The Irrigation and Water Forum is the United Kingdom’s national section of the International Commission on Irrigation and Drainage (ICID). We focus on water resources, including agricultural development, in the context of sustainable river basin management, both nationally and internationally.

Growing populations, higher socio-economic demands, water mismanagement, and the impact of climate change are increasing competition between water users. With over 800 million people suffering from chronic hunger, and 1.1 billion people lacking access to water, water and food security are on the world agenda. To get involved in the discussion, find us on twitter (@iwaterforum), join us at one of our events, or sign up as a member now.

Through the IWF, you can enjoy a lively programme of meetings and events on all aspects of water resources throughout the year as well as technical visits and other events. Keep up to date with ‘News and Views’ – a bulletin circulated for our members – and access the internationally renowned journal ‘Irrigation and Drainage’.


Tea Time Talk: COSMOS, Scintillometer & Eddy Cov New Technologies to save Irrigation Water

RRWednesday 23rd June 2021, 4pm to 5.30pm (BST) – Online Event

Speaker: Dr Ragab Ragab, President ICID

Members and non members of IWF are welcome to attend the meeting.

Free of charge. Please register here. Attendance is limited to 100. 

Accurate estimation of irrigation water requirements could save water and minimize losses, allowing more land to be irrigated and subsequently more food to be produced. Irrigation practitioners have always faced the challenge of “when to irrigate and how much water to apply”. To answer those questions several methods have been developed, ranging from measurement based to empirical and energy balance equation based approaches. The accuracy of those methods and the scale they represent are of great importance. 

Modern technologies to measure actual evapotranspiration and subsequently the crop water requirement, such as large-aperture Scintillometer and Eddy Covariance instruments were tested and compared with the most common method of the FAO modified Penman–Monteith equation. The results indicate that the actual crop water requirement based on modern technologies could save at least 50% of irrigation water. Another benefit is that these modern technologies do not need the crop coefficient Kc, which for many irrigation practitioners is difficult to obtain. In addition, the cosmic-ray soil moisture observing system (COSMOS) was tested for its suitability in estimating the soil moisture deficit (SMD) and subsequently, the crop water requirement. The results showed that the COSMOS measurements could be useful for monitoring the soil water status and SMD in the root zone in irrigated agriculture and could be made operational for irrigation managers to determine when and how much irrigation water to apply.

Please register here.


Mekong River Basin

November 2021, Institution of Civil Engineers, Westminster, London

More details to follow.