Herschy, Reg

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Reg Herschy


Reginald W. Herschy 1926 - 2012


Reg Herschy was one of the most influential pioneers of modern hydrometry, developing many of the gauging methods — including the ultrasonic technique — which are commonplace today. More so than any other individual he was responsible for transforming the very patchy scattering of UK gauging stations in the 1960s into the comprehensive network which now underpins water management and hydrological science.

Reg was a prolific author and his books ‘Hydrometry’ and ‘Streamflow Measurement’ remain key reference sources throughout the UK and in many other parts of the world. For many years Reg was Chairman of the BSI committee for Hydrometry and in this role he not only represented the UK but wrote and influenced many of the International Standards on Hydrometry where he was a member of the Technical Committee for Hydrometry.

Before climate change began its rapid rise up the public and political agendas, Reg was one of the first to recognise that identifying changes in runoff patterns was a key strategic role for hydrometric networks. Correspondingly, Reg had an abiding commitment to rigorous standards of hydrometric field practices and data stewardship. He was much admired by members of the global hydrometric community and it is very appropriate that his memorial stands besides the Thames – which boasts one of the longest continuous flow records in the world

A memorial has been erected at Teddington Lock on the River Thames

Hydrological Achievements[edit]

Provided reference texts and developed international standards for hydrometric methods.

Reference Material[edit]

Roger Bailey and Terry Marsh, 2014, In Memoriam Reg Herschy, Circulation, 122: 1 PDF

Major Publications[edit]


Herschy, R W, 2008, Streamflow Measurement 3rd edition, Routledge, Taylor and Francis group. ISBN 978-0-415-4132-8.

Herschy, R W (ed.), 1998, Hydrometry Principles and Practice, 2nd edition, John Wiley and Sons ISBN: 978-0-471-97350-8

Herschy, R W (ed.), 2004, World Catalogue of Maximum Observed Floods, IAHS Publication 284.

Herschy, R.W. and Fairbridge, R.W. (eds.), 1998. Encyclopedia of hydrology and water resources. Springer Science & Business Media.


Herschy, R.W., 2002. The world’s maximum observed floods. Flow Measurement and instrumentation, 13(5), pp.231-235.

Herschy, R.W., 2002. The uncertainty in a current meter measurement. Flow Measurement and Instrumentation, 13(5), pp.281-284.

Harrison, A.J.M., MONTES, S., MANNING, A., HALLIWELL, A., WILLIAMS, J., MARKLAND, E., ALLEN, J., HILL, J., BUNT, E., ABBOTT, M. and SMITH, C., 1969. The streamlined broad-crested weir. Proceedings of the Institution of Civil Engineers, 42(4), pp.575-599.

Hershey, R W, 1971 The magnitude of errors at flow measurement stations, IAHS Publication 99 PDF

Barrett, E.C., Beaumont, M.J. and Herschy, R.W., 1990. Satellite remote sensing for operational hydrology: present needs and future opportunities. Remote Sensing Reviews, 4(2), pp.451-466.

Herschy, R.W., 1976. New methods of river gauging. in Rodda, J, Facets of hydrology.


ISO TC 113 Technical Committee on Hydrometry