山西农业大学学报（自然科学版）2017，Vol.37Issue(5)：345-350,380,7.
岔口小流域植被覆盖度时空变化特征分析
Analysis on temporal and spatial variation of vegetation coverage in Cha-Kou small watershed
摘要
Abstract
[Objective]The study aimed to provide a reference for the ecological environment evaluation and improvement in Cha-Kou Small Watershed while providing decision-making basis for the Slope-to-Terrace Project and slope greening project.[Method]Landsat-7 ETM data can be used to invert vegetation coverage change.With meteorological data and topography data during the same period,we analyzed the response of vegetation coverage to the climate change and the topography change.[Results]It found that the average vegetation coverage of study area was 0.51 during 2001-2010.The vegetation coverage in the west of study area was higher.Moreover,the vegetation coverage of wood land,plain land and dam land were relatively higher than the rest.During 2001-2010 the vegetation coverage of study area,whose average rate of change was 0.013/year,exhibited an increasing trend,especially in eastern and southern regions.There was a positive correlation between vegetation growth and temperature or rainfall,and rainfall was the main climate factor limiting vegetation growth.The influence of rainfall but not temperature on the vegetation growth showed an obvious time lag.As the highest altitude in study area was not up to the critical value limiting vegetation growth,vegetation coverage increased with the increase of altitude.And vegetation coverage increased with the increase of slope until the slope was up to the critical value when vegetation coverage decreases with the increase of slope.[Conclusion]During 2001-2010 the vegetation coverage of study area exhibited an increasing trend,climate change and the implementation of Grain-to-Green Project were major causes of its increase,and the topography change affected its distribution.关键词
植被覆盖度/影响因子/相关性Key words
Vegetation coverage/Influencing factor/Correlation分类
农业科技引用本文复制引用
张煌,郭青霞,冀云..岔口小流域植被覆盖度时空变化特征分析[J].山西农业大学学报（自然科学版）,2017,37(5):345-350,380,7.基金项目
国家自然科学基金项目(41071345) （41071345）
