Scale dependence of the episodic hydrochemical response of nested catchments at Plynlimon

Hydrology and Earth System Sciences

Volumn 1, Issue 3, 1997, Pages 639-651

  Foster, Helen J ^a   Alexander, Sarah ^a   Locks, Tanya ^a   Wheater, Howard S ^a   Lees, Matthew J ^a   Reynolds, Brian ^b  

^a IMPERIAL COLLEGE LONDON   (United Kingdom)

^b CENTRE FOR ECOLOGY AND HYDROLOGY   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000854753     PISSN: 10275606     EISSN: None     Source Type: Journal    
DOI: 10.5194/hess-1-639-1997     Document Type: Article

References (33)

1. Alexander, S., 1997. Hydrochemical relationships between soils and stream-water - an experimental investigation. M. Phil. Thesis, Imperial College of Science, Technology and Medicine, University of London. 172pp.
2. Beck, M. B., Kleissen, F. M. and Wheater, H. S., 1990. Identifying flowpaths in models of surface water acidification. Revs. Geophys., 28, 207-289.
3. Chapman, P.J., Reynolds, B. and Wheater, H.S., 1993. Hydrochemical changes along stormflow pathways in a small moorland headwater catchment in Mid-Wales, UK. J. Hydrol., 151, 241-265.
4. Chapman P.J., 1994. Hydrogeochemical processes influencing episodic stream water chemistry in a small headwater catchment, Plynlimon, mid-Wales. Ph.D. Thesis, Imperial College of Science, Technology and Medicine, University of London. 416pp.
5. Christophersen, N., Neal, C., Hooper, R. P., Vogt, R. D. and Andersen, S., 1990. Modelling streamwater chemistry as a mixture soilwater end-members - A step towards second-generation acidification models. .J. Hydrol., 116, 307-320.
6. Davies, T.D., Tranter, M., Wigington, P.J. and Eshleman, K.N., 1992. 'Acid Episodes' in surface waters in Europe. J. Hydrol., 132, 25-69.
7. Dougan, W.K. and Wilson, A.L., 1974. The absorptiometric determination of aluminium in water: a comparison of some chromogenic reagents and the development of an improved method. Analyst, 99, 413-430.
8. Harriman, R., Likens, G.E., Hultberg, H. and Neal, C., 1994. Influence of management practices in catchments on freshwater acidification: Afforestation in the United Kingdom and North America. In: Acidification of freshwater ecosystems: Implications for the future. Ed. C.E.W. Steinberg and R.F. Wright, pp. 83-101. Wiley, Chichester, UK.
9. Hill, T. and Neal, C., 1997. Spatial and temporal variation in pH, alkalinity and conductivity in surface runoff and groundwater for the Upper River Severn Catchment, Mid-Wales. Hydrol. Earth System Sci., 1, 697-715.
10. Hutchins, M.G., Wheater, H.S. and Beck, M.B., 1995. The role of natural tracers in the understanding of catchment hydrochemistry within a conceptual hydrological framework. In: Tracer Technologies for Hydrological Systems. Proc. Boulder Symp. IAHS Publn. No. 229; 267-276.
11. Hughes, S., Reynolds, B. and Roberts, J.D., 1990. The influence of land management on concentrations of dissolved organic carbon and its effects on the mobilization of aluminium and iron in podzol soils in Mid-Wales. Soil Use Manag., 6, 137-145.
12. Kirby, C., Newson, M.D. and Gilman, K., 1991. Plynlimon research: The first two decades. Institute of Hydrology Report No. 109. Institute of Hydrology, Wallingford, UK.
13. Locks, T., 1996. Spatial and Temporal Variation of Stream Water Chemistry at the Plynlimon Catchments. M.Sc. Thesis, Imperial College of Science, Technology and Medicine, University of London. 70pp.
14. Muscutt, A. D., Reynolds, B. and Wheater, H.S., 1993. Sources and controls of Al in storm runoff from a headwater catchment in mid-Wales. J. Hydrol., 142, 409-425.
15. Neal, C., Fisher, R., Smith, C.J., Hill, T, Neal, M., Conway, T., Ryland, G.P. and Jeffrey, H.A., 1992a. The effects of tree harvesting on stream-water quality at an acidic and acid-sensitive spruce forested area: Plynlimon, mid-Wales. J. Hydrol., 135, 305-319.
