The need to discharge surface storm water run-off is not a new idea for the Engineer or Architect. The devastation which can be caused by ignoring the forces of "Mother Nature" is known to all. Flooding is a major problem around the world, whether from the change in climatic conditions or the under resourced drainage network. Closer to our own work, how often do we hear clients saying "We cannot afford such a system"; we must all respond as professionals "You cannot afford NOT to!"
Storm water does not only need to be discharged, but it needs to be managed. Both the quantity and quality should be controlled within the site, with full respect to the surrounding land drainage. Our discharge should not unbalance the wider integrated river catchment.
It has been concluded that surface storm water systems must satisfy three criteria:-
- Function - it must discharge the calculated run-off - it must withstand the imposed traffic loads - it must include suitable elements for the control of flow rate and pollution.
- Legality - it must be designed to comply with all the relevant design codes and Government acts.
- Quality - it must be durable, with low maintenance cost - it should be flexible for change in use - it must look right.
This symposium paper (152 Kb PDF) aims to address the above topics with reference to current practice and product innovation.