Influence of Vegetation Coverage on Evapotranspiration of Alpine Meadow in Headwaters of the Yangtze River
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    Abstract:

    To investigate actual evapotranspiration(ET)under different degrees of vegetation coverage,three plots of alpine meadow were established on the places where the topography was of the same slope,direction,and shape and where the degrees of vegetation coverage were 92%,65%,and 30% in the headwaters of the Yangtze River.The lysimeter method was used to calculate ET of alpine meadow under different degrees of vegetation coverage.The characteristics of ET and the dominating factors in four periods were analyzed.Results show that ET increased with the reduction in vegetation coverage in the per-growth period,while ET decreased with the reduction in vegetation coverage in the growth period,post-growth period,and the frozen period.The change of vegetation coverage influenced ET in the growth period very obviously.The dominating factors varied with different periods.Heat played a leading role in the per-growth period and the post-growth period and moisture played a leading role in the growth period.

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范晓梅,刘光生,王一博,任东兴,王根绪.长江源区高寒草甸植被覆盖变化对蒸散过程的影响[J].水土保持通报英文版,2010,(6):17-21,26

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History
  • Received:April 19,2010
  • Revised:May 11,2010
  • Adopted:
  • Online: November 26,2014
  • Published: