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Water table management on a watershed scale

R. O. Evans, J. E. Parsons, K. Stone and W. B. Wells
Journal of Soil and Water Conservation January 1992, 47 (1) 58-64;
R. O. Evans
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J. E. Parsons
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K. Stone
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W. B. Wells
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CROPS are grown on nearly 20 million acres of poorly drained soils along the Atlantic Coast and Gulf States (21). In many of these states, cropland drainage has been one of the most important components of land management, Many of these artificially drained soils are adjacent to environmentally sensitive and ecologically important estuarine waters.

Agricultural runoff has been implicated in the degradation of water quality and the potential destruction of many saline primary nursery areas (14,20). Agricultural production is important to the region, but it has become obvious that future agricultural practices must be designed and managed with water quality in mind.

Excessive soil water is a major concern on poorly drained soils. In humid regions, artificial drainage is necessary to facilitate seedbed preparation and planting (spring trafficability criteria) and to minimize yield reductions from anaerobiosis. In general, drainage systems have been designed to lower the water table sufficiently to satisfy extreme drainage conditions 80 percent of the time.

For most crops, there is an optimum planting date (22). Yields fall when planting is delayed past that date. The most extreme conditions, that is, the wettest periods, occur during the early spring in most years. During this period, evaporation …

Footnotes

  • R. O. Evans is an extension specialist and J. E. Parsons is an assistant professor, Biological and Agricultural Engineering Department, North Carolina State University, Raleigh, 27695-7625; K. Stone is an agricultural engineer at the Coastal Plains Soil and Water Conservation Research Center, Agricultural Research Service, US. Department of Agriculture, Florence, South Carolina 29503; and W B. Wells is state conservation engineer, Soil Con servation Service, USDA, Columbia, South Carolina 29701.

  • Copyright 1992 by the Soil and Water Conservation Society

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Journal of Soil and Water Conservation: 47 (1)
Journal of Soil and Water Conservation
Vol. 47, Issue 1
January/February 1992
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Water table management on a watershed scale
R. O. Evans, J. E. Parsons, K. Stone, W. B. Wells
Journal of Soil and Water Conservation Jan 1992, 47 (1) 58-64;

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Water table management on a watershed scale
R. O. Evans, J. E. Parsons, K. Stone, W. B. Wells
Journal of Soil and Water Conservation Jan 1992, 47 (1) 58-64;
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