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Investigation:

LC-07 (Melack / Novo / Forsberg)

LBA Dataset ID:

LC07_MONTHLY_INUNDATED_AREAS

Originator(s):

1. MELACK, J.M.
2. HESS, L.L.
3. GASTIL, M.
4. FORSBERG, B.R.
      5. HAMILTON, S.K.
6. LIMA, I.B.T.
7. NOVO, E.M.L.M.

Point(s) of Contact:

ORNL DAAC User Services Office Oak Ridge National Laboratory Oak Ridge, Tennessee 37 (ornldaac@ornl.gov)

Dataset Abstract:

(excerpt from abstract of Melack, 2004)
Monthly inundation areas for the fringing floodplains of the mainstem Solimoes/Amazon River were derived from analysis of the 37 GHz polarization difference observed by the Scanning Multichannel Microwave Radiometer from 1979 to 1987. L-band synthetic aperture radar data (Japanese Earth Resources Satellite-1) were used to determine inundation and wetland vegetation for the Amazon basin
(abstract from Hess, 2003)
The high and low water acquisitions of JERS SAR coverage of almost the whole Amazon Basin offers us a rich dataset; we have applied INPE's segmentation algorithms to conduct of polygon-based classification of wetlands using the JERS data. Further, we have developed a method for classifying and mapping floodplain habitats by linking multi-date SAR imagery with river stage records, incorporating information on both vegetation structure and inundation periodicity, and applied the method to sites in the central Amazon.
Description of derivation of this dataset:
The above data product provided proportions of habitats at the lo-water and hi-water seasons. The flooding pattern calculated from SMMR in Sippel 1998 was used to calculate monthly areas.
Monthly flooded areas are produced for two regions: Amazon Central (0-8 degrees S, 72-54 degrees W) and Amazon Mainstem (a subset described in the accompanying documentation.)

Beginning Date:

1979-01-01

Ending Date:

1996-06-30

Metadata Last Updated on:

2011-12-15

Data Status:

Archived

Access Constraints:

PUBLIC

Data Center URL:

http://daac.ornl.gov/

Distribution Contact(s):

ORNL DAAC User Services Office Oak Ridge National Laboratory Oak Ridge, Tennessee 37 (ornldaac@ornl.gov)

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.
Datafile(s):

LBA-ECO LC-07 Monthly Mean Flooded Wetlands Habitat, Central Amazon Basin: 1979-1996 :  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1049

Documentation/Other Supporting Documents:

LBA-ECO LC-07 Monthly Mean Flooded Wetlands Habitat, Central Amazon Basin: 1979-1996 :  http://daac.ornl.gov/LBA/guides/LC07_Monthly_Inundated_Areas.html

Citation Information - Other Details:

Melack J.M, L.L. Hess, M. Gastil, B.R. Forsberg, S.K. Hamilton, I.B.T. Lima, E.M.L.M. Novo. 2011. LBA-ECO LC-07 Monthly Mean Flooded Wetlands Habitat, Central Amazon Basin: 1979-1996. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi: 10.3334/ORNLDAAC/1049

Keywords - Theme:

Parameter Topic Term Source Sensor
LAND CLASSES LAND SURFACE LAND USE/LAND COVER NIMBUS-7 SMMR (SCANNING MULTICHANNEL MICROWAVE RADIOMETER)
LAND COVER LAND SURFACE LAND USE/LAND COVER JERS-1 JERS-1 SAR
LAND COVER LAND SURFACE LAND USE/LAND COVER JERS-1 JERS-1 SAR
WETLANDS LAND SURFACE LAND USE/LAND COVER JERS-1 JERS-1 SAR

Uncontrolled Theme Keyword(s):  AQUATIC MACROPHYTE, AQUATIC MACROPHYTES, CLASSIFICATION, FLOODED FOREST, FLOODING, FLOODPLAIN, HABITATS, INUNDATION, LAND COVER CLASSIFICATION, RIVER, RIVERS, SOLIMOES, 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 0.00000 -8.00000 -54.00000 -72.00000

Related Publication(s):

Melack, J.M., L.L. Hess, M. Gastil, B.R. Forsberg, S.K. Hamilton, I.B.T. Lima, and E.M.L.M. Novo. 2004. Regionalization of methane emissions in the Amazon Basin with microwave remote sensing. Global Change Biology 10(5):530-544.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

The monthly flooded area is a data product calculated from the classification map and monthly estimates of flooded area. The method of calculation is described in (Hess, RSE, 2003). The regions are illustrated in Figure 1 of (Melack, GCB, 2004). Flooded areas are given in square km. Error analysis is discussed in (Melack, GCB, 2004).