16. Neal, C., Reynolds, B., Smith, C. J., Hill, S., Neal, M., Conway, T., Ryland, G.P., Jeffrey, H., Robson, A.J. and Fisher, R., 1992b. The impact of conifer harvesting on stream water pH, alkalinity and aluminium concentrations for the British uplands: an example for an acidic and acid sensitive catchment in mid-Wales. Sci. Tot. Environ, 126, 75-87.
17. Neal, C., Neal, M., Ryland, G.P., Jeffery, H.A., Harrow, M., Hill, S. and Smith, C.J., 1994. Chemical variations in near surface drainage water for an acidic spruce forested UK upland area subjected to timber harvesting: inferences on cation exchange processes in the soil. Sci. Tot. Environ., 154, 47-61.
18. Neal, C., Hill, T., Alexander, S., Reynolds, B., Hill, S., Dixon, A.J., Harrow, M., Neal, M. and Smith, C.J., 1997a. Stream water quality in acid sensitive UK upland areas, an example of potential water quality remediation based on groundwater manipulation. Hydrol. Earth System Sci., 1, 185-196.
19. Neal, C., Robson, A.J., Shand, P., Edmunds, W.M., Dixon, A.J., Buckley, O.K., Hill, S., Harrow, M., Neal, M. and Reynolds, B., 1997b. The occurrence of groundwater in the Lower Palaeozoic rocks of upland Central Wales. Hydrol. Earth System Sci., 1, 3-18.
20. Neal, C., Hill, T., Hill, S. and Reynolds, B., 1997c. Acid neutralization capacity measurements in surface and ground waters in the Upper River Severn, Plynlimon: from hydrograph splitting to water flow pathways. Hydrol. Earth System Sci., 1, 687-696.
21. Newson, M.D., 1979. A ten year climate record from the Welsh uplands. J. Meteorol., 14, 1-6.
22. Ormerod, S.J., Donald, A.P. and Brown, S.J., 1989. The influence of plantation forestry on the pH and aluminium concentration of upland Welsh streams: A re-examination. Environ. Pollut. 62, 47-62.
23. Ormerod, S.J. and Jenkins, A., 1994. The biological effects of acid episodes. In: Acidification of freshwater ecosystems: Implications for the future. Ed. C.E.W. Steinberg and R.F. Wright, pp. 259-272. Wiley, Chichester, UK.
24. Reynolds, B., Neal, C., Hornung, M. and Stevens, P.A., 1986. Base-flow buffering of stream-water acidity in five mid-Wales catchments. J. Hydrol., 87, 167-185.
25. Reynolds, B, Neal, C., Hornung, M., Hughes, S. and Stevens, P. A., 1988. Impact of afforestation on the soil solution chemistry of stagnopodzols in mid-Wales. Wat. Air, Soil Pollut., 38, 55-70.
26. Reynolds, B and Hughes, S., 1989. An ephemeral forest drainage ditch as a source of aluminium to surface waters. Sci. Tot. Environ., 80, 185-193.
27. Reynolds, B., Stevens, P.A., Hughes, S., Parkinson, J.A. and Weatherley, N.S., 1995. Stream chemistry impacts of conifer harvesting in Welsh catchments. Wat. Air, Soil Pollut., 79, 147-170.
28. Robson, A. and Neal, C., 1990. Hydrograph separation using chemical techniques: An application to catchments in mid-Wales. J. Hydrol., 116, 345-363.
29. Robson, A.J., Neal, C., Smith, C.J. and Hill, S., 1992. Short term variations in rain and streamwater conductivity at a forested site in mid-Wales-implications for water movement. Sci. Tot. Environ., 119, 1-18.
30. Robson, A.J., Neal, C., Hill, S. and Smith, C.J., 1993. Linking variations in short- and medium-term stream chemistry to rainfall inputs - some observations at Plynlimon, mid-Wales. J. Hydrol., 144, 291-310.
31. UK Acid Waters Review Group, 1988. Acidity in the United Kingdom Fresh Waters. Second Report. Her Majesty's Stationary Office, London, pp. 1-61.
32. Wheater, H.S., Kleissen, P.M., Beck, M.B., Tuck, S., Jenkins, A. and Harriman, R., 1990. Modelling short-term flow and chemical response in the Allt a' Mharcaidh catchment. In: The Surface Waters Acidification Programme, Ed. B.J. Mason, pp. 477-483. Cambridge University Press.
33. Wheater, H.S., Tuck, S., Ferner, R.C., Jenkins, A., Kleissen, P.M., Walker, T.A. and Beck, M.B., 1993. Hydrological flow paths at the AIIt a' Mharcaidh catchment. Hydrol. Processes, 7, 359-371.