[1]CHEN Honglei,OUYANG Wei,LYU Fengling,et al.Variation of Vegetation Cover and Its Correlation of Topographic Factors in Guandu River Basin[J].Research of Soil and Water Conservation,2019,26(03):135-140,147.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 03
Page number:
135-140,147
Column:
Public date:
2019-04-12
- Title:
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Variation of Vegetation Cover and Its Correlation of Topographic Factors in Guandu River Basin
- Author(s):
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CHEN Honglei, OUYANG Wei, LYU Fengling, SONG Yantun, HAO Rong
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Research Center of Water and Soil Conservation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
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- Keywords:
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vegetation coverage; dimidiate pix model; topographic factors; Guandu River Basin
- CLC:
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S127;X171.4
- DOI:
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- Abstract:
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In South-to-North Water Transfer Project source, Guandu River Basin was selected as the study area. The area is mainly mountainous and the ecological environment is fragile. Based on GIS and RS technology, using 1990, 1999, 2004, 1999 and 2010, Landsat TM remote sensing image, binary model based on pixels, and changes the slope method, vegetation coverage of different periods in the study area was quantitatively estimated and its space-time distribution characteristics were analyzed. The results showed that:(1) the vegetation coverage had obvious regularity in different river sections, the average values of the five periods of vegetation coverage in upper, middle and lower reaches were 94.52%, 87%, and 81.69%, respectively; (2) the change of vegetation cover was obviously influenced by topographic factors, the vegetation coverage was different from that of different terrain factors, and the effect of vegetation coverage, elevation and slope on different periods was significantly higher than that of aspect; as the slope increases, the vegetation coverage increases; the vegetation coverage of the whole area was greater than that of the region in terms of slope aspect; the vegetation coverage of Guandu River Basin increased with the increase of elevation in different periods; (3) vegetation cover changes in different geological units were different.