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Résumé :
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Cold climate affects urban drainage in many ways, including changes in the urban hydrological cycle, generation and transport of runoff and snowmelt and associated pollutants, operation of runoff and snowmelt management facilities and sewage treatment plants, and disposal of polluted snow, runoff and snowmelt. Reduced infiltration into frozen soils can significantly increase the area contributing runoff. Stormwater drainage and management systems may be overloaded during winter or early spring, often as rain-on-snow events coincide with snowmelt and cause flooding. Conventional management practices, such as stormwater ponds and wetlands, hit new problems in frozen conditions: e.g., flow patterns may be forced either under or over the ice cover, respectively resulting in scouring of bottom sediment or shallow flows over the ice cover with poor pollutant settling. De-icing and anti-skid treatments can also create pollution problems of their own. From the 31 presentations at a well attended conference 17 articles have been peer-reviewed and selected for publication in these proceedings. Keynote papers address the interaction of urban drainage and water quality in cold weather and best management practices. Other papers focus on: road salt and de-icers; snow quality and management; and urban hydrology. These papers constitute a thorough state-of-the-art survey of urban drainage in cold climates, and this book will prove an excellent source of information and insight for engineers, scientists, and managers from research organisations and local and governmental authorities involved in this field.
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