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Influences of Spatial Scale and Soil Permeability on Relationships Between Land Cover and Baseflow Stream Nutrient Concentrations

Author

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  • F. Bernard Daniel

    (U.S. Environmental Protection Agency, National Exposure Research Laboratory, Office of Research and Development)

  • Michael B. Griffith

    (U.S. Environmental Protection Agency, National Center for Environmental Assessment, Office of Research and Development)

  • Michael E. Troyer

    (U.S. Environmental Protection Agency, National Center for Environmental Assessment, Office of Research and Development)

Abstract

The Little Miami River (LMR) basin, dominated by agriculture, contains two geologically-distinct regions; a glaciated northern till plain with soils three times more permeable than a southern, pre-Wisconsinan drift plain. The influences of two landscape measures, percent row crop cover (%RCC, computed at three spatial scales), and soil permeability (PERM), on baseflow nutrient concentrations were modeled using linear regressions. Quarterly water samples collected for four years were analyzed for nitrate-N (NN), Kjeldahl-N (KN), total-N (TN), and total-P (TP). In till plain streams (n = 17), NN concentrations were 8.5-times greater than drift plain streams (n = 18), but KN and TP were 20–40% lower at comparable %RCC. These differences resulted in TN/TP molar ratios >80 in till plain streams, but

Suggested Citation

  • F. Bernard Daniel & Michael B. Griffith & Michael E. Troyer, 2010. "Influences of Spatial Scale and Soil Permeability on Relationships Between Land Cover and Baseflow Stream Nutrient Concentrations," Environmental Management, Springer, vol. 45(2), pages 336-350, February.
    • Handle: RePEc:spr:envman:v:45:y:2010:i:2:d:10.1007_s00267-009-9401-x
    DOI: 10.1007/s00267-009-9401-x
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