Sustainable drainage systems technical guide
36Pages

Plumbing & Drainage Solutions

sustainable drainage systems geocellular unit is the result of extensive research and testing This improved product forms part of the range of Marley sustainable drainage systems, which also includes the Flowloc vortex controller. Plumbing & Drainage Solutions

have necessitated dealt with. Sustainable drainage systems (SUDS) provide an effective way of mimicking natural drainage before development takes place; whether to counteract the effect of overloading gravity pipelines and watercourses, which can contribute to flooding downstream; or conversely, dealing with rainwater run off on site to replenish ground water levels, particularly in times of water forefront of environmental policy marley.co.uk Technical hotline: 01622 852695

sustainable drainage systems ground SUDS solutions: ■ No health and safety risk ■ Adaptability to suit site conditions Compared with the more traditional metl storage, such as concrete rings or large d some distinct advantages. ■ Geocellular units are exceptionally easy to handle on site, allowing rapid construction of the tank ■ The modular format allows flexibility in the design of the tank plan area or depth to suit available space and ground water levels. nods of creating underground stormwater iameter pipe sections, modular cells offer ■ A square or rectangular tank amount of excavated...

Key components The Marley Waterloc250 cell is ideal for use in either an underground infiltration or attenuation system. 96% of the cell volume is available to store water, minimising the extent of excavation required for the installation. In addition, the innovative design of Waterloc250 enables the cells to be quickly built into layers and configured to suit the area available. Waterloc250 benefits ‧‧ ‧‧ ‧‧ Unique nesting ability of cells reduces storage on site and WLRE250 110mm/160mm inlet/outlet connector (inlet configuration) WLRC250 top layer cell connector Cell lifting bars WLRB250...

sustainable drainage systems Unit dimensions Length: 1200mm. Width: 800mm. Height 290mm* Void ratio Storage volume Storage capacity * Effective depth when installed in multiple layers: 260mm Vertical loading Lateral loading Short term characteristic compressive strength Short term load to transportation - saving Waterloc250 has lifting bars and an arrow moulded into the top face. The cells are assembled by rotating them by 180° from the nested stack. The cell connector actually consists of two clips; the 'pop-out' clip in the centre is the base cell clip, for securing the base layer, the...

Key components flowloc Flowloc is a Vortex flow control unit, which is used as part of an attenuation scheme. Flowloc controls the rate at which water is discharged to a surface water drain or Heavy duty aluminium flow tank. Available to accommodate flow rates ranging from 2 l/s to 15 l/s, Flowloc is controller and coupling system, installed in a chamber base with a withdrawal handle to allow easy access from the electro coated for long service life. surface for maintenance. In the unlikely event of blockage, an overflow pipe allows Available to suit a wide range of water to bypass the...

sustainable drainage systems Inlet/inspection chamber The Marley inlet chamber provides access to the soakaway or attenuation scheme for inspection and cleaning. A column of cells is omitted beneath the chamber to provide an inspection well. The chamber is seated into an adaptor tray (ordered separately). It can also be used as an inlet connection or connection for an air vent. For larger installations, multiple inlet chambers can be used, but must be bounded on Silt traps with or without additional filters. It is recommended that all stormwater drainage systems that discharge into...

Over recent years a guidance documents have been published, Added to this, regulatory guidance is also evolving. Planning Policy Communities and Local Government Development and flood risk sets out the Government's policy on different aspects of land use planning in England. With respect to SUDS, the policy document states that "Regional planning bodies and local authorities should promote the use of SUDS for the management of run-off Local planning authorities should ensure that their policies and decisions on applications support and complement Building Regulations." Communities and Local...

sustainable drainage systems CIRIA publications This guidance provides best practice advice on the planning, design, construction, operation and maintenance of Sustainable Drainage Systems (SUDS) to facilitate their effective implementation within Sustainable drainage systems - Hydraulic, structural and water quality advice 2004. CIRIA C609 A report which details the successful design and construction of Sustainable Drainage Systems. Structural design of modular geocellular drainage tanks 2008. Co-sponsored by Marley, this report focuses specifically on the different types of underground...

Infiltration systems are designed to provide temporary storage of surface water run off while natural dispersion into the surrounding soil takes place. Conventional soakaways are the most common example of below ground infiltration. The high void area of Waterloc250 (96%) means that a third of the volume is required compared with a conventional gravel/shingle filled soakaway. The success of any infiltration installation is wholly dependent on the permeability of the surrounding soil. Waterloc250 cells require a geotextile wrapping in accordance with the specification in appendix one, (page...

sustainable drainage systems Designed to store stormwater temporarily in a suitable chamber below ground and release it at a pre-determined rate via a vortex flow control unit, such as the Marley Flowloc or an orifice plate. This limits the peak flow of water, thereby reducing the likelihood of overloading pipelines or watercourses downstream. The sizing of the attenuation tank is critical, to allow sufficient capacity to prevent upstream flooding. The Marley Technical Services team offer a design service to assist with this calculation. Attenuation tanks must be encapsulated within an...