Beaver dams along an agricultural stream in southern Ontario, Canada: their impact on riparian zone hydrology and nitrogen chemistry

2009 ◽  
Vol 23 (9) ◽  
pp. 1324-1336 ◽  
Author(s):  
Alan R. Hill ◽  
Tim P. Duval
Keyword(s):  
Riparian Zone ◽  
Southern Ontario ◽  
Agricultural Stream ◽  
Beaver Dams

Channel Aggradation by Beaver Dams on a Small Agricultural Stream in Eastern Nebraska

2013 ◽  
Author(s):  
M. C. McCullough ◽  
J. L. Harper ◽  
D.E. Eisenhauer ◽  
M. G. Dosskey
Keyword(s):  
Agricultural Stream ◽  
Channel Aggradation ◽  
Beaver Dams

scholarly journals Coherence among Different Microbial Source Tracking Markers in a Small Agricultural Stream with or without Livestock Exclusion Practices

2013 ◽  
Vol 79 (20) ◽  
pp. 6207-6219 ◽  
Author(s):  
Graham Wilkes ◽  
Julie Brassard ◽  
Thomas A. Edge ◽  
Victor Gannon ◽  
Cassandra C. Jokinen ◽  
...  
Keyword(s):  
Stream Flow ◽  
Riparian Zone ◽  
Management Practice ◽  
Microbial Source Tracking ◽  
Source Tracking ◽  
Content Type ◽  
Discrete Sample ◽  
Agricultural Stream ◽  
Parasitic Pathogens ◽  
Human Viruses

ABSTRACTOver 1,400 water samples were collected biweekly over 6 years from an intermittent stream protected and unprotected from pasturing cattle. The samples were monitored for host-specificBacteroidalesmarkers,Cryptosporidiumspecies/genotypes, viruses and coliphages associated with humans or animals, and bacterial zoonotic pathogens. RuminantBacteroidalesmarkers did not increase within the restricted cattle access reach of the stream, whereas the ruminantBacteroidalesmarker increased significantly in the unrestricted cattle access reach. HumanBacteroidalesmarkers significantly increased downstream of homes where septic issues were documented. WildlifeBacteroidalesmarkers were detected downstream of the cattle exclusion practice where stream and riparian habitat was protected, but detections decreased after the unrestricted pasture, where the stream and riparian zone was unprotected from livestock. Detection of a large number of human viruses was shown to increase downstream of homes, and similar trends were observed for the humanBacteroidalesmarker. There was considerable interplay among biomarkers with stream flow, season, and the cattle exclusion practices. There were no to very weak associations withBacteroidalesmarkers and bacterial, viral, and parasitic pathogens. Overall, discrete sample-by-sample coherence among the different microbial source tracking markers that expressed a similar microbial source was minimal, but spatial trends were physically meaningful in terms of land use (e.g., beneficial management practice) effects on sources of fecal pollution.

Buffer Strips for Riparian Zone Management

1991 ◽  
Author(s):  
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
Keyword(s):  
Riparian Zone ◽  
Buffer Strips ◽  
Zone Management ◽  
Riparian Zone Management

The Numerical Analysis of Contaminant Migration from Sanitary Landfill Sites

1977 ◽  
Vol 12 (1) ◽  
pp. 233-255
Author(s):  
J.F. Sykes ◽  
A.J. Crutcher
Keyword(s):  
Contaminant Transport ◽  
Cross Section ◽  
Element Model ◽  
Sanitary Landfill ◽  
Saturated Porous Media ◽  
Two Dimensional ◽  
Contaminant Migration ◽  
Southern Ontario ◽  
Galerkin Finite Element ◽  
Chloride Concentrations

Abstract A two-dimensional Galerkin finite element model for flow and contaminant transport in variably saturated porous media is used to analyze the transport of chlorides from a sanitary landfill located in Southern Ontario. A representative cross-section is selected for the analysis. Predicted chloride concentrations are presented for the cross section at various horizon years.

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