文章摘要
沈明潭,谭炳香,戚 曌,于 航,贺晨瑞,于天飞.滇东南喀斯特石漠化地区植被覆盖度时空变化特征研究[J].林业调查规划,2022,(5):1-11
滇东南喀斯特石漠化地区植被覆盖度时空变化特征研究
Temporal and Spatial Variation Characteristics of Vegetation Coverage in Karst Rocky Desertification Area of Southeast Yunnan
  
DOI：
中文关键词: 植被覆盖度  时空变化特征  归一化差值山地植被指数  像元二分模型
英文关键词: vegetation coverage  spatial and temporal variation characteristics  normalized difference mountain vegetation index  dimidiate pixel model
基金项目:国家自然科学基金项目科技基础资源调查专项“全球地表覆盖时空变化专题地图集编制”（2019FY202504）；科技基础资源调查专项“全球地表覆盖时空变化信息采编与知识建模”（2019FY202501）.
作者单位
沈明潭 中国林业科学研究院资源信息研究所，北京 100091；国家林业和草原局林业遥感与信息技术重点实验室，北京 100091 
谭炳香 中国林业科学研究院资源信息研究所，北京 100091；国家林业和草原局林业遥感与信息技术重点实验室，北京 100091 
戚 曌 中国林业科学研究院资源信息研究所，北京 100091；国家林业和草原局林业遥感与信息技术重点实验室，北京 100091 
于 航 中国林业科学研究院资源信息研究所，北京 100091；国家林业和草原局林业遥感与信息技术重点实验室，北京 100091 
贺晨瑞 中国林业科学研究院资源信息研究所，北京 100091；国家林业和草原局林业遥感与信息技术重点实验室，北京 100091 
于天飞 中国林业科学研究院林业科技信息研究所，北京 100091 
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中文摘要:
      植被覆盖度是评价区域生态环境的重要指标，以Landsat影像为数据源，对云南省砚山县2000年、2010年和2020年3个时期的植被覆盖度进行估测，并分析其时空变化特征与地形、气候的关系。结果表明，砚山县整体植被覆盖度较高，2020年以较高度和高度植被覆盖度为主，在空间分布上呈东高西低的特征，在时间变化趋势上，2000—2010年不同等级植被覆盖度由高水平植被覆盖转为低水平植被覆盖，植被严重退化，2010—2020年由低水平植被覆盖转为高水平植被覆盖，植被覆盖显著改善；3个时期的植被覆盖分布在坡度等级上存在明显的线性关系（R2>0.95），植被覆盖度随坡度的增加呈升高趋势，在海拔梯度上随海拔的上升呈先减少后增加再减少的规律性变化。研究区植被覆盖度受降水与气温的共同影响，但与降水量的相关性更紧密。
英文摘要:
      Vegetation coverage is an important index to evaluate regional ecological environment. This paper used Landsat image as the data source to estimate the vegetation coverage in Yanshan County, Yunnan Province in 2000, 2010 and 2020, and analyze the relationship of the spatial and temporal variation characteristics with the terrain and climate. The results showed that the overall vegetation coverage of Yanshan County was relatively high, which was dominated by relatively high and high vegetation coverage in 2020, with the spatial distribution characteristics of high in the east and low in the west; in terms of time,the vegetation coverage at different levels changed from high level to low level vegetation coverage from 2000 to 2010, resulting in serious vegetation degradation, while the vegetation cover was transferred from low level to high level, and the vegetation cover was significantly improved from 2010 to 2020; there was an obvious linear relationship between vegetation coverage distribution and slope grade in the three periods (R2>0.95), and the vegetation coverage increased with the increase of slope, and decreased first, then increased and then decreased with the rise of altitude, which showed a regular change in the altitude gradient. The vegetation coverage in the study area was affected by both precipitation and temperature, but was more closely related to precipitation.
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