沈阳农业大学学报2017，Vol.48Issue(1)：115-121,7.DOI:10.3969/j.issn.1000-1700.2017.01.017
辽河干流流域植被盖度变化及其与气候因子的关系
Vegetation Coverage Change and Its Relationship with Climate Factors in Liaohe River Watershed
摘要
Abstract
In order to reveal the vegetation coverage changes of time and space of Liaohe River Watershedand its response to climatic factors, taking the period of 1999-2013 as a time scale, through ArcGIS spatial analysis module and mathematical statistics, we analyzed the interannual dynamics, the monthly variation in the year and the spatial change between NDVI andtemperature withprecipitation. The NDVI of Liaohe River Watershed was overall in upward trend in 1999-2013, whichrespectively reached 0.339, 0.405 and 0.409 in 2000, 2004 and 2008. The eological environment improvement area of Liaohe River Watershed accounted for 26.91% of the total area of the basin,and theecological environment that had a good representation in Zhangwu, Kangping and Fuxin. The effects of temperature and precipitation on the annual NDVI were significant,and the response of NDVI to temperature was higher than that of precipitation,and the response of NDVI to precipitation decreased from northeast to southwest. The growth rate of NDVI in the basin respectively reached 7.7% in summer, 3.4% in autumn, 1.5% in spring, 1.4%in winter, and the NDVI change trend in summer and autumn was the same as that in a full year.The correlation analysis showed that the NDVI had a significant correlation with temperature in 72.01% catchment area, which indicated that temperature was the main climate factor that influednced the annual vegetation coverage changes of Liaohe River Watershed, and that the response of vegetation cover to precipitation had a certain lag,which took mainly the winter snowmelt and spring precipitation as the form of expression.关键词
辽河干流流域/植被覆盖度/时空演变/气候因子Key words
Liaohe River Watershed/vegetation coverage/temporal evolution/climate factor分类
天文与地球科学引用本文复制引用
李一鸣,苏芳莉,李海福,赵光辉..辽河干流流域植被盖度变化及其与气候因子的关系[J].沈阳农业大学学报,2017,48(1):115-121,7.基金项目
国家自然基金面上项目(31470710) （31470710）
国家水体污染控制与治理科技重大专项(2012ZX07202004) （2012ZX07202004）
