Hyper-spectral characteristics of rolled-leaf desert vegetation in the Hexi Corridor, China

作     者：WEI Huaidong YANG Xuemei ZHANG Bo DING Feng ZHANG Weixing LIU Shizeng CHEN Fang 

作者机构：College of Geography and Environment ScienceNorthwest Normal UniversityLanzhou 730070China State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster CombatingGansu Desert Control Research InstituteLanzhou 730070China Key Laboratory of Remote Sensing of Gansu ProvinceNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2019年第11卷第3期

页      面：332-344页

核心收录：

学科分类：07[理学] 

基　　金：supported by the National Natural Science Foundation of China (31760241, 41671528) the Gansu Provincial Natural Science Foundation (17JR5RA061) the Gansu Province Basic Research Innovation Group Project (1506RJIA155) the Opening Foundation of the State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating, Gansu Desert Control Research Institute (GSDC201503) 

主　　题：rolled-leaf desert vegetation spectral characteristics mathematical transformation vegetation identification Hexi Corridor 

摘      要：Desert plants survive harsh environment using a variety of drought-resistant structural modifications and physio-ecological ***-leaf plants roll up their leaves during periods of drought,making it difficult to distinguish between the external structures of various types of plants,it is therefore necessary to carry out spectral characteristics analysis for species identification of these rolled-leaf *** on hyper-spectral data measured in the field,we analyzed the spectral characteristics of seven types of typical temperate zone rolled-leaf desert plants in the Hexi Corridor,China using a variety of mathematical transformation *** results show that:(1)during the vigorous growth period in July and August,the locations of the red valleys,green peaks,and three-edge parameters,namely,the red edge,the blue edge,and the yellow edge of well-developed rolled-leaf desert plants are essentially consistent with those of the majority of terrestrial vegetation types;(2)the absorption regions of liquid water,i.e.,1400-1500 and 1600-1700 nm,are the optimal bands for distinguishing various types of rolled-leaf desert plants;(3)in the leaf reflectance regions of 700-1250 nm,which is controlled by cellular structure,it is difficult to select the characteristic bands for differentiation rolled-leaf desert vegetation;and(4)after processing the spectral reflectance curves using a first-order differential,the envelope removal method,and the normalized differential ratio,we identify the other characteristic bands and parameters that can be used for identifying various types of temperate zone rolled-leaf desert plants,i.e.,the 510-560,650-700 and 1330-1380 nm regions,and the red edge *** general,the mathematical transformation methods in the study are effective tools to capture useful spectral information for species identification of rolled-leaf plants in the Hexi Corridor.