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Web URL(s): | http://www.jswconline.org/content/55/2/212.full.pdf+html Last checked: 10/01/2008 Requires: PDF Reader Access conditions: Item is within a limited-access website http://www.jswconline.org/content/55/2/212.full.pdf Last checked: 08/13/2013 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Professional |
Author(s): | Lowrance, R.;
Hubbard, R. K.;
Williams, R. G. |
Author Affiliation: | Southeast Watershed Research laboratory, USDA-ARS, Tifton, Georgia |
Title: | Effects of a managed three zone riparian buffer system on shallow groundwater quality in the southeastern Coastal Plain |
Section: | Research Other records with the "Research" Section
|
Source: | Journal of Soil and Water Conservation. Vol. 55, No. 2, Second quarter 2000, p. 212-220. |
Publishing Information: | Ankeny, IA: Soil and Water Conservation Society |
# of Pages: | 9 |
Related Web URL: | http://www.jswconline.org/content/55/2/212.abstract Last checked: 08/13/2013 Notes: Abstract only |
Keywords: | TIC Keywords: Buffer zones; Riparian zones; Groundwater contamination; Water quality; Precipitation; Chlorine; Nitrates; Seasonal variation; Comparisons; Topography; Trees; Water table; Harvesting
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Abstract/Contents: | "Riparian forest buffers can help improve agricultural water quality. USDA guildelines are for riparian forest buffers of three zones. Zone 1 is permanent woody vegetation near the stream. Trees can be harvested in Zone 2, which is upslope from Zone 1. Zone 3 is a grass filter upslope from Zone 2 at field edge. In order to test USDA guidelines, a site was established in the southeastern Coastal Plain near Tifton, Georgia, with an 8 m wide grass buffer (Zone 3) situated between a field and a mature Riparian forest. In the Zone 2 forest, mostly 50 year-old pine trees, one block was harvested by clearcut, one block was thinned, and one block was left as a mature forest control. Care was taken to minimize soil disturbance during the timber harvest operation. The Zone 1 forest [15 m wide (49 ft)] was left undisturbed. Shallow groundwater wells were used to monitor the effects of the managed Riparian forest buffer on N, P, and Cl concentrations. Groundwater nitrate concentrations decreased from 11 to 22 mg Lā»Ā¹ adjacent to the field to less than 2 mg Lā»Ā¹ at 5 m (16 ft) into the forest. Nitrate concentration decreased under the grass filter strip as well as in the forest. Nitrate concentrations increased in one corner of the Riparian forest near the stream. This increase may be due to flow patterns of groundwater that bypasses the Riparian forest buffer. Chloride concentrations increased under the buffer indicating that the nitrate removal was due to biological processes such as plant uptake and denitrification rather than dilution. Concentrations of other potential pollutants such as ortho-p, ammonium, and organic N moved in very small quantities and did not show consistent spatial patterns. There was no effect due to harvesting of the Zone 2 forest on either nutrient concentrations or water table elevations. These results indicate that Zone 2 trees, along small streams in the southeastern coastal plain, can be harvested with little effect on groundwater nutrient movement to streams." |
Language: | English |
References: | 11 |
See Also: | Other items relating to: Buffer Zones |
Note: | Figures Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Lowrance, R., R. K. Hubbard, and R. G. Williams. 2000. Effects of a managed three zone riparian buffer system on shallow groundwater quality in the southeastern Coastal Plain. J. Soil Water Conserv. 55(2):p. 212-220. |
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| Web URL(s): http://www.jswconline.org/content/55/2/212.full.pdf+html Last checked: 10/01/2008 Requires: PDF Reader Access conditions: Item is within a limited-access website http://www.jswconline.org/content/55/2/212.full.pdf Last checked: 08/13/2013 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: S 622 .J65 |
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