Hydro International has published a guide to vortex flow controls in surface water management and sustainable drainage systems (SUDs).<br> <br> Available to download, the guide demonstrates to specifiers, installers and developers the choices of flow control available. It provides advice on successful specification and explores the consequences of selection choices on development costs.<br> <br> The HX Guide to Vortex Flow Controls offers advice to anyone involved in drainage design or installation, including consulting engineers, architects, contractors and housebuilders. It outlines how flow control design choices can impact on effective flood prevention, as well as on land use and construction costs.<br> <br> Since Hydro International developed its vortex technology, the Hydro-Brake Flow Control has become an industry-standard method of flow attenuation and a means of creating and controlling stormwater storage and release, the company claims.<br> <br> "Vortex technology offers a sustainable solution for managing surface water flood risk on projects of all shapes and sizes – from giant flood prevention schemes protecting cities, to everyday small-catchment drainage schemes," says Alex Stephenson, director of Hydro International's UK stormwater division.<br> <br> www.hydro-int.com