royal agricultural college rain harvesting on the farm tom overbury
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Royal Agricultural
College
Rain Harvesting on the Farm
Tom Overbury
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Royal Agricultural
College
Water supply to house put in in1935Some pipework replaced in 1980’sNo mains supply to farm buildings
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Royal Agricultural
College
Now being
replaced by
wind generator
and solar
panels
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Royal Agricultural
College
Water harvesting driven by need/meaness
Two set ups of two buildings each60 x 4-6 month calves in each building
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Royal Agricultural
College
First uses 3 open tanks
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Royal Agricultural
CollegeEach tank is 5.4 m3 (1,200 gallon)
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Royal Agricultural
College
Second set up uses glass fibre tank
Tank capacity 28 m3 28,000 litres (6,000 gallons)
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Royal Agricultural
College
Water collection
Localised flooding
Upkeep of guttering important
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Royal Agricultural
College
Water quality
Can be stagnant water problems
Leaves, debris, dead partridges
Clean out prior to use
Guaranteed
to stop it
raining
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Royal Agricultural
College
Over two buildings, 12.5 mm (½ in) of rain yields 6.3 m3 of water
(60 x 40 ft and 80 x 40 ft)
(18 x 12 m and 24 x 12 m)
Average winter monthly rainfall is say 80mm
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Royal Agricultural
College
Potential savings
Average monthly winter rainfallNov-Jan 90mm per monthFeb-Mar 80 mm per monthApril 70 mm
Over two buildings, 80mm gives 40m3
Less 15% for evaporation gives 34m3
At cost of £1.13 / m3 = £38.40
N.B. Not all winter water is used
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Royal Agricultural
College
Potential savings
Say use 15 litres per calf per day
120 calves use 54 m3 per month
At cost of £1.13 / m3 = £61.00 per month
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Royal Agricultural
College
Once you have routed all the run off to one place, it is crucial to allow for the excess once the tanks are full.
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Royal Agricultural
College
MDC Effective use of Water on Dairy Farms• http://www.dairyco.org.uk/media/10351/effectiveuseofwaterondairyfarms.pdf
Useful information: