基于光谱分析的长江口湿地互花米草叶片叶绿素含量反演研究  

Study on the Inversion of Chlorophyll Content of SpartinaAlterniflora Leaf in the Yangtze River Estuary Wetland based on Spectral Analysis

作　　者：王佳鹏 施润和[1,2,3,4] 张超 刘浦东[1,2,3] 曾毓燕 

机构地区：[1]华东师范大学地理信息科学教育部重点实验室,上海200241 [2]华东师范大学地理科学学院,上海200241 [3]华东师范大学环境遥感与数据同化联合实验室,上海200241 [4]华东师范大学、美国科罗拉多州立大学中关新能源与环境联合研究院,上海200062

出　　处：《遥感技术与应用》2017年第6期1056-1063,共8页Remote Sensing Technology and Application

基　　金：国家重点研发计划项目(2016YFC1302602);上海市科委重大项目(15dz1207805);上海市卫计委重点学科建设项目(15GWZK0201);国家自然科学基金青年项目(31500392);中国博士后科学基金项目(2015M581569);中央高校基本科研基金;上海市城市化生态过程与生态恢复重点实验室开放课题(SHUES2017B01)

摘　　要：互花米草是我国滨海湿地主要入侵植物之一,对当地生态系统产生深远影响,其叶绿素含量信息是湿地生态系统关键生态功能定量化研究的重要基础数据。以长江口崇明东滩湿地为研究区,以实测互花米草叶片光谱反射率和总叶绿素含量为数据源,在400~1 000nm范围内研究原始光谱反射率和一阶导数光谱反射率的比值形式(RVI)与归一化差值形式(NDVI)组合,与叶绿素含量的相关性分析,并构建叶绿素含量估算模型。结果表明:基于原始光谱反射率的RVI和NDVI植被指数形式所构建的模型的精度最高,均方根误差RMSE分别达到0.24和0.25;一阶导数光谱反射率因噪声影响较大,其估算效果不佳;从模型所入选波段来看,红边波段在互花米草叶绿素含量估算中尤为重要。Spartina alternij2ora is one of the most important invasive species in the coastal wetlands in Chi- na,which have a profound impact on the local ecological system.The information of chlorophyll content is an important basic data for quantitative research on key ecological function of wetland ecosystem.The Yan- gtze River in Chongming Dongtan wetland is the study area.Based on the measured leaf spectral reflectance and total chlorophyll content of Spartina alterniflora,in the range of 400~1 000 nm,the ratio of the origi- nal form of the spectral reflectance and first derivative spectral reflectance（RVI）and normalized difference vegetation index（NDVI）in the form of combination are established for the correlation with the content of chlorophyll and the construction of the estimation model.The results show that RVI and NDVI vegetation index form model based on the original spectra have the highest accuracy, whose root mean square error （RMSE）are up to respectively 0.24 and 0.25; Because of the nosie in the first derivative spectral reflec- tance, the estimation model of chlorophyll has poor results; Based on the band selected from the model,the red edge band is particularly important in the estimation of chlorophyll content of Spartina alterniflora.

关 键 词：互花米草 叶绿素 光谱反射率 RVI NDVI 长江口 

分 类 号：Q945.11[生物学—植物学] TP79[自动化与计算机技术—检测技术与自动化装置]