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Published in J Environ Qual 5:386-391 (1976)
© 1976 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Nitrate Dynamics in Fall Creek, New York1

Arthur H. Johnson, David R. Bouldin, Edward A. Goyette and Anne M. Hedges2

ABSTRACT

Nitrate loss from a 330-km2 rural watershed in central New York was monitored over a 31-month period. Seasonal NO3-N patterns were well defined with highest levels in the winter and lowest levels in the summer resulting from accumulation of NO3-N in the soil profile during the growing season and leaching during the winter months. Stream water at the outlet of the watershed studied is used as a source of drinking water for some 20,000 people. Nitrate-N concentrations at the drinking water intake currently do not exceed 3 mg/liter. Human activities affected NO3-N levels, with dairying and sewage being the major contributors. If agriculture is expanded to its maximum acreage, keeping the present ratio of corn/hay/pasture/people, NO3-N levels at the drinking water intake will not exceed present standards for drinking water.

Key Words: nonpoint sources • water quality • nitrate loss

NOTES

1 Contribution from Cornell Univ., Ithaca, NY 14850. This research was supported in part by funds from the Rockefeller Found. Grant RF70103 and in part by funds from the U. S. Environ. Prot. Agency and the State of New York. The latter portion of the study was carried out as part of Task C Activ. of the Pollut. from Land Use Activ. Ref. Group, Int. Joint Comm.

2 Formerly Graduate Assistant, now Assistant Professor of Regional Planning, Univ. of Pennsylvania, Philadelphia, PA 19174; Professor of Soil Science, Experimentalist, and Lab Technician, respectively.

Received for publication October 8, 1975.




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