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Sediment yields in lowland Scotland derived from reservoir surveys

Published online by Cambridge University Press:  03 November 2011

Robert W. Duck  and
John McManus
Robert W. Duck
Affiliation:
Department of Geology, The University, Dundee DD1 4HN, Scotland, U.K.
John McManus
Affiliation:
Department of Geology, The University, Dundee DD1 4HN, Scotland, U.K.
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Abstract

The sediments on the floors of nine reservoirs in the Midland Valley of Scotland have been examined to establish rates of sedimentation and catchment sediment yields. Information from Cullaloe, Drumain, Harperleas and Lambieletham Reservoirs (Fife), is compared with data from Glenfarg and Glenquey Reservoirs (Tayside) and earlier studies on Hopes, N Esk (Lothian) and Kelly (Strathclyde) Reservoirs. The earth-fill dams were constructed between 1850 and 1935 below catchments ranging from 1·53 to 23·5 km2 in area. They are situated on sedimentary, volcanic or intrusive igneous rocks mainly of Devonian or Carboniferous age. In most areas bedrock is obscured by mantles of drift. Six of the catchments are dominated by moorland terrain with local afforestation. Mixed arable farming and woodland characterise the remainder. The higher basins receive on average over 1400 mm of precipitation per annum, while in the lower basins some 800 mm falls.

Measurements of thickness variations of the deposits have enabled the construction of isopachyte maps from which the volumes of entrapped materials have been derived. The computed catchment sediment yields vary from 2·l t km−2 yr−1 (Lambieletham) to 52·0 t km−2 yr−1 (Glenfarg). Sediments incorporate both mineral and organic matter, of which combustible material commonly forms 15–20% by weight. Siliceous tests of diatoms are also an important component of the deposits. The sediment yields computed are about an order of magnitude greater than those reported from rivers draining similar sizes of catchment within the Forth basin. There is a direct relationship between mean annual inflow to the reservoirs and sediment yield.

Keywords

capacity lossisopachyte mapsland useMidland Valleyorganic mattersedimentationtrap efficiency.
Type
Sediment transport
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 78 , Issue 4: Hydrology in Scotland , 1987 , pp. 369 - 377
Copyright
Copyright © Royal Society of Edinburgh 1987

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References

Al-Ansari, N. A. & McManus, J. 1979. Fluvial sediments entering the Tay estuary: sediment discharge from the River Earn. SCOTT J GEOL 15, 203–216.CrossRefGoogle Scholar
Al-Bayati, K. M. & McManus, J. 1984a. The bathymetry and sedimentology of Loch Benachally, Perthshire. SCOTT J GEOL 20, 65–71.CrossRefGoogle Scholar
Al-Bayati, K. M. & McManus, J. 1984b. Suspended sediment load transport in the River Eden, Scotland. J WATER RESOUR 3, 232–248.Google Scholar
Al-Jabbari, M. H., McManus, J. & Al-Ansari, N. A. 1980. Sediment and solute discharge into the Tay estuary from the river system. PROC R SOC EDINBURGH 78B, 15–32.Google Scholar
Brune, G. M. 1953. Trap efficiency of reservoirs. TRANS AM GEOPHYS UNION 34, 407–418.Google Scholar
Cummins, W. A. & Potter, H. R. 1967. Rate of sedimentation in Cropston Reservoir, Charnwood Forest, Leicestershire. MERCIAN GEOL 2, 31–39.Google Scholar
Dean, W. E. 1974. Determination of carbonate and organic matter in calcareous sediments and sedimentary rocks by loss on ignition: comparison with other methods. J SEDIMENT PETROL 44, 242–248.Google Scholar
Duck, R. W. & McManus, J. 1984. A marker horizon in reservoir sediment cores resulting from wartime agricultural changes in central Scotland. SCOTT GEOG MAG 100, 184–189.Google Scholar
Duck, R. W. & McManus, J. 1986a. Applications of geophysical techniques in the understanding of reservoir siltation. J WATER RESOUR 5, 267–278.Google Scholar
Duck, R. W. & McManus, J. 1986b. Recognition of sediment instabilities in reservoirs using sidescan sonar and other geophysical techniques. In Wang, S. Y., Shen, H. W. & Ding, L. Z. (eds) Proceedings of the third international symposium on river sedimentation, 1312–1319, The University of Mississippi, U.S.A.Google Scholar
Ferguson, R. I. 1986. River loads underestimated by rating curves. WATER RESOUR RES 22, 74–76.CrossRefGoogle Scholar
Ferguson, R. I. 1987. Accuracy and precision of methods for estimating river load. EARTH SURF PROC LANDF 12, 95–104.CrossRefGoogle Scholar
Fleming, G. 1970. Sediment balance of the Clyde estuary. J HYDRAUL DIV, PROC ASCE 96, 2219–2230.Google Scholar
Folk, R. L. 1954. The distinction between grain size and mineral composition in sedimentology rock nomenclature. J GEOL 62, 344–359.CrossRefGoogle Scholar
Folk, R. L. 1974. Petrology of sedimentary rocks. Austin, Texas: Hemphill.Google Scholar
Ledger, D. C., Lovell, J. P. B. & McDonald, A. T. 1974. Sediment yield studies in upland catchment areas in south-east Scotland. J APPL ECOL 11, 201–206.CrossRefGoogle Scholar
Ledger, D. C., Lovell, J. P. B. & Cuttle, S. P. 1980. Rate of sedimentation in Kelly Reservoir, Strathclyde. SCOTT J GEOL 16, 281–285.CrossRefGoogle Scholar
Lovell, J. P. B., Ledger, D. C., Davies, I. M. & Tipper, J. C. 1973. Rate of sedimentation in North Esk Reservoir, Midlothian. SCOTT J GEOL 9, 57–61.CrossRefGoogle Scholar
McManus, J. 1986. Land derived sediment and solute transport to the Forth and Tay estuaries, Scotland. J GEOL SOC LOND 143, 927–934.CrossRefGoogle Scholar
McManus, J. & Duck, R. W. 1985. Sediment yield estimated from reservoir siltation in the Ochil Hills, Scotland. EARTH SURF PROC LANDF 10, 193–200.CrossRefGoogle Scholar
Walling, D. E. & Webb, B. W. 1981. The reliability of suspended sediment load data. In Erosion and sediment transport measurement, (Proceedings of the Florence Symposium), IAHS PUBL 133, 177–194.Google Scholar
Young, A. 1958. A record of the rate of erosion on Millstone Grit. PROC YORKS GEOL SOC 31, 149–156.CrossRefGoogle Scholar