Posted on March 4, 2013 by Naomi Finseth

Attend Dr. David L. Rudolph’s 2013 Darcy Lecture presentation and gain insight on how the nature of groundwater quality has been impacted from agricultural land-use practices, at both local and regional scales, with a specific focus on nitrate and microbial indicator species.

2013 Henry Darcy Distinguished Lecture

Managing Groundwater Beneath the Agricultural Landscape

Dr. David Rudolph
University of Waterloo

Monday, March 4, 2013
4:00 p.m.

3-36 Tory Building
University of Alberta

 

Attend Dr. David L. Rudolph’s 2013 Darcy Lecture presentation and gain insight on how the nature of groundwater quality has been impacted from agricultural land-use practices, at both local and regional scales, with a specific focus on nitrate and microbial indicator species.

Agricultural land use represents the largest nonpoint source threat to groundwater quality on a global scale. As a result of decades of fertilizer application and surface spreading of animal manure, chronic increases in nutrient concentrations have been documented in both private and municipal well systems. The occurrence of pathogenic microbes in groundwater supply wells has also been associated with agricultural practices at the land surface. Beneficial management practices (BMPs) designed to reduce the risk of groundwater quality impacts in agricultural environments are being implemented worldwide, yet very little data are available to assess the performance of these BMPs.

The complexities associated with variable mass loading to the water table will be explored, considering regional recharge distributions. The role of the vadose zone in controlling subsurface redistribution, and as an archive of past land-use activities, will also be considered relative to the legacy of agricultural impacts on groundwater quality. The performance of a regional-scale BMP program designed to reduce nutrient loading to the subsurface in the vicinity of an impacted municipal groundwater supply system will be evaluated based on more than a decade of field monitoring evidence. The utility of a targeted in situ denitrification approach designed as a remedial strategy to temporarily augment the BMP program in the vicinity of the municipal wells will be addressed based on the results of field experiments.

Finally, the potential influence of extreme climatic variability on the mobility of nutrients and microbial species in agricultural environments will be explored relative to aquifer and well vulnerability.

Admission is free and pre-registration is not required.  The Henry Darcy Lecture Series is sponsored by the National Ground Water Association (www.ngwa.org), with local support from the Hydrogeology Group at the University of Alberta and the Edmonton Chapter of the IAH.  Please contact Dr. Carl Mendoza (Carl.Mendoza@UAlberta.ca) for further information.

Parking in lot E, just northwest of Tory and north of ESB, and on Saskatchewan Drive is worth a try, but may be at a premium and expensive. Parking in lot U/N, just east of HUB at 90 Ave and 111 St, is a good alternative.


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