Rondonia Streamwater Chemistry and Watershed Data from 1998-1999

Streamwater samples and watershed characteristics from sixty sites in Rondonia, Brazil, collected to study the impact of land use on tropical hydrology. The dataset includes chemical analyses for sodium, calcium, magnesium, potassium, silica, chloride, sulfate, pH, and acid neutralizing capacity from dry and wet season sampling in 1998-1999. It was produced by NASA, integrating field sampling with remote sensing and census data.

Use Cases

• Analyzing correlations between watershed deforestation percentage and stream concentrations of base cations like calcium and potassium.
• Comparing seasonal variations in water chemistry (e.g., silica, sulfate) between dry (August 1998) and wet (Jan-Feb 1999) periods.
• Modeling the influence of soil cation content and lithology on dissolved silicon and chloride levels.
• Assessing the impact of urban watershed population density on streamwater sulfate and chloride concentrations.

Strengths

• Includes paired seasonal observations for 49 streams, enabling temporal comparison.
• Watershed characteristics derived from multiple verified sources: Landsat TM imagery, digitized soil/topographic maps, and Brazilian census data.
• Covers a specific region (Rondonia, Brazil) with 60 sampling sites across forested and non-forested areas.

Limitations

• Key metadata conflicts: row count, file size, and specific column names are unknown across all platforms.
• Limited temporal scope, with sampling confined to two seasons in 1998-1999.
• License is ambiguously specified as 'other-license-specified' on Data.gov, with no details provided on NASA Earthdata.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Synoptic streamwater sampling combined with watershed data derived from digitized soil maps, soil profile analyses, topographic maps, Landsat TM land use mosaics, and Brazilian census data.

Time Range

1998-1999

Freshness

2026-03-13 01:00:50.247100

Geography

Rondonia, Brazil