Amazonian Hydrographic Data with Global Coverage at 1-Degree Resolution

This dataset is a subset of the Global Hydrographic dataset (GGHYDRO) Release 2.2, created for the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA). It provides 19 global raster layers at 1-degree resolution, detailing terrain types, drainage basins, cryosphere features, and water/ice runoff. The data is managed by ORNL_CLOUD and was last updated on a platform in March 2026, though a conflicting date of 1990 exists.

Use Cases

• Mapping major and smaller drainage basins (BAS1, BAS2) for hydrological modeling.
• Classifying land and water cover types, such as glaciers (GLAC), wetlands (SWMP), and perennial lakes (FLAK), for environmental assessments.
• Estimating annual surface water runoff (RNOF) and its associated error (RNER) for climate and water resource studies.
• Analyzing the distribution of cryosphere features (CRYO) and ice runoff (RICE) in polar and high-altitude regions.

Strengths

• Provides 19 distinct, globally consistent data layers covering a wide range of hydrographic and cryospheric features.
• Offers data at a standardized 1-degree by 1-degree spatial resolution, facilitating global-scale analysis and model integration.
• Includes estimated error metrics for key variables like surface runoff (RNER), supporting uncertainty analysis.

Limitations

• Conflicting last updated dates exist between platforms (1990 vs. 2026), casting doubt on the temporal provenance and update cycle.
• Specific row counts, column details, and dataset size are not provided by any source, limiting precise technical assessment.
• The license is ambiguously listed as 'other-license-specified' without clear terms for reuse.

Provenance

Source

Global Hydrographic data set (GGHYDRO) Release 2.2, compiled for the LBA experiment.

Collection Method

Derived from global sources and organized into 1-degree longitude by 1-degree latitude raster grids.

Freshness

2026-03-13 22:34:15.938469

Geography

Global coverage, with a defined study area for the LBA experiment in South America (longitude 85°W to 30°W, latitude 25°S to 10°N).