EGRET
Open Source
USGS R package for long-term water-quality and streamflow trends — home of the WRTDS method.
Water Quality & EnvironmentalActiveWater Quality ModellingR Hydrology
R packages (CRAN) for water engineering
8 tools in the directory — every listing curated and classified by hand.
SPEI (R package)
Open Source
The reference R implementation of SPEI and SPI from the index's own authors.
Climate & Change AnalysisStableDrought AnalysisR Hydrology
airGR
Open Source
INRAE's GR rainfall-runoff models (GR4J family) plus CemaNeige snow, packaged for R.
Hydrology & Catchment AnalysisActiveR HydrologySnow Hydrology
dataRetrieval
Open Source
The USGS R package for pulling NWIS and Water Quality Portal data — gauge records as tidy data frames.
Data, Monitoring & ForecastingActiveStreamflow DataR Hydrology
fasstr
Open Source
Canadian government R package for streamflow analysis — trends, frequencies and summaries from HYDAT.
Data, Monitoring & ForecastingActiveStreamflow DataR Hydrology
hydroTSM
Open Source
R workhorse for hydrological time series — aggregation, summaries and hydrologically-aware plots in a few calls.
Data, Monitoring & ForecastingStableR HydrologyStreamflow Data
rnrfa
Open Source
R client for the UK National River Flow Archive — catalogue, gauged daily flows and catchment metadata.
Data, Monitoring & ForecastingStableStreamflow DataR Hydrology
swmmr
Open Source
Run and read EPA SWMM from R — model execution, results import and GIS conversion on CRAN.
Urban Stormwater & InfrastructureDormantSWMMR Hydrology