Combined Harvesters 2009 Brochure
Welcome to Combined Harvesters storm water management / SUDS section. Information on storm water attenuation and infiltration is provided below and in our brochure above. Some of the storm water management products we stock are: hydro valve, graf rain block, storm box, wavin aqua cell, metro cell, waterloc, marley, wavin and accessories suitable for your storm water system; silt traps, geo textile membranes, roden barrier, geo joining tape, adaptors, perforated pipe, non return valves, sampling chambers and much more. Call for details 0151-334-8655.
Sustainable drainage systems
The philosophy of sustainable drainage systems or SUDS is to mimic as closely
as possible the natural drainage from a site before development, and to treat
run-off to remove pollutants.
A sustainable drainage system provides several benefits over conventional
systems. Correctly designed, installed and maintained, SUDS can improve the
management of surface water run-off for most developments.
• Reducing peak flows to watercourse and sewers, reducing flood risk downstream.
• Improving water quality by reducing the levels of silts and pollutants.
• Reducing potable water demand through rainwater harvesting.
• Replicating natural drainage patterns, including the recharge of groundwater.
Infiltration
Infiltration systems store water temporarily. With the potential to provide
a cost effective solution to many site drainage problems, they are generally
divided in to two categories depending upon whether temporary storage of water
takes place above or below ground level.
Above ground infiltration systems utilise natural or artificial surfaces.
Their shape and size may vary considerable from near level surfaces to basins
and swales that have distinct sloping sides. Typical examples include porous
pavements and paviours basins and swales.
Below ground or sub-surface infiltration systems offer temporary storage of
surface water below ground level. Conventional soakaways are the most common
example, although alternative options include the use of trench style soakaways
and infiltration blankets that utilise pipe work over a large plan area for
dispersal.
Attenuation
In principal this consists of the temporary storage of surface water in a suitable chamber below ground level. This chamber needs to be of sufficient size to accommodate the calculated run off during peak periods of rainfall. The stored water is then gradually released in a controlled manner into a surface water or combined drainage system, or watercourse, subsequently eliminating the risk of flooding.
Traditional methods of attenuating flows include the use of tanks and oversized pipes to create the storage chamber with outlets being controlled by downstream throttles, orifice plates, hydraulic controls or valves.
Increasingly, as existing sewer networks approach their capacity, attenuation systems offer a cost effective solution for accommodating additional catchments without increasing the size of existing sewers.
It is now commonplace on brownfield developments for sewerage undertakers to limit additional flow into existing sewers to a level equivalent to that of the original run-off. In these situations an attenuation device will be required.
• Infiltration and attenuation reduce the quantity of water requiring conveyance in any piped system downstream of the development and decrease the flow in stormwater sewers the risks of discharge from overflows in combined sewer systems.
• Infiltration may be used where there is no convenient existing storm drainage system to which connection can be made.
• By controlling stormwater close to source, infiltration and attenuation drainage reduces the hydrological impact of urbanisation.
• Infiltration and attenuation may be used where existing piped systems or treatment works are near or at capacity loading.
• Infiltration can be used to enhance recharge to groundwater in situations where the quality of stormwater runoff does not pose a threat to groundwater quality.
• Construction is normally simple and rapid.
• Whole-life costs may be less than for alternative systems
It should be also noted that;
• The performance of infiltration systems depends on the properties of the soil in which they are constructed
• Field tests are necessary in order to determine infiltration coefficients for design purposes.
• Water table must be known.
Rain Water Harvesting Above Ground, Rain Water Harvesting Below Ground, Storm Water Management SUDS, RainCatcher, Commercial Systems, Waste Water Tanks Filters and Diverters, Water Pumps Hoses and Fittings, Water Butts, Grey Water Systems, Garden Irrigation, General Accessories, Geo Textile Membranes, Drains, Covers and Pipes, Fuel Storage Tanks, Green Roof, Spray Guard.
Our product range comes from suppliers in the uk, germany and the rest of the world, locally / UK sourced whereever possible. Our range of products and systems are explained deeper in their relative pages as listed below-:
Rain Water Tanks : above ground rain storage tanks, below ground storage tanks, garden tanks, above ground full rainwater harvesting systems.
Water Butts. : from manufacturers such as rainsaver, rain catcher, cloudburst, oak barrels, raincatcher, garden lake, garden river, gardena.
Rain Filters and Diverters : rainsaver diverter, sankey diverter, raincatcher diverter, optimax filter, patronen filter, minimax filter, universal 3 filter and filter packages.
Storm Attenuation / SUDS : storm crates, waterloc, marley, wavin plastics, geotextile membranes, visquene membranes.
Pump Packages : eco plus, home pro, graf, 3p technic, karcher, ebara, gardena, presscomfort.
Hose pipes : hozelock, gardena, kingfisher, hose pipes, leaky pipe, pourus pipe, compression fittings, connectors, connections for any pump made up tp suit your requirments
Garden Irrigation / Watering : irrigation systems, sprinklers, leaky pipe, gardena pipe, drip pipe, timers, water controls.
Spray Guard Tank Cleaner : sprayguard is a stable aqueous solution used to treat surfaces/materials in order to provide a durable microbiostatic finish
Rain Catcher Flush for Free Tank : raincatcher 700 litre tank with fully automatic controls to flush your toilets, run your washing machine, run a garden tap... etc.
AquaGrey - Grey Water Filter : aquagrey water filter to filter your bath / shower water into any tank ready for use in the home / garden.
Geo Textile Membranes : weedex, g90, g1000, g2000, g3000, japenese knotweed, envirotrak, hypex, landscape, garden, pavetex, ponderlay, butyl rubber, pinnacle, joining tape.
Recessed Man Hole Covers : full range of recessed man hole covers available in almost any size.
Silt Traps and Backflow Protection : we also offer various silt traps and back flow protection products. silt traps can be made to suit your requirements so please ask us for a price
Grey Water Systems : grey water systems from a simple water butt with attached grey water filter to a system that collects rain & grey water and uses that water to flush toilets / run washing machine and outside tap.
If you dont find what you need here please click the link below to access our 2009 Brochure or give us a call on 0151-334-8655 for more information.
Combined Harvesters 2009 Brochure
© Combined Harvesters Ltd UK 2008.