rainwatercalcs
 Share
The version of the browser you are using is no longer supported. Please upgrade to a supported browser.Dismiss

 
View only
 
 
Still loading...
ABCDEFGHIJKLMNOPQRST
1
Sizing a Rainwater Tank based on Climatological and Usage Data
2
User InputUnitsgiven
3
Footprint1600ft2149m27.48052gal/ft3
4
Efficiency0.9roof material dependent12in/ft
5
Size of Tank1500gal
6
7
ID #JanFebMarAprMayJunJulAugSepOctNovDecAvgTotNotes:
8
Rainfall (in)5.975.515.552.911.620.650.160.380.862.365.786.353.1838.1http://ggweather.com/normals/MO.htm
9
Collection Capacity (gal)53594946498226121454583144341772211851885700285034,200.94rain fall (in) * 1 ft/12 in * collection area (ft2) * 7.48 gal/ft3 * roof coefficient
10
Usage (gal)200020002000200020002000200020002000200020002000200024000Calculate from rules of thumb or get from bill.
11
Tank Vol, starting full in Jan (gal)1500150015001500954-1-1-1-111715001500839These are the 1st year tank volumes.
12
2nd year tank volume (gal)1500150015001500954-1-1-1-111715001500839These are the 2nd year tank volumes.
13
Tank can't fill up past capacity for the month. -1 means need exceeds availability.
14
RecommendationAt least one month with not enough waterIf the end of the second year is lower than the end of the first year, than attrition is occurring. If any of the two years of calcs falls bellow zero, it is noted.
15
16
17
18
19
20
21
22
23
24
25
26
27
Loading...
 
 
 
Collection Calcs
RegionalClimateData