气候变化领域集成服务门户(CCPortal): Regional-scale hydrological monitoring of wetlands with Sentinel-1 InSAR observations: Case study of the South Florida Everglades

CCPortal

DOI	10.1016/j.rse.2020.112051
	Regional-scale hydrological monitoring of wetlands with Sentinel-1 InSAR observations: Case study of the South Florida Everglades
	Liao H.; Wdowinski S.; Li S.
发表日期	2020
ISSN	00344257
卷号	251
英文摘要	Wetland is a very fragile ecosystem that provides important services to a large variety of flora and fauna species, as well as for humans. As wetland depends on water availability, protecting this important ecosystem requires careful hydrological monitoring. The Sentinel-1 mission, featuring a wide swath coverage, high temporal observations and open data policy, provides unprecedented opportunity for high spatio-temporal resolution water level change mapping over regional-wide wetland areas. In this study, we assess Sentinel-1 InSAR observations for routine water level change measurements over the entire south Florida Everglades wetlands. The study utilizes 91 Sentinel-1 images acquired over a three-year period (Sep 2016 to Nov 2019) and generates routine 12-days Interferograms and correspondingly 30 m spatial resolution water level change maps over the entire Everglades. The high spatial resolution interferograms detect hydrological signals induced by both natural- and human-induced flow, including tides, gate operations, and canal overflow; all these cannot be detected by terrestrial measurements. The large number of both InSAR and ground-based gauge observations allow us to quantify the overall accuracy of the Sentinel-1 InSAR measurements, which is 3.9 cm for the entire wetland area, but better for smaller hydrological units within the Everglades. Our study reveals that the tropospheric delay for individual interferograms can be very large, as much as 30 cm (~10 fringes). When applying tropospheric corrections to all three years of Sentinel-1 InSAR observations, the overall accuracy level improved by 13% to 3.4 cm. Although our study is focused on the Everglades, its implications in term of the suitability of Sentinel-1 observations for space-based hydrological monitoring of wetlands and the derived accuracy level are applicable to other wetlands with similar vegetation types, located all over the world. © 2020 Elsevier Inc.
英文关键词	Accuracy; Everglades; Gauge; SAR interferometry (InSAR); Tropospheric delay; Water level change; Wetland
语种	英语
scopus关键词	Ecosystems; Image resolution; Interferometry; Open Data; Troposphere; Water levels; High spatial resolution; Hydrological monitoring; Hydrological signals; Overall accuracies; Spatial resolution; Spatio-temporal resolution; Tropospheric delays; Water level changes; Wetlands; accuracy assessment; atmospheric correction; ecosystem management; ecosystem service; hydrological modeling; image analysis; interferometry; mapping method; observational method; satellite imagery; satellite mission; scale effect; Sentinel; spatial resolution; synthetic aperture radar; troposphere; water level; wetland; Everglades; Florida [United States]; United States
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179136
作者单位	Institute of Environment, Department of Earth and Environment, Florida International University, Miami, FL 33199, United States
推荐引用方式 GB/T 7714	Liao H.,Wdowinski S.,Li S.. Regional-scale hydrological monitoring of wetlands with Sentinel-1 InSAR observations: Case study of the South Florida Everglades[J],2020,251.
APA	Liao H.,Wdowinski S.,&Li S..(2020).Regional-scale hydrological monitoring of wetlands with Sentinel-1 InSAR observations: Case study of the South Florida Everglades.Remote Sensing of Environment,251.
MLA	Liao H.,et al."Regional-scale hydrological monitoring of wetlands with Sentinel-1 InSAR observations: Case study of the South Florida Everglades".Remote Sensing of Environment 251(2020).