A5006312406- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Hydrology and Sediment Transport Processes
- Remote Sensing and LiDAR Applications
- Arctic and Antarctic ice dynamics
- Coastal and Marine Management
- Ocean Waves and Remote Sensing
- Fish Ecology and Management Studies
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Climate change and permafrost
- Soil Moisture and Remote Sensing
- Maritime Navigation and Safety
- Climate variability and models
- Underwater Acoustics Research
- Geophysics and Gravity Measurements
- Oceanographic and Atmospheric Processes
- Marine Bivalve and Aquaculture Studies
- Strategic Planning and Analysis
- Tropical and Extratropical Cyclones Research
- Cryospheric studies and observations
- Water-Energy-Food Nexus Studies
- Cruise Tourism Development and Management
- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
- Transboundary Water Resource Management
University of North Carolina at Chapel Hill
2015-2018
Laboratoire d’Études en Géophysique et Océanographie Spatiales
2011-2012
Université Toulouse III - Paul Sabatier
2012
Centre National d'Études Spatiales
2010-2011
Abstract Using river centerlines created with Landsat images and the Shuttle Radar Topography Mission digital elevation model, we spatially continuous maps of mean annual flow width, slope, meander wavelength, sinuosity, catchment area for all rivers wider than 90 m located between 60°N 56°S. We analyzed distributions these properties, identified their typical ranges, explored relationships planform slope. found width to be directly associated magnitude wavelength area. Moreover, that...
Abstract Fluctuations in water surface elevation (WSE) along rivers have important implications for resources, flood hazards, and biogeochemical cycling. However, current situ remote sensing methods exhibit key limitations characterizing spatiotemporal hydraulics of many the world's river systems. Here we analyze new measurements WSE slope from AirSWOT, an airborne analogue to Surface Water Ocean Topography (SWOT) mission aimed at addressing remotely sensed observations water. To evaluate...
Abstract The upcoming Surface Water and Ocean Topography (SWOT) mission will measure water surface heights widths for rivers wider than 100 m. At its native resolution, SWOT height errors are expected to be on the order of meters, which prevent calculation slopes use slope‐dependent discharge equations. To mitigate width errors, high‐resolution measurements grouped into reaches (∼5 15 km), where slope estimated. We describe three automated river segmentation strategies defining optimum...
AirSWOT, an experimental airborne Ka-band interferometric synthetic aperture radar, was developed for hydrologic research and validation of the forthcoming Surface Water Ocean Topography (SWOT) satellite mission (to be launched in 2021). AirSWOT SWOT aim to improve understanding surface water processes by mapping elevation (WSE) slope (WSS) rivers, lakes, wetlands. However, utility these purposes remains largely unexamined. We present first investigation WSE WSS surveys over complex,...
The principal instrument of the SWOT (Surface Water and Ocean Topography) altimetry mission is KaRIn, a Ka-band interferometric SAR system operating on near-nadir swaths both sides satellite track. This article briefly describes measurement principle, processing steps specificities data KaRIn as compared to conventional spaceborne systems.
In the context of Surface Water and Ocean Topography (SWOT) mission, investigations are needed to refine error budget for discharge estimations. This letter proposes evaluate uncertainties in estimation mean river around seasonal peak flow due satellite temporal sampling intervals. The daily time series situ measurements 11 large rivers used analyze associated with four altimeter repeat cycles: 35-, 22-, 10-day cycles nadir-looking configuration current altimeters 22-day cycle SWOT...
The principal instrument of the wide-swath altimetry mission SWOT is KaRIn, a Ka-band interferometric SAR system operating on near-nadir swaths both sides satellite track. Due to short wavelength and particular observation geometry, there are very limited reports backscattering from natural surfaces. Simulators that cover radiometric geometric aspects therefore developed in framework CNES phase 0 A studies SWOT. This article presents modeling simulation approaches have been adopted, shows...
The principal instrument of the wide-swath altimetry mission SWOT is KaRIn, a Ka-band interferometric SAR system operating on near-nadir swaths both sides satellite track. Due to short wavelength and particular observation geometry, there are very limited reports backscattering from natural surfaces. Models simulators that cover radiometric geometric aspects have therefore been developed. This article describes airborne acquisitions ground measurements used validate models simulators, shows...
This study was carried out under the aegis of program Surface Water and Ocean Topography (SWOT) associated with National Center Space Studies (CNES). The future SWOT mission will offer new opportunities to survey hydrodynamic in rivers because it provide data on water level/ discharges a high spatial resolution (oceans: 1 km, rivers: 100 m width) global cover. However, is important estimate capacity reproduce phenomena estuaries temporal variability this dynamic. aim paper 1) hydrological...
This work was supported by the National Center for Space Studies in framework of future mission surface water and ocean topography (SWOT). The estuarine zones with their complex hydrodynamics represent a great challenge SWOT mission. Seine estuary selected Science Definition Team calibration/validation Thus aim this study is to investigate temporal hydrodynamic variability ability reproduce phenomena. For this, we used several statistical techniques frequency analyses applied on tide-gauge...