Streamflow Data Access Tools

The open global large-sample hydrology dataset — thousands of catchments with forcing, attributes and streamflow.

Browser-based hydrology and hydraulics calculators for practising engineers — no install, report-ready output.

USGS R package for long-term water-quality and streamflow trends — home of the WRTDS method.

A Python software stack for US hydrology data: NHD+ networks, gauges, DEMs, soils and climate via one API family.

CUAHSI's platform for sharing hydrological data and models — DOIs, collaboration and linked compute.

An open-source take on Google Flood Hub — per-gauge neural network streamflow forecasting you can self-host.

USGS software for Bulletin 17C flood-frequency analysis of annual peak-flow records.

Dewberry's open tool for building STAC catalogs of storms and gauge data — inputs for stochastic storm transposition.

USGS's merged surface-water and groundwater statistics program — baseflow separation, flow duration, low flows.

USGS web tool for basin delineation and regression-based flow statistics at any US stream point.

The USGS R package for pulling NWIS and Water Quality Portal data — gauge records as tidy data frames.

Canadian government R package for streamflow analysis — trends, frequencies and summaries from HYDAT.

R workhorse for hydrological time series — aggregation, summaries and hydrologically-aware plots in a few calls.

A friendly Python client for USGS NWIS streamflow data — request, cache and plot gauge records in a notebook.

R client for the UK National River Flow Archive — catalogue, gauged daily flows and catchment metadata.