rain Water Tank measurements for 2008, Mar-Apr 2010, & Nov 2010 to 2011 (davd.i8.com)

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MacClement rain Water Tank graphs: 2008, Mar-Apr 2010, & Nov 2010-2011

{Text containing "_each_ of us uses 15.3 Imp. gallons (70 litres, 18.4 US gallons) per day", below}

Water Tank measurements starting late October 2010; Auckland drought: rain Water Tank, front porch, Greenhithe NZ; measurements, Nov. 2010 on, at: http://davd.i8.com/-/WaterTank-percentFull_2010summer.html#up

Below: March-April 2010 measurements, 2010-late-summer drought: rain Water Tank, front porch, Greenhithe NZ; measurements for 2010, at: http://davd.i8.com/-/WaterTank-percentFull_2010summer.html#up

For comparison with the above average summer use rate = -1.149 percent per day for 2010, below is the 2008 graph with average use rate = -1.145 percent per day;
Being so nearly the same, these numbers prove that we two-to-four people consistently use 8.04 percent of the 4,000 Imp.gallon tank (321.6 Imp.gallons, 1,460 litres) per _week_, or _per_day_: 46 Imp.gallons (209 litres, or 55 U.S. gallons).
This includes two-use water: the vegetable garden and fruit trees are watered from the twice-a-week clothes-wash water.

If you average us at 3 people since the younger couple now live here only 2-to-3 days a week, _each_ of us uses 15.3 Imp. gallons (70 litres, 18.4 U.S. gallons) per day.

- Graph of WaterTank, percent full: David M's household (counting it as 4 adults), Greenhithe NZ; summer 2008 to 25 March. 53 litres (14 US gal.) _per_person_ _per_day_ was our actual average water use over 56 dry days.
-{For the small minority of readers living in the USA:
The tank has 4,800 US gallons of water when full (4,800 * 8/100 = 384).
The weighted-average gradient(slope) of the "summer regime" last 5, is 1.145 (8% drop/week), 384/(4*7) = 13.7 US-gal/person/day.}-

This is: http://davd.i8.com/-/WaterTank-percentFull_2010summer.html#up