AQUATOX
Gov-Public
EPA's aquatic ecosystem model — fate and ecological effects of nutrients, toxics and stressors together.
Water Quality & EnvironmentalDormantWater Quality Modelling
EGRET
ActiveUSGS R package for long-term water-quality and streamflow trends — home of the WRTDS method.
by US Geological Survey
- Pricing
- Open Source
- License
- CC0 (US Government)
- Commercial use
- Permitted
- Ecosystem
- R
- Platform
- Windows, macOS, Linux
Install
install.packages("EGRET")About EGRET
EGRET (Exploration and Graphics for RivEr Trends) is the USGS package for analysing decades-long records of streamflow and river chemistry. Its centrepiece, WRTDS (Weighted Regressions on Time, Discharge and Season), separates real water-quality trends from flow variability — now the standard method for nutrient-trend reporting in US rivers, including the Chesapeake Bay programme.
It pairs naturally with dataRetrieval for pulling USGS records, produces publication-grade graphics, and its methods papers give reviewers a solid citation trail. For "is this river actually getting cleaner" questions, EGRET is the credible answer machine.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
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Other water quality & environmental tools covering similar workflow stages.
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