Monthly Hydrological Summaries

Logo for the National Hydrological Monitoring Programme

The National Hydrological Monitoring Programme (NHMP) produces the monthly Hydrological Summary of the UK. This regular report describes the hydrological conditions during the preceding month, using the data holdings of the National River Flow Archive and National Groundwater Level Archive. Focusing on rainfall, river flows, groundwater levels, and reservoir stocks, it places the events of each month, and the conditions at the end of the month, in a historical context. 

Each report includes regional rainfall data - both recent and, where significant, longer-term accumulations for the major administrative divisions in the water industry. Also featured are maps and representative hydrographs of river flow and groundwater levels with supporting summary statistics and details of current stocks for a selection of major reservoirs. A commentary examines notable hydrological events and summarises both the national hydrological status and the water resources outlook. 

The Hydrological Summary is published on the 10th working day every month via this web-page, Twitter, and to those who have signed up to receive them by email. 


Sign up to receive the monthly Hydrological Summary by email.

Latest month 

The Hydrological Summary for the latest month can be downloaded at the below link:

Latest Hydrological Summary for the UK

The latest Hydrological Summary will also be available in the NERC Open Research Archive (NORA) and displayed in the below list soon after publication. 


Archived versions of the Hydrological Summary are available in pdf format from December 1988. To access hydrological summaries from the archive, please use the below list.

COSMOS-UK. Soil moisture: August 2019 View PDF on NORA
Reply to: Complexities between plants and the atmosphere View PDF on NORA
Global climate - lake surface temperature View PDF on NORA
Comparison of long-read sequencing technologies in the hybrid assembly of complex bacterial genomes View PDF on NORA
View PDF on NORA
Phosphorus mirabilis: illuminating the past and future of phosphorus stewardship View PDF on NORA
Exploring the usefulness of scenario archetypes in science-policy processes: experience across IPBES assessments View PDF on NORA
Adapting to socio-ecological pressures using sustainability science in Egyptian biosphere reserves View PDF on NORA
Using contact networks and next-generation sequencing for wildlife epidemiology View PDF on NORA
Illumination geometry and flying height influence surface reflectance and NDVI derived from multispectral UAS imagery View PDF on NORA
Windows of opportunity or windows of exclusion? Changing dynamics of tenurial relations in rural Ghana View PDF on NORA
Persistence and migration of tetracycline, sulfonamide, fluoroquinolone, and macrolide antibiotics in streams using a simulated hydrodynamic system View PDF on NORA