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Delta-X: UAVSAR L3 Water Level Changes, MRD, Louisiana, 2021

Overview

DOIhttps://doi.org/10.3334/ORNLDAAC/2058
Version1.1
Project
Published2022-08-29
Updated2022-08-29
Usage22 downloads

Description

This dataset contains georeferenced InSAR-derived water level change maps for Delta-X flight lines acquired during the spring (2021-03-27 to 2021-04-18) and fall (2021-09-03 to 2021-09-13) deployments. Water-level change observations are provided throughout wetlands of the Atchafalaya and Terrebonne Basins, in Southern Louisiana, USA, within the Mississippi River Delta (MRD). The data were collected by Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR), a polarimetric L-band synthetic aperture radar flown on the NASA Gulfstream-III (C20) aircraft as part of the Delta-X campaign. Water surface elevations were measured on multiple flights at 30-minute intervals. There are three types of gridded products available: temporalcoherence (which provide an index measuring quality of phase unwrapping ranging from 0 (poor) to 1 (correctly unwrapped)), waterlevelchange in centimeters (which provide cumulative changes in water levels at approximately 30-minute intervals), and waterlevelchange_ramp in centimeters (which provide a 2-dimensional linear trend in water-level estimates not related to changing water levels). The water-level change maps were estimated using the phase unwrapping corrected interferograms generated for nearest-neighbor (NN), NN+1, and NN+2 pairs for data acquired within a single flight (one day). This analysis was done for all flight lines. Water level changes are relative to the first sampling flight for that study area. Data quality was assessed by comparing water elevation estimates with data from in situ water level gauges throughout the study area.

Science Keywords

  • TERRESTRIAL HYDROSPHERE
  • SURFACE WATER
  • SURFACE WATER PROCESSES/MEASUREMENTS
  • STAGE HEIGHT
  • TERRESTRIAL HYDROSPHERE
  • SURFACE WATER
  • SURFACE WATER PROCESSES/MEASUREMENTS
  • INUNDATION
  • TERRESTRIAL HYDROSPHERE
  • SURFACE WATER
  • SURFACE WATER FEATURES
  • WETLANDS
  • BIOSPHERE
  • ECOSYSTEMS
  • FRESHWATER ECOSYSTEMS
  • RIVERS/STREAM
  • BIOSPHERE
  • ECOSYSTEMS
  • MARINE ECOSYSTEMS
  • ESTUARY
  • LAND SURFACE
  • GEOMORPHIC LANDFORMS/PROCESSES
  • COASTAL LANDFORMS
  • SALT MARSH
  • BIOSPHERE
  • ECOSYSTEMS
  • MARINE ECOSYSTEMS
  • COASTAL

Data Use and Citation

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Crosscite Citation Formatter
Jones, C., T. Oliver-Cabrera, M. Simard, and Y. Lou. 2022. Delta-X: UAVSAR L3 Water Level Changes, MRD, Louisiana, 2021. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2058

This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use Policy. See our Data Use and Citation Policy for more information.

Data Files

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Companion Files

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Dataset has 1 companion files.

  • DeltaX_L3_UAVSAR_WaterLevels.pdf

Additional Resources

TypeTitle
TutorialDelta-X Applications Workshop