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Published in J Environ Qual 10:148-153 (1981)
© 1981 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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The Response of a Southern Appalachian Forest to Waste Water Irrigation1

G. H. Brister and R. C. Schultz2

ABSTRACT

The operational land treatment system at Unicoi State Park near Helen, Georgia was used for a period of 3 years to study the role of a mature Appalachian forest in renovating municipal waste water. Uptake of some of the nutrients in the waste water was occurring in the vegetation, but no systematic nutrient uptake by any one component of the stand was observed. Overstory trees failed to show any growth response to the irrigation in height or diameter at breast height (dbh), but did show increased stem diameter growth within the canopy. The irrigation was causing significant increases in diameter at 0.3 m and height of understory trees. A detailed stem analysis of 5 treated and 5 control white pine trees (Pinus strobus L.) from the mature overstory showed that upper stem diameter growth was increased significantly as a result of the irrigation. This stem volume response to waste water irrigation would not be detected had breast height diameter and total height been the only stem measurements taken. The irrigation is decreasing the biomass, the diversity, and the number of individuals of the ground vegetation.

Key Words: land treatment • biomass • stem analysis • Pinus strobus L.

NOTES

1 Contribution from the School of Forest Resources, Univ. of Georgia, Athens, GA 30602.

2 Associate Professor, School of Forest Resour., Univ. of Georgia, and Associate Professor, Dep. of Forestry, Iowa State Univ.; respectively.

Received for publication October 6, 1980.




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Copyright © 1981 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.