🌊 River Flow & Hydrology

Global Ungauged basins

GEOGLOWS River Forecast System Version 2 — Historical and Forecast Streamflow

GEOGLOWS River Forecast System Version 2 provides global modelled river discharge for approximately 6.25 million river reaches. It includes an hourly historical simulation from 1940 to near real time and daily…

Provider GEO Global Water Sustainability

Resolution Approximately 6.25 million vector river reaches and associated catchments. This is a river-network dataset rather than a regular raster grid.

Global Ungauged basins

GRADES-hydroDL Global Daily River Discharge Dataset

A global model-derived dataset providing daily river discharge for approximately 2.94 million vector river reaches from 1980 to near present using Grid LSTM runoff estimation and RAPID river routing.

Provider Center for Western Weather and Water Extremes, Scripps Institution of Oceanography, University of California San Diego

Resolution Approximately 2.94 million vector river reaches and associated catchments derived from MERIT-Basins hydrography. The runoff model operates on global 0.25-degree grid cells, while discharge is routed and reported at river

Global Ungauged basins

MERIT Hydro Version 1.0.1 — High-Resolution Global Hydrography

MERIT Hydro Version 1.0.1 is a high-resolution global hydrography dataset developed from the Multi-Error-Removed Improved-Terrain Digital Elevation Model, known as MERIT DEM, and several global inland-water da…

Provider Global Hydrodynamics Laboratory, Institute of Industrial Science, The University of Tokyo

Resolution 3 arc-seconds, approximately 90 metres at the equator; Google Earth Engine reports a nominal pixel size of approximately 92.77 metres

Global Ungauged basins

Caravan Global Community Dataset for Large-Sample Hydrology — Version 1.6

An open global hydrology dataset combining daily observed streamflow, ERA5-Land meteorological forcing, modelled soil and snow states, catchment boundaries and hundreds of standardised catchment attributes for…

Provider Caravan Global Hydrology Project

Resolution Individual gauged river catchments represented by gauge locations and watershed polygons; more than 16,000 catchments in the Version 1.6 core archive. This is not a continuous raster grid or complete global river network

Global Ungauged basins

GloFAS Historical River Discharge and Related Data

Global gridded daily river discharge and related hydrological variables generated by the GloFAS LISFLOOD model using ERA5 meteorological reanalysis data, covering 1979 to near real time.

Provider Copernicus Emergency Management Service (CEMS)

Resolution 0.05° × 0.05° regular latitude-longitude grid for GloFAS version 4.0, approximately 5 kilometres at the equator

Global

GRDC Global Runoff Database — Daily and Monthly River Discharge

The GRDC Global Runoff Database provides quality-checked daily and monthly river-discharge observations from gauging stations worldwide. The database combines historical and recently updated records contribute…

Provider GRDC Global River Discharge Data

Resolution Point observations at river-gauging stations, accompanied by station coordinates and upstream catchment information. Watershed boundaries are available for many stations.

Global

GSIM Global Streamflow Indices and Metadata Archive

A global archive of quality-controlled monthly, seasonal and yearly streamflow indices, station metadata and catchment information derived from observed daily river-flow records at more than 30,000 gauging sta…

Provider Global Streamflow Indices and Metadata Archive Research Consortium

Resolution Point observations at 30,959 river-gauging stations, with catchment boundaries available for 30,935 geographically valid station locations; this is not a regular gridded dataset

Global Ungauged basins

HydroRIVERS Version 1 — Global River Network

HydroRIVERS Version 1 provides a seamless global vector representation of the world’s river network. The dataset was extracted from the HydroSHEDS flow-direction and flow-accumulation grids produced at 15 arc-…

Provider Hydrological Data and Maps Based on Shuttle Elevation Derivatives at Multiple Scales

Resolution Vector river reaches extracted from HydroSHEDS grids at 15 arc-second resolution, approximately 500 metres at the equator. The network contains 8,477,883 reaches with an average reach length of approximately 4.23 kilomet

Monthly Streamflow of Europe Dataset (MSED)

A harmonized dataset of reconstructed monthly streamflow records from 3,224 river-gauging stations distributed across Europe for the period 1962–2017.

Provider Spanish National Research Council

Resolution Point-based river-gauging stations; 3,224 station locations. This is not a gridded dataset.

Global Ungauged basins

SWOT Level 4 Sword of Science River Discharge Products, Version 3

A global Level 4 dataset providing satellite-derived river-discharge time series, algorithm-specific estimates and a consensus SWOT discharge value for river reaches and nodes across all continents except Anta…

Provider NASA Physical Oceanography Distributed Active Archive Center

Resolution Vector-based river reaches and river nodes identified by the SWOT River Database, SWORD. This is a river-network dataset rather than a regular raster grid.