Brief description of the two regions:

Amazon Central:

A 1.77 km2 quadrant covering the central Amazon Basin between 0 and 8 degrees S latitude and 72 to 54 degrees W longitude is called the central Amazon Basin.



Amazon Mainstem:

A region covering the Amazon/Solimoes river mainstem from 70 degrees W to 54 degrees W is called the mainstem.




Brief description of the four habitats:

Flooded area is partitioned into four habitat classes as described in (Melack, GCB, 2004):

OW: Open water (OW)

RC: The river channel (RC) class is combined in the open water class (OW) for the

central Amazon Basin region but separate for the mainstem region

MA: The macrophyte (MA) class

FF: The flooded forest (FF) class also incorporates a flooded shrub class,

a flooded woodland class and a mixed class




Data file organization and contents:

File name: LC07_Amazon_wetland_habitats_monthly_flooded_area.csv

File date: 18-Dec-2003, modified 08-Jul-2008 (reformatting for archive preparation)

Data contact: Mary (Gastil) Gastil-Buhl <mary@icess.ucsb.edu> or John Melack< melack@lifesci.ucsb.edu>

Data description: Amazon central and mainstem wetland habitats monthly inundated area

LBA Data Set ID: LC07_Monthly_Inundated_Areas



Column Column Heading Units/format Description

1 Region Region: Amazon Central, Amazon Mainstem

2 Habitat_class Wetland habitat classification:

MA (macrophyte),

FF (flooded forest),

OW (open water),

RC (river channel)

3 Year YYYY Year

4 Month MM Month

5 Flooded_area square km Monthly flooded area in square kilometers






Example Data Records:

Region,Habitat_class,Month,Flooded_area

Amazon Central,MA,1,45900

Amazon Central,MA,2,52484

Amazon Central,MA,3,58532

Amazon Central,MA,4,65987

Amazon Central,MA,5,71185

Amazon Central,MA,6,60602

Amazon Central,MA,7,60017

Amazon Central,MA,8,53867

Data Application and Derivation:

Application:


This data was applied to calculate methane emissions. Results reported in Melack, 2004.


Derivation:


This data was derived from the wetlands habitat map (Hess, 2003) and passive microwave monthly data (Hamilton, 2002). The habitat map product was derived from the GRFM mosaic (see LC-11 dataset).

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

Quality Assessment:


[Excerpt from Melack, 2004, p. 536]


Uncertainties in the areas of wetland habitats were estimated with class probabilities derived from error matrices based on randomly located test pixels (Hess et al., 2003) and sampling frequencies derived from mapped class proportions in the fringing floodplains of the Solimoes/Amazon mainstem and in the 1.77km2 central quadrat (Table 2). The uncertainties, which reflect both the degree of confusion between classes and the relative areas of the classes for each date and region, range from 2% to 13%. A normal distribution with a SD of 25% of the mean was used for the SMMR estimates of inundated area per month based on the sensitivity analysis in Sippel et al. (1998). A normal distribution with a SD of 10% of the mean was used for open water in the Solimoes/Amazon River channel based on Sippel et al. (1998).

Process Description:

Data Acquisition Materials and Methods:

Data Acquisition Materials and Methods:





This data was derived from the wetlands habitat map (Hess, 2003) and passive microwave monthly data (Hamilton, 2002). The dual-season habitat map at low and high water was considered as the end-points of the monthly distribution of habitat areas. The passive microwave monthly data of total flooded area does not discriminate between different flooded habitats. These two data sets were combined to model a possible distribution of flooded habitats by month.

References:

Hamilton, S.K., S.J. Sippel, and J.M. Melack. 2004. Seasonal inundation patterns in two large savanna floodplains of South America: the Llanos de Moxos (Bolivia) and the Llanos del Orinoco (Venezuela and Colombia). Hydrological Processes 18(11):2103-2116. [Pub ID # 507 ]





Hess, L.L., J.M. Melack, E.M.L.M. Novo, C.C.F. Barbosa, and M. Gastil. 2003. Dual-season mapping of wetland inundation and vegetation for the central Amazon basin. Remote Sensing of Environment, Vol. 87, No. 4, pp. 404-428. [LBA-ECO Pub ID = 319 ]

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