Chokri Dridi
University of Alberta
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Publication
Featured researches published by Chokri Dridi.
Canadian Water Resources Journal | 2010
Amy E. Mannix; Chokri Dridi; Wiktor L. Adamowicz
Water extraction from the Athabasca River for oil production has generated significant public concern due to its potential environmental impacts. Phase 1 of the Lower Athabasca Water Management Framework, introduced in February 2007, limits industrial water extractions in the Oil Sands based on available data on in-stream flow needs. The framework designates green, yellow, and red flow conditions on a weekly basis for the setting of progressive water restrictions. Using various streamflow and water demand scenarios, the frequency of each flow condition is investigated along with cases of when water-use restrictions may occur. Using a base case flow scenario (10% reduction in historic flows) and a high-growth forecast of demand of 14.0 m3/s by 2025 (equivalent to full utilisation of current approved licences) it is estimated that binding flow conditions of the Phase 1 framework would occur for an average of six weeks per year during winter, with significant variance across years. To avoid restrictions, demands would need to be limited to 7.5 m3/s (i.e., average water use of 0.2 m3 per barrel of crude oil produced by 2020), or storage would be required of a capacity in the order of 15% of the annual supply to industry. An ecosystem base flow, if adopted for Phase 2 of the framework, may significantly increase the severity of restrictions (assuming an in-stream flow threshold of 100 m3/s based on the minimum weekly Q95). The results highlight the need for a long-term, cost-effective strategy to manage the implementation of water restrictions in the Oil Sands, and the problematic nature of assigning fixed licensed volumes - rather than proportional shares - in a variable streamflow environment.
Journal of Toxicology and Environmental Health | 2011
Milap Petigara; Chokri Dridi; Jim Unterschultz
Input–output analysis was used to calculate the economic impacts from potential prion diseases outbreaks in Alberta and the rest of Canada. Both chronic wasting disease (CWD) and bovine spongiform encephalopathy (BSE) have the capacity not only to affect the farmed cervid and cattle industries, but also to impact all industries with direct and indirect links to these sectors. Cervid sector shocks yield small spillover effects on the economies of Alberta as well as that of all of Canada. In contrast, the cattle sector generates larger multiplier effects in both specifically Alberta region and all of Canada. The industries that consistently experience the largest impacts from prion disease outbreaks in both Alberta and remainder of Canada economic regions are agricultural sectors, mining and energy sectors, and industries dedicated to trade, transportation, and warehousing.
Project Report Series | 2010
Wiktor L. Adamowicz; Chris Arnot; Peter C. Boxall; Chokri Dridi; Ellen Goddard; M. Jordan; Keldi Forbes; K. Laate; K. Myshaniuk; Brenda Parlee; M. Petigara; James R. Unterschultz; Natalie Zimmer
This report summarizes a series of projects undertaken by staff and students in the Department of Rural Economy which examine various socio-economic aspects of chronic wasting disease and its effect on a range of stakeholders in Alberta. The four projects included exploring impacts on the cervid farming industry, hunters, the general Albertan public, and certain Aboriginal groups. General results from these studies are presented with references that provide a more thorough analysis and discussion.
Canadian Water Resources Journal / Revue canadienne des ressources hydriques | 2014
Amy E. Mannix; Wiktor L. Adamowicz; Chokri Dridi
Limits on water diversions from the Athabasca River may affect the growing oil sands industry in the medium term. For new entrants, the costs of future water restrictions may be high due to the combination of a strict water conservation regulation, a profitable oil sector that relies on fresh water, and water allocation in order of licence seniority. Though river flows would, for the most part, be preserved and well within 90% of the flows recorded upstream of industry, the future value of water for oil production is estimated to be up to
MPRA Paper | 2005
Geoffrey J. D. Hewings; Chokri Dridi; Joaquim José Martins Guilhoto
80 per cubic metre in a single period (peak spot value, approx.), and
Canadian Journal of Agricultural Economics-revue Canadienne D Agroeconomie | 2010
Chokri Dridi; Wiktor L. Adamowicz; Alfons Weersink
72,000 per megalitre if drawn annually as an ongoing, continuous demand (average marginal value in present terms). These results are based on certain model assumptions, including flows that are 10% less than the historic record, a simplified depiction of the production costs and revenues of oil producers, and no access to technologies that may reduce the cost of water restrictions. Using a medium-term (~2020) static demand scenario, a policy and two technologies to reduce the costs of water restrictions are assessed. A combined policy-technology response was found to be the most cost effective. As various technologies that lower costs are already planned or in use, further consideration of an efficient water allocation policy, such as water charges, that may reduce costs by providing incentives for efficiency and technology investment across all firms – not just new entrants – is recommended. In general, the results of this study indicate the importance of designing regulations that encourage conservation goals to be achieved at least cost. Future studies may consider the water diversion limits in the Athabasca River, including whether the costs of conservation are commensurate with the economic value of in-stream flows.
Economics Bulletin | 2011
Chokri Dridi; Naceur Khraief
Archive | 2011
Chokri Dridi; Naceur Khraief
Archive | 2010
Maria Plotnikova; Chokri Dridi
Latin American Business Review | 2007
Kerlyng Cecchini; Joaquim José Martins Guilhoto; Geoffrey J. D. Hewings; Chokri Dridi