Drinking our Rivers Dry? How behaviour change can help save How behaviour change can help save the Kennet............... www.ech 2 o.co.uk
Water use needs to be reduced • Swindon, where the McRobie family live, is in the South of England and is classified by the Environment Agency as under severe water stress • It takes most of its water from a borehole that also feeds the x River Kennet, and the effect on the river downstream of the th i d t f th borehole is stark www.ech 2 o.co.uk
Logging the McRobie family’s water use • A data logger shows the amount of water that has passed through a meter over a 15 minute period • By analysing the raw data, overall daily consumption can be calculated • By comparing the data with the family’s movements a picture can be built up of where they are using the p p y g most water • The following slides are a snapshot of the data we g p collected and analysed www.ech 2 o.co.uk
The McRobie family’s usual water consumption consumption www.ech 2 o.co.uk
Average daily use = 443 litres 700 700 600 500 400 300 200 100 0 14/07/2011 15/07/2011 16/07/2011 17/07/2011 18/07/2011 www.ech 2 o.co.uk
Analysing the data - before • Data was analysed from five full days of use, Thursday July 14 th - Monday July 18 th • Average was 443 litres per day. The range was 253 – 608 litres a day • Marie is at home during the day so on some weekdays washing or cleaning is done during the day • It can be seen that showering and bathing is sometimes in the morning and sometimes in the evening, and the later start times on Sunday • The next four slides show water use at 15 minute intervals for Friday - Monday www.ech 2 o.co.uk
www.ech 2 o.co.uk Litre es used 10.0 20.0 30.0 40.0 50.0 60.0 0.0 00:00:00 00:45:00 01:30:00 02:15:00 03:00:00 03:45:00 04:30:00 05:15:00 06:00:00 Water Usage Fri 15th July 2011 Water Usage Fri 15th July 2011 06:45:00 07:30:00 08:15:00 09:00:00 09:45:00 10:30:00 11:15:00 Time Time 12:00:00 12:45:00 13:30:00 14:15:00 15:00:00 15:45:00 16:30:00 17:15:00 18:00:00 18:45:00 19:30:00 20:15:00 21:00:00 21:45:00 22:30:00 23:15:00
www.ech 2 o.co.uk Litres use ed 100.0 120 0 120.0 20.0 40.0 60.0 80.0 0.0 00:00 0:00 00:45 5:00 01:30 0:00 02:15 5:00 03:00 0:00 03:45 5:00 04:30 0:00 05:15 5:00 06:00 0:00 Water Usage Sat 16th July 2011 06:45 5:00 07:30 0:00 08:15 5:00 09:00 0:00 09:45 5:00 10:30 0:00 11:15 5:00 Time 12:00 0:00 12:45 5:00 13:30 0:00 14:15 5:00 15:00 0:00 15:45 5:00 16:30 0:00 17:15 5:00 18:00 0:00 18:45 5:00 19:30 0:00 20:15 5:00 21:00 0:00 21:45 5:00 22:30 0:00 23:15 5:00
Water Usage Sun 17th July 2011 80 0 80.0 70.0 60.0 d Litres used 50.0 50 0 40.0 30.0 20 0 20.0 10.0 0.0 Time www.ech 2 o.co.uk
Water Usage Monday 18th July 2011 60 50 40 tres used 30 Lit 20 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 : : : : : : : : : : : : : : : : : : : : : : : : 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 : : : : : : : : : : : : : : : : : : : : : : : : 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 Time www.ech 2 o.co.uk
The leak................ • As we analysed the data we could see unexplained A l d th d t ld l i d use happening during the night. This can be seen on the graphs as about 1 litre of use every 30 minutes the graphs as about 1 litre of use every 30 minutes • We assumed it was a dripping tap or WC overflow, until we were rang on Tuesday morning to hear the hose e ere rang on T esda morning to hear the hose had been running “all night”. It was the hose trigger letting by until it was finally pushed right off! letting by until it was finally pushed right off! • Actually it was only from about 5 am but the effect on the graph is dramatic the graph is dramatic............... • As is the fact that the family felt so bad about it they virtually didn’t use any more water the rest of the day! virtually didn t use any more water the rest of the day! www.ech 2 o.co.uk
Water Usage Tues 19th July 2011 450 400 350 300 tres used 250 200 Lit 150 100 50 50 0 Time www.ech 2 o.co.uk
Running hose in 1.75 hours wasted 2484 litres, 5.6 days average water use! 3000 3000 2500 2000 1500 1000 500 0 0 14/07/2011 15/07/2011 16/07/2011 17/07/2011 18/07/2011 19/07/2011 www.ech 2 o.co.uk
The Mcrobie family's water consumption after understanding where and how they use water and how where and how they use water and how best to reduce their use www.ech 2 o.co.uk
New average daily use = 227 litres - a 49% reduction! % 350 300 250 200 150 100 50 50 0 21/07/2011 22/07/2011 23/07/2011 24/07/2011 25/07/2011 www.ech 2 o.co.uk
Analysing the data - after • Data was analysed from five full days of use, Thursday July 21 st - Monday July 25 th • Average was 227 litres per day. The range was 125 – 313 litres a day • Water usage is still spread across the day but with less used in the morning and evening times showing the reduction in shower times and bath depths • The next five slides show water use at 15 minute intervals for Thursday - Monday www.ech 2 o.co.uk
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www.ech 2 o.co.uk Litres used d 10 20 20 30 40 50 60 70 0 0 00:00:00 00:45:00 01:30:00 02:15:00 03:00:00 03:45:00 04:30:00 05:15:00 06:00:00 06:45:00 07:30:00 Water Usage Sun 24th July 2011 08:15:00 09:00:00 09:45:00 10:30:00 11:15:00 Time 12:00:00 12:45:00 13:30:00 14:15:00 15:00:00 15:45:00 16:30:00 17:15:00 18:00:00 18:45:00 19:30:00 20:15:00 21:00:00 21:45:00 22:30:00 23:15:00
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Comparison of water use before and after Comparison of Water Usage Wed 13th - Mon 25th July 2011 700 600 500 Litres used 400 300 200 100 0 Wednesday Wednesday Thursday Thursday Friday 15th Friday 22nd Saturday 16th Saturday 23rd Sunday 17th Sunday 24th Monday 18th Monday 25th 13th July 20th July 14th July 21st July July July July July July July July July Time www.ech 2 o.co.uk
Comparison of water use before and after • We show the Wednesday before and after to show W h h W d d b f d f h how much water was used during the filming! (Wednesday 20 th July was date of filming). 20 th J l (W d d d t f fil i ) • The marked difference in use can be seen • On the Sunday after filming the family used more than the Sunday before filming, though still only 300 y g, g y litres between them for the day. • Most of their excessive use was deep baths and Most of their excessive use was deep baths and long showers. www.ech 2 o.co.uk
The family’s water bill if on a meter 3 (C • £1.77/m 3 (Cost for 2011/12 from Thames Water) £1 77/ f 2011/12 f Th W ) • 227 litres/day = 82.9m 3 /year. Metered costs = £147 • Standing charge for water = £27. Standing charge for sewerage = £48 g • At 227 litres/day total cost = £222 • (At 300 litres/day = 109 5m 3 /year = £194 plus • (At 300 litres/day = 109.5m 3 /year = £194 plus standing charges. At 300 litres/day total cost = £269) • The family currently pay over £400 via the rateable value www.ech 2 o.co.uk
With thanks to the McRobie family - Jamie Marie Matthew and Olivia Jamie, Marie, Matthew and Olivia www.ech 2 o.co.uk
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