ABSTRACT
ABSTRACT: On-site stormwater management, or sustainable drainage systems (SUDS) have been conceived to satisfy the ecologic, social and economic aspects of sustainability. In certain European countries SUDS are supported by institutional arrangements, covering aspects of runoff attenuation, quality improvement, infiltration, and detention. It is being shown that SUDS often only control the volumes and peaks of minor storms and only reduce flood risk to a limited extent. This situation can be improved if SUDS include conveyance systems for the routing of drainage that exceeds the capacity of measures traditionally considered to be part of the “treatment train”. It is recommended to expand the concept of SUDS to make them “Sustainable Drainage and Conveyance Systems” (SUDACS) to fully include routing of exceedance flows. With such an expansion SUDS could more adequately address the needs of floodmanagement in Europe, which needs to cover the prevention, protection, preparedness, emergency response and recovery from floods.
