NOTICE -- The LBA-ECO Project website is no longer being supported.  This archive is a snapshot, as it existed in 2013, of the LBA-ECO website, maintained by NASA Goddard Space Flight Center, and now archived at the ORNL DAAC.  Links to external websites may be inactive. Final data products from the LBA project can be found at the ORNL DAAC.
banner
banner banner banner banner banner banner
banner banner banner banner banner banner banner
home aboutlibrarynews archivecontacts banner

spacer
banner
Investigations
Overview
Abstracts & Profiles
Publications
Research Sites
Meetings
Synthesis Groups
LBA-HYDROMET
LBA-Air-ECO
Logistics
Overview
Field Support
Travel
Visa
Shipping
Data
  Overview
Find LBA Data
Investigator Checklist
Process & Policy
Documentation & Archive
Training & Education
  Overview
Activities Summary
T&E Goals
Student Opportunities
  Folha Amazônica
 
spacer

Investigation:

CD-06 (Richey / Victoria)

LBA Dataset ID:

CD06_CAMREX

Originator(s):

1. MAYORGA, E.
2. LOGSDON, M.G.
      3. BALLESTER, M.V.R.
4. RICHEY, J.E.

Point(s) of Contact:

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

Dataset Abstract:

The CAMREX Amazon River System dataset was created using a digital channel network and a nearest-neighbor method, without the use of a Digital Elevation Model (DEM). The methods developed derive space-filling gridded cell-to-cell surface flow paths from digital channel networks, intended to be used in regions where existing DEMs are inadequate but detailed channel network maps are available. Required inputs include a vector or gridded representation of the river network, the mouth of the system, and the corresponding basin boundary. The algorithm first assigns cell-to-cell flow directions to each cell in the gridded river network using shortest-distance criteria. Next it allocates each land cell to its nearest river network cell; and finally, it approximates a cell-to-cell flow path from each land cell to a river cell. With a complete land and river flow direction grid created, surface flow path analysis functions can be applied in the same manner as with flow direction grids derived from DEMs. This methodology was applied to the entire Amazon basin using a corrected version of the Digital Chart of the World river network; the derived Amazon datasets are made freely available and may be used in hydrological and biogeochemical modeling and in studies linking river observations to their corresponding drained areas, particularly in connection with LBA. We have created additional datasets from the base datasets. These include a stream network coverage with stream order assigned to each reach; the basin boundaries of the major tributaries to the Amazon mainstem; and the mouths and source points of these basins. Both vector and raster versions are included in most cases.

Beginning Date:

1940-01-01

Ending Date:

1960-01-01

Metadata Last Updated on:

2012-05-24

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 CD-06 Amazon River Basin Land and Stream Drainage Direction Maps :  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1086

Documentation/Other Supporting Documents:

LBA-ECO CD-06 Amazon River Basin Land and Stream Drainage Direction Maps :  http://daac.ornl.gov/LBA/guides/CD06_CAMREX.html

Citation Information - Other Details:

Mayorga, E., M.G. Logsdon, M.V.R. Ballester, and J.E. Richey. 2012. LBA-ECO CD-06 Amazon River Basin Land and Stream Drainage Direction Maps. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. http://dx.doi.org/10.3334/ORNLDAAC/1086

Keywords - Theme:

Parameter Topic Term Source Sensor
DRAINAGE HYDROSPHERE SURFACE WATER MAPS DIGITIZER
RIVER NETWORK HYDROSPHERE SURFACE WATER MAPS DIGITIZER
RIVERS/STREAMS HYDROSPHERE SURFACE WATER MAPS DIGITIZER

Uncontrolled Theme Keyword(s):  BASIN, BASIN EXTRACTION, CAMREX, DRAINAGE AREA, EOS-AMAZON , FLOW DIRECTION, RIVERS

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
  AMAZON BASIN 6.00000 -20.50000 -48.50000 -80.50000

Related Publication(s):

Mayorga, E., M.G. Logsdon, M.V.R. Ballester, and J.E. Richey. 2005. Estimating cell-to-cell land surface drainage paths from digital channel networks, with an application to the Amazon basin. Journal of Hydrology 315(1-4):167-182.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

All GIS datasets are in unprojected, geographic coordinates (latitude & longitude, in decimal degrees). They were created using ArcInfo workstation. Gridded datasets are in bil binary format with appropriate headers. Vector datasets are in coverage format, as ArcInfo export (.e00) files. All datasets include projection information (.prj files).






