Abstract
A quantitative understanding of the factors controlling the variation of dissolved organic carbon (DOC) in headwater streams is of scientific concern for at least two reasons. First, quantifying the overall carbon budgets of lotic systems is needed for a fundamental understanding of these systems. Second, DOC interacts strongly with other dissolved substances (heavy metals in particular) and plays an important role in the transport of contaminants.
In the Snake River near Montezuma, Colorado, measurements of DOC from 1980 to 1986 show rapid decreases in concentration from a peak very early in the snowmelt period. Peak DOC concentrations occur approximately one month prior to peak discharge in the stream. The decline in DOC with time is approximately exponential, suggesting that a simple flushing mechanism can explain the response. We examined hydrological mechanisms to explain the observed variability of DOC in the Snake River by simulating the hydrological response of the catchment using TOPMODEL and routing the predicted flows through a simple model that accounted for temporal changes in DOC. Conceptually the DOC model represents a terrestrial (soil) reservoir in which DOC builds up during low flow periods and is flushed out by infiltrating meltwaters. The model reproduces the main features of the observed variation in DOC in the Snake River and thus lays the foundation for quantitatively linking hydrological processes with carbon cycling through upland catchments. Model results imply that a significant fraction of the soils in the Snake River catchment contribute DOC to the stream during peak discharge. Our work represents one of the first attempts to quantitatively describe the hydrological controls on DOC dynamics in a headwater stream. These controls are studied through the model by imposing mass balance constraints on both the flux of water through the various DOC source areas and the amount of DOC that can accumulate in these areas.
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References
Baron J, McKnight D & Denning AS (1991) Sources of dissolved and particulate organic material in Loch Vale watershed, Rocky Mountain National Park, Colorado, USA, Biogeochemistry 15: 89–110
Beven KJ & Kirkby MJ (1979) A physically based, variable contributing area model of basin hydrology. Hydrological Sciences Bull. 24: 43–69
Beven KJ & Wood EF (1983) Catchment geomorphology and the dynamics of runoff contributing areas, J. Hydrol., 65: 139–158
Bras RL (1990) Hydrology, Addison-Wesley, Reading, MA, 643 p
Cosby BJ, Hornberger GM, Wolock, DM & Ryan PF (1987) Calibration and coupling of conceptual rainfall-runoff/chemical flux models for long-term simulation of catchment response to acidic deposition. In: Back MB(Ed) Systems Analysis in Water Quality Management (pp 151–160). Pergamon Press, Oxford
Cronan CS (1990) Patterns of organic acid transport from forested watersheds to aquatic ecosystems. In: Perdue EM & Gjessing ET(Eds) Organic Acids in Aquatic Ecosystems (pp 245–260). John Wiley and Sons, New York
Cronan CS & Aiken AR (1985) Chemistry and transport of soluble humic substances in forested watersheds of the Adirondack Park, New York. Geochim. Cosmochim. Acta 49: 1697–1705
Denning AS, Baron J, Mast MA & Arthur M (1991) Hydrologic pathways and chemical composition of runoff during snowmelt in Loch Vale watershed, Rocky Mountain National Park, Colorado, USA. Water, Air, and Soil Pollution 59: 107–123
Dever KS (1970) Peak flow — snowmelt events. In: Gray DM (Ed) Handbook on the Principles of Hydrology (Section IX, pp 9.1–9.25). Water Information Center, Port Washington, NY
Fiebig DM, Lock MA & Neal C (1990) Soil water in the riparian zone as a source of carbon for a headwater stream. J. Hydrology 116: 217–237
Foster IDL & Grieve IC (1982) Short term fluctuations in dissolved organic matter concentrations in streamflow draining a forested watershed and their relation to the catchment budget, Earth Surf. Proc. and Landforms 7: 417–425
Grieve IC (1991) A model of dissolved organic carbon concentrations in soil and stream waters. Hydrological Processes 5: 301–307
Hamon WR (1961) Estimating potential evapotranspiration. J. Hydraulics Divisions, ASCE 87: 107–120
Hornberger GM, Beven KJ, Cosby BJ & Sappington DE (1985) Shenandoah watershed study: calibration of a topography-based, variable contributing area hydrological model to a small forested catchment. Water Resources Research 21: 1841–1850
Jenson SK & Domingue JO (1988) Extracting topographic structure from digital elevation data for geographic information system analysis. Photogrammetric Engineering and Remote Sensing 54: 1593–1600
Johnson NM, Likens GE, Bormann FH, Fisher DW & Pierce RS (1969) A working model for the variation in stream water chemistry at the Hubbard Brook Experimental Forest, New Hampshire. Wat. Resour. Res. 5: 1353–1363
Leenheer JA & Huffman EW Jr (1979) Analytical method for dissolved-organic carbon fractionation. US Geological Survey Water Resources Investigations 78-4, 16 p
Lewis WM Jr & Grant MC (1979) Relationships between stream discharge and yield of dissolved substances from a Colorado Mountain watershed. Soil Science 128: 353–363.
Lovering TS (1935) Geology and ore deposits of the Montezuma quadrangle, Colorado, US Geological Survey Professional Paper 178
McKnight DM & Bencala KE (1990) The chemistry of iron, aluminum, and dissolved organic material in three acidic, metal-enriched, mountain streams, as controlled by watershed and in-stream processes. Wat. Resour. Res. 26: 3087–3100
McKnight DM, Smith RL, Harnish RA, Miller CL & Bencala KE (1993) Seasonal relationships between planktonic microorganisms and dissolved organic material in an alpine stream. Biogeochemistry 21: 39–59
Morris EM (1985) Snow and ice. In: Anderson MP & Burt TP (Eds) Hydrologic Forecasting (pp 153–182). John Wiley & Sons Ltd., Chichester
Mulholland PJ (1981) Organic carbon flow in a swamp-stream ecosystem. Ecological Monographs 51: 307–322
Robson A & Neal C (1991) Chemical signals in an upland catchment in mid-Wales — some implications for water movement. BHS 3rd National Hydrology Symposium, Southhampton, pp 3.17–3.24
Schiff SL, Aravena R, Trumbore SE & Dillon PJ (1990) Dissolved organic carbon cycling in forested watersheds: a carbon isotope approach. Wat. Resour. Res. 26: 2949–2957
Wallis PM (1979) Sources, transportation, and utilization of dissolved organic matter in groundwater and streams. Kananaskis Centre for Environmental Research, University of Calgary, Scientific Eries No. 100
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Hornberger, G.M., Bencala, K.E. & McKnight, D.M. Hydrological controls on dissolved organic carbon during snowmelt in the Snake River near Montezuma, Colorado. Biogeochemistry 25, 147–165 (1994). https://doi.org/10.1007/BF00024390
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DOI: https://doi.org/10.1007/BF00024390