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Investigation:

LC-07 (Melack / Novo / Forsberg)

LBA Dataset ID:

LC07_IFSAR

Originator(s):

1. Melack, John M.
2. Novo, Evlyn Marcia Leao de Moraes
3. Alsdorf, Doug
4. Barbosa, Claudio
5. Costa, Maycira
      6. Hess, Laura
7. Mertes, Leal (deceased)
8. Palha, Willian
9. Slaymaker, Dana Munro

Point(s) of Contact:

Hess, Laura (lola@icess.ucsb.edu)

Dataset Abstract:

Stage measurements in mainstem rivers, upland tributaries and floodplain lakes are necessary for understanding flooding hazards, methane production, sediment transport, and nutrient exchange. Unfortunately, most remote basins have few gauging stations and nearly all are found on large river channels. To augment the station data, we find that interferometric synthetic aperture radar (SAR) data is capable of measuring subtle water level changes within flooded vegetation. Here, we use L-HH band radar data acquired over the central Amazon by the SIR-C mission. Interferometric phase is temporally incoherent over open-water. However, flooded forests and floodplain lakes with emergent shrubs permit radar double-bounce returns from water and vegetation surfaces, thus coherency is maintained. Interferometric phase observations show 7-11 cm one-day water-level decreases in tributaries and lakes within ~20 km of the mainstem and 2-5 cm drops at ~80 km. Proximal observations are in close agreement with mainstem gauge records, indicating rapid evacuation of the proximal floodplain to decreases in river stage.
These data are archived only at LBA DIS. There are currently no plans to document and prepare this data set for archive at the ORNL DAAC.

Beginning Date:

1996-09-01

Ending Date:

2000-01-01

Metadata Last Updated on:

2009-05-27

Data Status:

Archived

Access Constraints:

Public

Data Center URL:

Distribution Contact(s):

LBA-DIS User Services (lba-dis@cptec.inpe.br)

Access Instructions:

Public

Data Access:

IMPORTANT: The LBA-ECO Project website is no longer being supported. Links to external websites may be inactive. Final data products from the LBA project can be found at the ORNL DAAC. Please follow the fair use guidelines found in the dataset documentation when using or citing LBA data.

Citation Information - Other Details:

This data set was originally registered in LBA\'s Beija-flor system but the LC-07 PI has removed this data set from the list of LC-07 data sets to be documented and prepared for inclusion in NASA\'s LBA-ECO Data Archive at the ORNL DAAC.

Keywords - Theme:

Parameter Topic Term Source Sensor
LAND COVER LAND SURFACE LAND USE/LAND COVER RADARSAT-1 SAR (SYNTHETIC APERTURE RADAR)
LAND CLASSES LAND SURFACE LAND USE/LAND COVER RADARSAT-1 SAR (SYNTHETIC APERTURE RADAR)
INUNDATION LAND SURFACE LAND USE/LAND COVER RADARSAT-1 SAR (SYNTHETIC APERTURE RADAR)
WETLANDS LAND SURFACE LAND USE/LAND COVER RADARSAT-1 SAR (SYNTHETIC APERTURE RADAR)

Uncontrolled Theme Keyword(s):  aquatic macrophyte, aquatic macrophytes, classification, flooded forest, flooding, floodplain, inundation, land cover classification, river, rivers, varzea, vegetation, wetland, wetlands

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
Amazon Basin Amazon Basin 0.00000 -8.00000 -54.00000 -72.00000

Related Publication(s):

Alsdorf, D.E., L.C. Smith, and J.M. Melack. (2001) Amazon floodplain water level changes measured with interferometric SIR-C radar. Ieee Transactions on Geoscience and Remote Sensing 39(2):423-431.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

This is a poster presentation from an LBA symposium. The file is in pdf format. There is only one file. Variable descriptions and sample data record are not applicable.

Data Application and Derivation:

SAR data is applied to river stage measurement.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

The accuracy and validity are discussed in the reference, below.

Process Description:

Data Acquisition Materials and Methods:

Methods are discussed in the reference: Alsdorf, D.E., L.C. Smith, and J.M. Melack. (2001) Amazon floodplain water level changes measured with interferometric SIR-C radar. Ieee Transactions on Geoscience and Remote Sensing 39(2):423-431.

References:

Alsdorf, D.E., L.C. Smith, and J.M. Melack. (2001) Amazon floodplain water level changes measured with interferometric SIR-C radar. Ieee Transactions on Geoscience and Remote Sensing 39(2):423-431.

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