m level is 232.0 km2,242.6 km2 and 43.1 km2 respectively. The acreage of the cultivated land is the largest,accounting for about 50% in every drawdown area. In addition,the acreage of the bare land is larger at the low water level,while that of the forest is larger at the high water level. Dynamic scheduling and slope constitute the impact factors on the spatial pattern of landcover. Both have a significant impact on the distribution of landcover in the low elevation region,while the slope has a significant impact on the distribution of landcover in the high elevation region.
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| Keywords
Land surface radiation temperature
Land surface temperature
Infrared channels
Downscaling
FY-2C
MODIS
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Issue Date: 16 December 2011
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2011,
Vol. 23
