Over the course of several years, the Global Water Information Interest Group (GWIIG) of the Research Data Alliance focused on topics related to organization, representation, publication, sharing, discovery, re-use and integration of hydrologic information of different types.  One of the outcomes of the GWIIG was the creation of a list of web portals and/or websites with data or links to data on water resources.  The portals generally provide data that are at a minimum national in scope, and many of the portals offer global data.

The GWIIG requested that CUAHSI host this list to ensure permanence and wider distribution to the community. CUAHSI is continuously adding to the list based on community input. To suggest a web portal, please email help@cuahsi.org.

Users can scroll through the list of portals below, or use the browse and search tools above.

The list is by no means comprehensive. Feedback or information regarding additional portals can be sent to help@cuahsi.org


Global Runoff Data Centre (GRDC)

Site Owner:
Bundesamt für Gewässerkunde
Geographical Scope:
global

The Global Runoff Database at GRDC is a unique collection of river discharge data collected at daily or monthly intervals from more than 9,300 stations in 160 countries.

Groundwater Assessment Platform (GAP)

Site Owner:
Eawag
Geographical Scope:
global

Mapping and information platform for geogenic groundwater contamination

HydroLAKES

Site Owner:
World Wildlife Fund (WWF)
Geographical Scope:
global

A database provided by WWF that seeks to provide shoreline polygons for all global lakes with a surface area of at least 10 ha with some ancillary data.

Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales (HydroSHEDS)

Site Owner:
World Wildlife Fund (WWF)
Geographical Scope:
global

HydroSHEDS is a mapping product that provides hydrographic information for regional and global-scale applications in a consistent format. It offers a suite of geo-referenced data sets (vector & raster) at various scales, including river networks, watershed boundaries, drainage directions, and flow accumulations. HydroSHEDS is based on high-resolution elevation data obtained during a Space Shuttle flight for NASA's Shuttle Radar Topography Mission. 

HYdrological Predictions for the Environment (HYPE)

Site Owner:
Swedish Meteorological and Hydrological Institute (SMHI)
Geographical Scope:
selected regions (global)

Modeled Open Data for inspection and free download from multi-basin and large-scale applications of the HYPE model world-wide provided by the Swedish Meteorological and Hydrological Institute.

Indus Irrigation Advisory System

Site Owner:
Pakistan Council for Research in Water Resources (PCRWR)
Geographical Scope:
Pakistan

A satellite and numerical weather prediction based irrigation advisory service for Indus basin farmers and water management agencies.

Intelligent Dam Decisions and Assessment (I-DDEA)

Site Owner:
University of Washington
Geographical Scope:
Oregon and Washington

A dam-reservoir assessment tool for optimizing reservoir operations to maximize hydropower generation and minimize flood risk.

International Centre for Water Resourses and Global Change (ICWRGC)

Geographical Scope:
Global

The Global Terrestrial Network for Hydrology (GTN-H) links existing networks and systems for integrated observations of the global water cycle and operates under auspices of the Global Climate Observing System (GCOS) and the World Meteorological Organization / Climate and Water Department (WMO/CLW). The network was established in 2001 as a network of networks to support a range of climate and water resource objectives, building on existing networks and data centres, and producing value-added products through enhanced communications and shared development. The GTN-H website is a gateway to a great number of global observing systems for hydrological data.

IWRM Data Portal

Site Owner:
UNEP-DHI Partnership
Geographical Scope:
global

This data portal offers a comprehensive collection of national IWRM implementation progress data drawn from two global country IWRM progress surveys.

Joint Research Centre Water Portal (JRC Water Portal)

Site Owner:
European Commission
Geographical Scope:
Europe, partly global

The JRC water portal serves as the gateway to JRC’s products on freshwater and marine water resources, providing access to water data, publications, and maps, as well as to water projects and events. Some of the links in the JRC Activities Portals are not functional anymore.

Jupiter (National well database)

Site Owner:
Geological Survey of Denmark and Greenland
Geographical Scope:
Denmark

Jupiter is GEUS’ nationwide database for groundwater, drinking water, raw materials, environmental and geotechnical data. The database is the common public database within the field and is part of Denmark's Environment Portal. 

Mekong and Red River Water Forecasting System

Site Owner:
Vietnam National Water Resources Planning and Investigation (NAWAPI)
Geographical Scope:
South East Asia (Vietnam, Cambodia and Laos)

A transboundary reservoir and river flow forecasting system for Mekong and Red River basins.

National River Flow Archive (NRFA)

Site Owner:
Centre for Ecology & Hydrology (CEH); Research Centre of the Natural Environment Research Council (NERC)
Geographical Scope:
UK

UK's focal point for river flow data. The NRFA collates, quality controls, and archives hydrometric data from gauging station networks across the UK.