Soil salinity mapping in Everglades National Park using remote sensing techniques and vegetation salt tolerance

doi:10.1016/j.pce.2019.01.004

	Soil salinity mapping in Everglades National Park using remote sensing techniques and vegetation salt tolerance
	Khadim, Fahad Khan 1; Su, Hongbo 2; Xu, Lina 3; Tian, Jing 4
刊名	PHYSICS AND CHEMISTRY OF THE EARTH
	2019-04-01
卷号	110 页码:31-50
关键词	Everglades national park Remote sensing Geographic information system Soil salinity mapping Land cover classification
ISSN号	1474-7065
DOI	10.1016/j.pce.2019.01.004
通讯作者	Su, Hongbo(suh@fau.edu)
英文摘要	Everglades National Park (ENP) is a hydro-ecologically enriched wetland with varying salinity contents, which is a concern for terrestrial ecosystem balance and its nearby urban sustainability. In this study, spatio-temporal soil salinity maps are created using remote sensing techniques, coupled with literature review to understand vegetation salt tolerance properties, and field assessments entailing insitu electric conductivity (EC) measurements. The mapping first entailed the execution of a supervised machine learning technique-the maximum likelihood classification algorithm-to delineate seven vegetation-based land cover classes for the area, namely, mangrove forest, mangrove scrub, low-density forest, sawgrass, prairies and marshes, barren lands with woodland hammock and water, for the years 1996, 2000, 2006, 2010 and 2015. The classifications for 1996-2010 yielded accuracies of 82%-94%, and the 2015 classification was supported through ground truthing. Afterwards, EC tolerance thresholds for each vegetation class were established, which yielded soil salinity maps comprising four soil salinity classes-i.e., the non- (EC = 0-2 dS/m), low- (EC = 2-4 dS/m) and high-saline (EC >= 4 dS/m) areas. The soil salinity maps visualized the spatial distribution of soil salinity with no significant temporal changes. Furthermore, insitu EC measurements carried out at 23 sampling sites covering all land cover classes mostly validated (91% samples were tested within range) the estimated soil salinity ranges for the latest distribution. The approach of using land cover classes to sense salinity ranges in an urban-proximal ecosystem is pragmatic and application oriented, attributing to novel and useful study upshots considering the diversifying ecological context.
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDA20010302] ; National Natural Science Foundation of China[41571356] ; Walter and Lalita Janke Innovations in Sustainability Science Research Fund of 2016, through Florida Center of Environmental Studies ; National High-tech R&D Program of China (863 Program)[2012AA121303]
WOS关键词	AL HASSA OASIS ; RADAR BACKSCATTER ; MANGROVE ; FLORIDA ; METHODOLOGY ; ACCURACY ; PATTERNS ; WETLANDS ; FORESTS ; BIOMASS
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000468920500005
资助机构	Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Walter and Lalita Janke Innovations in Sustainability Science Research Fund of 2016, through Florida Center of Environmental Studies ; National High-tech R&D Program of China (863 Program)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/59485]
专题	中国科学院地理科学与资源研究所
通讯作者	Su, Hongbo
作者单位	1.Univ Connecticut, Dept Civil & Environm Engn, 38 W Pk St, Willimantic, CT 06226 USA 2.Florida Atlantic Univ, Dept Civil Environm & Geomat Engn, Boca Raton, FL 33433 USA 3.China Univ Geosci, Inst Geophys & Geomat, Wuhan, Hubei, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Khadim, Fahad Khan,Su, Hongbo,Xu, Lina,et al. Soil salinity mapping in Everglades National Park using remote sensing techniques and vegetation salt tolerance[J]. PHYSICS AND CHEMISTRY OF THE EARTH,2019,110:31-50.
APA	Khadim, Fahad Khan,Su, Hongbo,Xu, Lina,&Tian, Jing.(2019).Soil salinity mapping in Everglades National Park using remote sensing techniques and vegetation salt tolerance.PHYSICS AND CHEMISTRY OF THE EARTH,110,31-50.
MLA	Khadim, Fahad Khan,et al."Soil salinity mapping in Everglades National Park using remote sensing techniques and vegetation salt tolerance".PHYSICS AND CHEMISTRY OF THE EARTH 110(2019):31-50.