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Titolo:
Simulating dispersive mixing in large peatlands
Autore:
Reeve, AS; Siegel, DI; Glaser, PH;
Indirizzi:
Univ Maine, Dept Geol Sci, Orono, ME 04469 USA Univ Maine Orono ME USA 04469 v Maine, Dept Geol Sci, Orono, ME 04469 USA Syracuse Univ, Dept Earth Sci, Syracuse, NY 13244 USA Syracuse Univ Syracuse NY USA 13244 ept Earth Sci, Syracuse, NY 13244 USA Univ Minnesota, Limnol Res Ctr, Minneapolis, MN 55455 USA Univ Minnesota Minneapolis MN USA 55455 es Ctr, Minneapolis, MN 55455 USA
Titolo Testata:
JOURNAL OF HYDROLOGY
fascicolo: 1-2, volume: 242, anno: 2001,
pagine: 103 - 114
SICI:
0022-1694(20010215)242:1-2<103:SDMILP>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
LAKE AGASSIZ PEATLANDS; LOST RIVER PEATLAND; NORTHERN MINNESOTA; HYDRAULIC CONDUCTIVITY; SOLUTE TRANSPORT; GROUNDWATER-FLOW; PATTERNED MIRES; COASTAL MARSH; PORE-WATER; VEGETATION;
Keywords:
peatland; solute transport; ground-water; bogs; dispersion; simulation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Engineering, Computing & Technology
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Reeve, AS Univ Maine, Dept Geol Sci, Orono, ME 04469 USA Univ Maine OronoME USA 04469 ept Geol Sci, Orono, ME 04469 USA
Citazione:
A.S. Reeve et al., "Simulating dispersive mixing in large peatlands", J HYDROL, 242(1-2), 2001, pp. 103-114

Abstract

Numerical simulations indicate that mechanical dispersive mixing can be the dominant mass transport mechanism in large peatlands. Dispersive mixing driven by lateral flow can drive solute fluxes from the mineral soil upward to the peat surface and thereby explain observed patterns of bug and fen inlarge peatlands. Longitudinal and transverse dispersivities of only 0.5 and 0.05 m, respectively, were sufficient to supply solutes to the peat surface in the absence of upward ground-water flow. Incorporation of hydrodynamic dispersion in peatland systems explains apparent contradictions in solutemigration in peatlands, allowing the simultaneous downward flux of labile carbon (i.e. root exudates) produced at the peat surface and upward migration of inorganic solutes from the underlying mineral soil. Previous models of peatland hydrogeochemistry that rely on advection alone as the dominant process for solute transport may therefore be inadequate to explain fully the hydrology, geochemistry, and evolution of large peatlands. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 11:07:41