54
groundworks Infiltration
RWH system placed low enough to collect surplus stormwater
case of a direct RWH system), or to a header tank (in the case of an indirect RWH system).
Large-scale attenuation
For large-scale projects, such as housing developments or commercial premises, tanks can be designed from modular cells (such as Graf UK’s EcoBloc systems), covered in an LLDPE-welded geomembrane. This prevents any water from escaping from the system unchecked. The outflow rate is regu- lated to allow the water above the outlet to be discharged into the sewage system in a controlled manner, while the water below the outlet, at the bottom of the tank, is retained for reuse.
In parts of the country which have the right type of soil (i.e. not clay or rock-based), stormwater infiltration can be effectively incorporated into a RWH system. This is done by adding a crate-style soakaway or a tunnel system (pictured), which is sized according to the infiltration rate of the soil. This method is suitable for both domestic and commercial applications. A range of RIBA-approved CPDs on the design and opera-
tion of RWH and stormwater management systems are avail- able. These cover in great detail a variety of topics including legislation, sizing and combining RWH systems with stormwater solutions – and are a useful resource for further learning.
Harvesting the benefits
The case for combining RWH with SuDS to safeguard against unpredictable weather conditions – all while meeting official flood prevention criteria in the process – has never been stronger. Architects and specifiers who want to offer their customers holistic, future-proof water management solutions should equip themselves with a good knowledge of the products on offer today, to be in the best position to reap the rewards for years to come.
enq.156
Think Rainwater Harvesting Think ENDURATANK
Did you know?
The average roof collects about 85,000 litres of rain a year.
Water is precious. Save it.
From homes and gardens to large industrial sites, our rainwater harvesting systems can be tailored to meet any requirement.
01778 338240
www.enduratank.co.uk
enq.157
www.architectsdatafile.co.uk enq.158
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84