[1]TANG Qiaoying,QI Dehui,SONG Liwang,et al.Correlation of Vegetation Coverage and Topographic Factors in Yanhe River Basin Based on GIS and RS[J].Research of Soil and Water Conservation,2017,24(04):198-203.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 04
Page number:
198-203
Column:
Public date:
2017-08-28
- Title:
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Correlation of Vegetation Coverage and Topographic Factors in Yanhe River Basin Based on GIS and RS
- Author(s):
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TANG Qiaoying1, QI Dehui2, SONG Liwang2, WEN Zhongming3
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1. Zhejiang Tongji Vocational College Of Science And Technology, Hangzhou 311231, China;
2. Zhejiang Design Institute of Water Conservancy and Hydroelectric Power, Hanzhou 310002, China;
3. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China
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- Keywords:
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vegetation coverage; topographic factors; correlation; Yanhe River Basin
- CLC:
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TP79;S157
- DOI:
-
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- Abstract:
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Vegetation coverage of Yanhe River Basin from 2000 to 2010 was calculated from Landsat TM image using mixed pixel decomposition model based on GIS and RS. In order to provide basis for vegetation restoration and ecological construction of Yanhe River Basin, the correlation of vegetation coverage and topographic factors was analyzed combing elevation, slope and slope aspect extracted from DEM. The result showed that vegetation coverage of Yanhe River Basin increased from 29.18% in 2000 to 52.42% in 2010; in 2000, vegetation coverage of Yanhe River Basin decreased with the elevation increased; in 2010, vegetation coverage of Yanhe Rriver Basin increased first and then decreased as the elevation increased; vegetation coverage of Yanhe River Basin increased first and then decreased as the slope increased, and was the highest in the lands with gradients of 30°~35°; vegetation coverage in 2000 and 2010 decreased in the sequence: shady slope (north, northeast) > half sunny slope(southeast, west)=half shady slope(east, northwest) > sunny slope(south, southwest) > flat, the highest vegetation coverage was found in shady slope and the lowest vegetation coverage was found in flat land. The value of vegetation coverage increase was the biggest at 1 000~1 500 m elevation and on the slope with gradients of 25°~45°.