Anisotropy and depth-related heterogeneity of hydraulic conductivity in a bog peat. I: laboratory measurements
Article first published online: 13 NOV 2002
Copyright © 2002 John Wiley & Sons, Ltd.
Volume 17, Issue 1, pages 89–101, January 2003
How to Cite
Beckwith, C. W., Baird, A. J. and Heathwaite, A. L. (2003), Anisotropy and depth-related heterogeneity of hydraulic conductivity in a bog peat. I: laboratory measurements. Hydrol. Process., 17: 89–101. doi: 10.1002/hyp.1116
- Issue published online: 19 DEC 2002
- Article first published online: 13 NOV 2002
- Manuscript Accepted: 25 MAR 2002
- Manuscript Received: 20 AUG 2001
- bog peat;
- hydraulic conductivity;
- modified cube method
Anisotropy and heterogeneity of hydraulic conductivity (K) are suspected of greatly affecting rates and patterns of ground-water seepage in peats. A new laboratory method, termed here the modified cube method, was used to measure horizontal and vertical hydraulic conductivity (Kh and Kv) of 400 samples of bog peat. The new method avoids many of the problems associated with existing field and laboratory methods, and is shown to give relatively precise measurements of K. In the majority of samples tested, Kh was much greater than Kv, indicating that the bog peat was strongly anisotropic. Log10Kh, log10Kv, and log10 (Kh/Kv) were found to vary significantly with depth, although none of the relationships was simple. We comment on the scale dependency of our measurements. Copyright © 2002 John Wiley & Sons, Ltd.