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Well-point techniques and the shallow water table in boulder clay

Visvalingam, M.; Visvalingam, Maheswari


M. Visvalingam

Maheswari Visvalingam


The reliability of water-table measurements in clay soil is currently under review (Twocock, 1971; Bonell, 1971; Visvalingam, 1972). This paper summarizes some of the experimental results from a boulder clay catchment in East Yorkshire. The experiments investigated the functioning characteristics of cased auger holes and piezometers in clay soil and compared the results with observations made with a neutron moisture probe. It appears that well-point technique, especially piezometers, are extremely unreliable in clay soil. The measured water level is demonstrated to be influenced by not only the position of the ‘water table’ but also the permeability of the soil; in which context the type, diameter, and length of tubing, as well as the time of installation, become important considerations.


Visvalingam, M., & Visvalingam, M. (1974). Well-point techniques and the shallow water table in boulder clay. The Journal of soil science, 25(4), 505-516. doi:10.1111/j.1365-2389.1974.tb01145.x

Journal Article Type Article
Online Publication Date Jul 28, 2006
Publication Date 1974-12
Deposit Date Oct 28, 2015
Publicly Available Date Nov 23, 2017
Journal Journal of soil science
Print ISSN 0022-4588
Electronic ISSN 1365-2389
Peer Reviewed Not Peer Reviewed
Volume 25
Issue 4
Pages 505-516
Keywords Well-point technique
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Publisher URL
Copyright Statement ©2006, John Wiley and Sons
Additional Information These articles are posted for personal research purposes only. If you wish to reuse material from these articles for any other purpose, please seek permission from Wiley.


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