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Fine-scale characteristics of groundwater flow in a peatland

✍ Scribed by J. Z. Drexler; B. L. Bedford; R. Scognamiglio; D. I. Siegel

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
431 KB
Volume
13
Category
Article
ISSN
0885-6087

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✦ Synopsis

Fine-scale dynamics of groundwater ¯ow were studied in a 1 . 5 ha peatland in central New York. Measurements of the hydraulic head throughout a detailed network of piezometer clusters revealed spatial and temporal variability in the direction of groundwater ¯ow at a very ®ne (within a few metres) scale of analysis. Within the small wetland, there were areas of groundwater recharge, discharge and lateral ¯ow. Such patterns of groundwater ¯ow frequently reversed or changed due to ¯uctuations of only a few centimetres in hydraulic head. Speci®c conductance, deuterium signatures and calcium concentrations of groundwater corroborated the groundwater ¯ow patterns determined with hydraulic head measurements and illustrated the in¯uence of source water chemistry and evaporation on dierent layers in the peat column. The control of peat chemistry by such ®ne-scale groundwater ¯ow may have important implications for plant community composition and diversity in groundwater-fed peatlands.

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