GRIDDED DATASETS



Grid Resolution: 0.005 degrees

Spatial Extent: 80.5W to 48.5W, 20.5S to 6N

5300 rows x 6400 columns



amzflowlen is a float data-type. All other grids are integer-type.



amzflowdir: Flow direction grid (1-128, following the ARCINFO convention)

amzflowlen: Flow length grid (floating point), in km from the mouth of the Amazon

amzflowacc: Flow accumulation grid (following ARCINFO conventions)

amzbasin: The amazon basin; this grid is completely consistent with the above grids




VECTOR DATASETS



amzrivnet_v: The cleaned up, single-vector-thickness network from the DCW. This network serves

as the base data for the rest of the gridded system.

amzmainstm_v: The Amazonas mainstem proper -- that is, the river reach beginning at the

confluence of the Ucayali and Marañón rivers and ending at the mouth.

amzmouthpt_v: Point coverage with a single point: the mouth of the Amazon.

amzstrmord_v: An arc coverage indicating stream orders, using the grid function streamline

amztrbmth_v: Point coverage with the mouth points of all the major tributaries.

amztrbsrc_v: Point coverage with one point for each of the major tribs (including

the mainstem), corresponding to the maximum distance from the tributary

mouth -- that is, the source of that tributary.

amztrbbas_v: Polygonal coverage showing each major tributary subbasin as well as the

mainstem drainage area.

Data Application and Derivation:

The methods developed derive space-filling gridded cell-to-cell surface flow paths from digital channel networks, intended to be used in regions where existing DEMs are inadequate but detailed channel network maps are available.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

Quality assessment information not available.

Process Description:

Data Acquisition Materials and Methods:

The methods developed derive space-filling gridded cell-to-cell surface flow paths from digital channel networks, intended to be used in regions where existing DEMs are inadequate but detailed channel network maps are available. Required inputs include a vector or gridded representation of the river network, the mouth of the system, and the corresponding basin boundary. The algorithm first assigns cell-to-cell flow directions to each cell in the gridded river network using shortest-distance criteria. Next it allocates each land cell to its nearest river network cell; and finally, it approximates a cell-to-cell flow path from each land cell to a river cell. With a complete land and river flow direction grid created, surface flow path analysis functions can be applied in the same manner as with flow direction grids derived from DEMs. This methodology was applied to the entire Amazon basin using a corrected version of the Digital Chart of the World river network; the derived Amazon datasets are made freely available and may be used in hydrological and biogeochemical modeling and in studies linking river observations to their corresponding drained areas, particularly in connection with LBA. We have created additional datasets from the base datasets. These include a stream network coverage with stream order assigned to each reach; the basin boundaries of the major tributaries to the Amazon mainstem; and the mouths and source points of these basins. Both vector and raster versions are included in most cases.

References:

Mayorga, E., M.G. Logsdon, M.V.R. Ballester, and J.E. Richey. 2005. Estimating cell-to-cell land surface drainage paths from digital channel networks, with an application to the Amazon basin. Journal of Hydrology 315(1-4):167-182. [LBA-ECO Pub ID = 670 ]

Skip navigation linksHOME | ABOUT | LIBRARY | NEWS ARCHIVE | CONTACTS | INVESTIGATIONS | LOGISTICS | DATA |TRAINING & EDUCATION

NASA logo
ORNL DAAC
Get Acrobat Reader