Changing storage beneath a stationary water table—an anomaly of certain humified peats

J. M. B. Brown; H. A. P. Ingram

doi:10.1144/GSL.QJEG.1988.021.02.06

Abstract

Previously published seepage tube test results for well-humified peats at Dun Moss showed anomalous water transmission properties only partially explained by non-Darcian behaviour found in permeameter tests. In a new suite of seepage tube recovery tests it was found that the shape of the recovery curve varied with the time taken to establish the initial displacement. This variation, which is not associated with any movement of the water table, suggests that these peats possess a pressure-sensitive storage property consistent with the elastic behaviour of a wide range of aquifer materials of current interest to hydrogeologists. This interpretation is supported by comparison with the hydrogeological ‘slug test’ and by results from a special ‘re-fill’ variant of a recovery slug test. In these tests the water level was observed to decline spontaneously while below the equilibrium level, an effect explicable only by exchanges to storage.

References

1. Bouwer, H.
Bouwer, H. 1978. Groundwater Hydrology. McGraw-Hill, New York.
Brown, J. M. B., Ingram, H. A. P. & Waine, J. 1974. Recent experiments on water transmission and storage in humified peat. Paper presented at the Annual Meeting of the British Ecological Society Mires Research Group, University of Manchester.
1. Cooper, H. H., ,
2. Bredehoeft, J. D. ,
3. Papadopulos, I. S.
Cooper, H. H., Bredehoeft, J. D. & Papadopulos, I. S. 1967. Response of a finite-diameter well to an instantaneous charge of water. Water Resources Research, 3, 263–269.
OpenUrl PubMed
1. Davis, S. N. ,
2. De Wiest, R. J. M.
Davis, S. N. & De Wiest, R. J. M. 1966. Hydrogeology. Wiley, New York.
1. Ingram, H. A. P. ,
2. Gore, A. J. P.
Ingram, H. A. P. 1983. Hydrology. In: Gore, A. J. P. (ed. )Mires: Swamp, Bog, Fen and Moor, Vol. A. Elsevier, Amsterdam, 67–158.
1. Ingram, H. A. P., ,
2. Fojt, W. ,
3. Smart, P. J.
Ingram, H. A. P., Fojt, W. & Smart, P. J. 1985. Die Durchlässigkeitsmerkmale des Niedermoortorfes im Upton Fen. Telma, 15, 67–74.
OpenUrl
1. Ingram, H. A. P., ,
2. Rycroft, D. W. ,
3. Williams, D. J. A.
Ingram, H. A. P., Rycroft, D. W. & Williams, D. J. A. 1974. Anomalous transmission of water through certain peats. Journal of Hydrology, 22, 213–218.
OpenUrl CrossRef
Kirkham, D. 1945. Proposed method for field measurement of permeability of soil below the water table. Proceedings of the Soil Science Society of America, 10, 58–68.
1. Luthin, J. N. ,
2. Kirkham, D.
Luthin, J. N. & Kirkham, D. 1949. A piezometer method for measuring permeability of soil in situ below a water table. Soil Science, 68, 349–358.
OpenUrl Web of Science
Rycroft, D. W. 1971. On the hydrology of peat. PhD Thesis, University of Dundee.
1. Rycroft, D. W., ,
2. Williams, D. J. A. ,
3. Ingram, H. A. P.
Rycroft, D. W., Williams, D. J. A. & Ingram, H. A. P. 1975. The transmission of water through peat. II. Field experiments. Journal of Ecology, 63, 557–568.
OpenUrl CrossRef Web of Science
Waine, J. 1976. The hydraulic conductivity of humified peat. MSc Thesis, University of Dundee.
1. Waine, J., ,
2. Brown, J. M. B. ,
3. Ingram, H. A. P.
Waine, J., Brown, J. M. B. & Ingram, H. A. P. 1985. Non-Darcian transmission of water in certain humified peats. Journal of Hydrology, 82, 327–339.
OpenUrl CrossRef Web of Science
1. Youngs, E. G.
Youngs, E. G. 1968. Shape factors for Kirkham's piezometer method for determining the hydraulic conductivity of soil in situ for soils overlying an impermeable floor or infinitely permeable stratum. Soil Science, 106, 235–237.
OpenUrl Web of Science