dataRetrieval
Open Source
The USGS R package for pulling NWIS and Water Quality Portal data — gauge records as tidy data frames.
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
Alternatives to EGRET
Ranked by the topics, categories and workflow stages they share with EGRET.
fasstr
Open Source
Canadian government R package for streamflow analysis — trends, frequencies and summaries from HYDAT.
hydroTSM
Open Source
R workhorse for hydrological time series — aggregation, summaries and hydrologically-aware plots in a few calls.
rnrfa
Open Source
R client for the UK National River Flow Archive — catalogue, gauged daily flows and catchment metadata.
AquaChem
Commercial
Water quality data management, geochemical plotting, and statistical analysis software for hydrogeologists.
AQUATOX
Gov-Public
EPA's aquatic ecosystem model — fate and ecological effects of nutrients, toxics and stressors together.