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Articles

THE EVOLUTION OF STORMWATER MANAGEMENT IN THE GRAND RIVER WATERSHED

Pages 249-258 | Published online: 23 Jan 2013
 

Abstract

In the last two and a half decades, stormwater management (SWM) techniques used in the Grand River Basin have become more sophisticated. While the use of conventional systems, swales and existing watercourses, has remained fairly consistent, a number of innovative techniques have emerged since 1985. In the early 1990s water managers began using a greater range of available SWM techniques. In addition, special SWM measures were put in place to maintain the integrity of Environmentally Sensitive Areas (ESA). Two important factors impeding the implementation of SWM techniques were a lack of guidelines and conflicting requirements and practices of the different regulatory agencies. Significant uncertainty exists among municipalities and consultants as to which organization constitutes the lead agency to review SWM plans. Two major deficiencies noted in SWM plans were a lack of maintenance agreements and formal monitoring programs.

Les techniques de gestion des eaux pluviales utilisées dans le bassin de la rivière Grand sont de plus en plus sophistiquées, bien que l’emploi des systèmes conventionnels de ’swales’ et de cours d’eau existants sont plutôt constants, maintes techniques innovatrices ont fait surface depuis 1985. Au début des années 1990, la gestion des eaux pluviales cherchait à combiner une plus grande variété de techniques disponsibles. De plus, des démarches ont été instaurées afin de maintenir l’intégrité dans un milieu écologique fragile. L’absence de directives et les opinion incompatibles entre les différents niveaux de réglementation ont contribués à freiner la mise en jeu des techniques de gestion des eaux pluviales. De l’incertitude existe entre les municipalités et les consultants en ce qui concerne l’organisme qui sera responsable pour la révision des plans de gestion des eaux pluviales. Deux lacunes du programme se situent au niveau d’une absence d’un système de maintien et d’une absence d’un système d’évaluation.

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