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.

Diets of European polecat Mustela putorius in Great Britain during fifty years of population recovery View PDF on NORA
Implementation of U.K. Earth system models for CMIP6 View PDF on NORA
Diffusion of electronic water payment innovations in urban Ghana. Evidence from Tema metropolis View PDF on NORA
Time-series satellite imagery demonstrates the progressive failure of a city master plan to control urbanization in Abuja, Nigeria View PDF on NORA
Hydrological summary for the United Kingdom: March 2020 View PDF on NORA
Quantifying the controls on evapotranspiration partitioning in the highest alpine meadow ecosystem View PDF on NORA
Improving crop production and water productivity using a new field drip irrigation design View PDF on NORA
Predicting the water requirement, soil moisture distribution, yield, water productivity of peas and impact of climate change using SALTMED model View PDF on NORA
Insights on the functions and ecophysiological relevance of the diverse carbonic anhydrases in microalgae View PDF on NORA
Using the Eco-Erosion Index to assess regional ecological stress due to urbanization – a case study in the Yangtze river delta urban agglomeration View PDF on NORA
Mineralization and nitrification: Archaea dominate ammonia-oxidising communities in grassland soils View PDF on NORA
A global database of soil nematode abundance and functional group composition View PDF on NORA