River flow gauging station on the river Kennet Catchment land useNRFA Leaflet

Gauging station map

Welcome to the National River Flow Archive

The National River Flow Archive (NRFA) is the UK’s focal point for river flow data.

The NRFA collates, quality controls, and archives hydrometric data from gauging station networks across the UK including the extensive networks operated by the Environment Agency (England), Natural Resources Wales, the Scottish Environment Protection Agency and the Rivers Agency (Northern Ireland).

Search for NRFA data

Find gauging stations, view site/catchment information and download flow data.
NRFA Data Holdings

Discover what data are held by the NRFA.
Peak Flow Data

Explore the *NEW* peak flow data holdings (previously provided by HiFlows-UK).

National Hydrological Monitoring Programme - analysis of hydrological events.

Special Issue on Climate change on water in the UK published - 20 February 2015

Climate change and water in the UK past changes and future prospects was published in special issue of Progress in Physical Geography. The paper reviews the impact of anthropogenic climate change on water in the UK and looks at projections of future change. The special issue also features the paper “Climate-driven changes in the UK river flows: A review of the evidence”, authored by Jamie Hannaford of the NRFA. The paper assess the evidence for climate change influences on UK river flow, including floods and droughts.

Further details can be found here.

Integrated Hydrological Units of the United Kingdom dataset released - 18 February 2015

A new freely available dataset of spatial reference units for hydrological purposes, called "Integrated Integrated Hydrological Unit MapHydrological Units of the United Kingdom" has been released. The dataset will aid hydrological analysis and water management in the UK by providing a consistent, nationwide framework for segregating river catchments into component parts. It also serves as a reference list of major river names and, by indicating which units are connected, it can be used to trace the flow of rivers across the country.

More information can be found here.

UK Hydrological Summary for January 2015 published - 13 February 2015

January exhibited a wide range of wintry weather, albeit separated into two distinct periods. The month began with intense stormy conditions driven by a vigorous jet stream, which brought strong winds and heavy rainfall particularly to western parts of the UK.The range of river flows exhibited in January largely followed the distribution of rainfall, with above normal flows in northern and western areas of the UK, and below normal flows characterising some eastern areas of both England and Scotland.

Further details can be found here.

Paper on the 2013/2014 winter floods published- 05 February 2015

Flooding Chalgrove February 2014A paper authored by Katie Muchan, Jamie Hannaford and Simon Parry of the NRFA, in collaboration with Melinda Lewis at the British Geology Survey has been published in a special issue of Weather, one year on from the 2013/2014 winter floods.


Further details can be found here.

UK Hydrological Summary for December 2014 published - 16 January 2015

For the UK as a whole, temperature and rainfall for December were near-average, but there were marked spatial contrasts and a wide range of weather conditions throughout the month. While there were spates mid-month, river flows were fairly typical for December and groundwater levels were also mostly in the normal range or above, with recharge well established at most sites.

Further details can be found here.

Click here for an archive of NRFA news items


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