基于遥感的江苏省滨海湿地景观植被覆盖度分级研究  

Classification of Vegetation Coverage of Wetland Landscape based on Remote Sensing in the Coastal Area of Jiangsu Province

作　　者：谭清梅[1] 刘红玉[1] 张华兵[1] 王聪[1] 侯明行[1] 

机构地区：[1]南京师范大学地理科学学院,江苏南京210023

出　　处：《遥感技术与应用》2013年第5期934-940,共7页Remote Sensing Technology and Application

基　　金：国家自然科学基金项目(41041119);江苏省高校自然科学研究重大项目(10KJA170029)

摘　　要：利用遥感技术和方法对盐城海滨湿地进行分类研究,并利用归一化植被指数NDVI和改进的像元二分模型,建立植被覆盖度估算模型,计算不同植被类型覆盖度(Fc)及其等级。进一步叠加植被覆盖率分级图与湿地遥感分类图,揭示两者关系。结果表明:海滨湿地植物群落带状分布明显,且植被与非植被带差异显著。各个植被带覆盖等级存在一定差异,芦苇主要分布在高植被覆盖区,其面积占芦苇总面积的67.45%,较高植被覆盖区面积占23.61%,低植被覆盖区面积占8.94%;碱蓬主要分布在较高植被覆盖区,其面积占碱蓬总面积的81.14%,高覆盖区面积占3.36%,低植被覆盖区面积占16.06%;米草集中在高植被覆盖区,其占米草总面积的83.47%,较高植被覆盖区占15.07%,低植被覆盖区占1.74%。其中高植被覆盖率分布区主要在各个植被带中间地带,而交错带区域植物覆盖率通常较低。The Vegetation Coverage Estimation Model （VCEM） was established based on the classification of coastal wetlands by remote sensing technology and the improved dimidiate pixel model as well as the Normalized difference vegetation index （NDVI）. The VCEM was used to calculate vegetation coverage （Fc） and grade level for different wetland types in the study area of Yancheng,Jiangsu Province. The rela tionship between wetland vegetation coverage and their types was analyzed further by overlaying the cover age classification map and wetland landscape map. The results show that the zonal distribution of plant community of the coastal wetland was notable. And the vegetation coverage level varies with different types of wetland. The reed marshes tend to grow at the high vegetation coverage zone,which count for 67.45% of the total area of reed marshes, and the medium vegetation coverage zone account for 23. 61%,and the low vegetation coverage zone only account for 8.94%. Most the Suaeda salsa marshes were in the modium vegetation coverage zone,which account for 81.14% of its total area,and 3.36% and 16.06% were distributed at the high vegetation coverage zone and the low vegetation coverage zone respectively. Most of the Spartina alterniflora marshes were distributed at the high vegetation coverage zone, accounting of 83.47% of its total area,and only 15.07% at the medium vegetation coverage zone,1.74% at the low vegetation coverage zone. In addition,most high vegetation coverage areas of wetlands were distributed at the middle location of each vegetation zone,and the Transition zone for each wetland type was usually with lower vegetation coverage level.

关 键 词：景观生态 植被覆盖度 遥感分类 盐城湿地 

分 类 号：X87[环境科学与工程—环境工程] TP79[自动化与计算机技术—检测技术与自动化装置]