The Influence of Vegetation in Riparian Filterstrips on Coliform Bacteria: I. Movement and Survival in Water

Abstract

and with fecal coliform bacteria in 1.5 (r2 = 0.82) and 2.0 m (r 2 = 0.76) wells. Animal production operations may need to locate in warm-dry climates so animal waste can be applied to lands to help ensure enteric bacteria input to surface and ground water will not occur.

The Influence of Vegetation in Riparian Filterstrips on Coliform Bacteria: II. Survival in Soils

“…l and 2; Entry et al, 2000). Vegetative treatments were ( i 20 m grass buffer draining into 10 m existing forest riparian /one vegetation, (ii) 10 m grass buffer draining into 20 m existing forest riparian zone vegetation, and (iii) 10 m grass huller draining into 20 m maidencane.…”

“…The overland flow-riparian buffer plots were each 4 m wide and 30 m long. and were positioned on the landscape according to contour, so that flow of the wastewater downslope would be as uniform as possible (Entry et al, 2000). The sides of each plot were bounded with plastic borders that extended 15 cm above ground and 15 cm below ground.…”

“…At the top of each plot a gated pipe made of plastic was used to apply wastewater. The individual plots were positioned on the landscape to minimize cross-contamination of the shallow ground water and vegetative treatments (Entry et al, 2000). Wastewater flowed from an individual tank above each plot into the gated pipe and then downslope.…”

“…The potential for movement of pathogenic bacteria in surface runoff and ground water will in part depend on soil type, climatic and soil conditions, method and amount of manure disposal, and the amount and type of vegetation growing on the site (Entry et al, 2000;Howell et al, 1996;Maswdsley et al, 1995;Canale et al, 1993;Van Donsel et al, 1967). The companion study (Entry et al, 2000) found that land application of swine waste to riparian vegetation increased total and fecal coliform concentrations in soil water and shallow ground water from 10-to 1000-fold. Time and expense in testing for microorganisms pathogenic to humans have led to the use of indicator bacteria of enteric origin to estimate die-off of pathogens in soil and water.…”

Monitoring Recreational Waters: How to Integrate Environmental Determinants

“…The impact of animals at pasture could also be associated with their distribution across the watershed and if they have access to a watercourse [54]. crobes coming from agricultural lands and entering surface waters by more than 90% by preventing soil erosion and contributing to absorption of runoff water [55][56][57]. However, no scientific consensus exists on the minimal required width for an efficient reduction of microorganism transfer, although it is known that recommended width is affected by ground slope and vegetation type [58].…”