摘要
利用2010年环境一号卫星影像提取东洞庭湖湿地植被分布图,依据同时期的MODIS13数据合成增强植被指数(EVI)年最大值图与年平均值图,结合东洞庭湖高程,讨论东洞庭湖湿地植被及其生物量空间分布,并从水文因素及植被生长特性等方面分析其原因,推论出芦苇与湖草等植被的最适宜生长区域.结果说明,东洞庭湖植被及其生物量分布与高程及水环境有很大的相关性,在高程30m以上且远离水域区域,主要生长着对水分要求不高的防护林;芦苇适合生长在27m高程以上且靠近水域的区域,湖草适合生长在高程为23～27m间的区域.
HJ-1A/1B satellite data in 2010 were used to extract wetland vegetation of East Dongting Lake. Based on the same period＇s MODIS13 （Moderate Resolution Imaging Spectrometer） data production, the annual maximum value and average value of the EVI （Enhanced Vegetation Index） were synthesized. Vegetation spatial distribution and its biomass were discussed by combining the above indexes with the ele- vation figure of East Dongting Lake. Moreover, the most suitable growth area of vegetation was assessed from hydrological factors and vegetation growth characteristics, which will provide theoretical guidance for the protection of the vegetation diversity and the restoration and utilization of the vegetation resource in East Dongting Lake. All these proved that long water flooded time in the regions of low elevation was harmful to the growth of moss grasses. The results indicated that vegetation spatial distribution and its bi- omass had great correlation with the elevation and water environment in East Dongting. The shelter for-ests, whose while reeds grow in the water demand is not high, grow in the area more than 30m in height and away from the water, and near waters, and moss grasses are suitable to grow well in the area regions ranging from above 27m elevation 23m to 27 m.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第5期86-91,共6页
Journal of Hunan University:Natural Sciences
基金
国务院三峡委员会资助项目(SX2010-026)
国家自然科学基金资助项目(51039001
51009063)
