Rainfall harvesting calculator
To calculate the approximate amount of rainwater you
are likely to harvest, use the following formula:
RA x RF x 0.9
RA = Roof area in square metres, RF = Rainfall
in mm, 0.9 = Amount of total rainwater you would expect
to harvest
eg: 100 m2 x 550 mm rainfall
x 0.9 = 49,500 litres
Refer to the anual rainfall chart for major Australian
cities below to help make your calculations.
If you need further information to help calculate
your rainfall harvesting potential
contact Aquaboss, phone 08
8363 9000, fax 08 8363 9494.
Major
Australian cities, average rainfall shown in mm.
CITY |
|
|
|
|
|
|
|
|
|
|
|
|
|
Melbourne |
48.2 |
47.0 |
50.6 |
58.2 |
56.6 |
49.8 |
47.9 |
50.3 |
58.7 |
67.4 |
59.3 |
59.1 |
653.2 |
Albury |
52.8 |
34.6 |
40.8 |
47.5 |
62.9 |
71.9 |
86.7 |
88.5 |
71.4 |
72.5 |
53.2 |
53.9 |
736.7 |
Bendigo |
33.0 |
32.2 |
36.0 |
41.4 |
54.8 |
61.0 |
56.4 |
58.6 |
54.2 |
52.4 |
37.4 |
33.1 |
550.5 |
Canberra |
59.8 |
51.2 |
55.6 |
49.3 |
47.5 |
37.9 |
52.4 |
47.6 |
65.2 |
61.9 |
58.7 |
46.0 |
633.1 |
Sydney |
103.3 |
117.4 |
131.2 |
127.2 |
123.3 |
128.1 |
98.1 |
81.5 |
68.7 |
76.9 |
83.1 |
78.1 |
1217.0 |
Newcastle |
91.4 |
105.6 |
121.9 |
115.9 |
118.6 |
117.8 |
97.2 |
76.2 |
73.7 |
74.3 |
69.5 |
82.4 |
1144.6 |
Wollongong |
106.8 |
108.7 |
118.5 |
131.2 |
115.8 |
109.0 |
91.0 |
61.4 |
66.7 |
68.1 |
71.9 |
86.5 |
1135.6 |
Brisbane |
159.6 |
158.3 |
140.7 |
92.5 |
73.7 |
67.8 |
56.5 |
45.9 |
45.7 |
75.4 |
97.0 |
133.3 |
1146.4 |
Cairns |
386.6 |
453.0 |
420.3 |
197.7 |
93.2 |
46.5 |
28.7 |
27.9 |
34.6 |
39.6 |
94.4 |
180.4 |
2002.8 |
Townsville |
262.8 |
297.5 |
187.8 |
67.6 |
34.6 |
19.6 |
13.0 |
16.5 |
10.1 |
25.6 |
59.3 |
127.0 |
1121.5 |
Gold Coast |
175.3 |
190.0 |
202.0 |
135.8 |
131.5 |
93.0 |
74.6 |
55.8 |
57.9 |
86.7 |
103.8 |
132.1 |
1438.6 |
Adelaide |
19.2 |
13.7 |
26.2 |
38.7 |
62.6 |
83.1 |
77.8 |
68.1 |
63.6 |
48.5 |
29.6 |
26.8 |
558.1 |
Mount
Gambier |
26.5 |
25.6 |
35.8 |
54.7 |
71.8 |
84.7 |
99.6 |
93.5 |
72.8 |
62.6 |
46.5 |
37.4 |
711.5 |
Port Lincoln |
13.2 |
14.8 |
20.0 |
36.4 |
57.4 |
74.6 |
78.9 |
69.0 |
49.7 |
35.9 |
21.9 |
19.1 |
490.9 |
Perth |
8.6 |
13.3 |
19.3 |
45.5 |
122.7 |
182.4 |
172.9 |
134.6 |
79.9 |
54.5 |
21.7 |
13.9 |
869.4 |
Albany |
23.7 |
23.1 |
38.3 |
67.9 |
119.6 |
132.5 |
144.8 |
127.4 |
102.0 |
80.4 |
43.4 |
29.6 |
932.6 |
Kalgoolie |
22.8 |
31.5 |
23.6 |
22.1 |
27.8 |
29.6 |
25.4 |
21.7 |
14.5 |
15.1 |
18.2 |
16.1 |
268.4 |
Broome |
173.0 |
185.0 |
99.6 |
26.6 |
28.7 |
18.2 |
6.3 |
1.7 |
1.5 |
1.4 |
8.1 |
49.1 |
599.2 |
Darwin |
423.3 |
361.1 |
319.3 |
98.9 |
26.5 |
2.0 |
1.4 |
5.7 |
15.4 |
70.7 |
141.8 |
247.9 |
1713.9 |
Alice
Springs |
38.0 |
44.1 |
32.3 |
17.3 |
20.0 |
14.5 |
14.0 |
9.8 |
8.6 |
21.6 |
27.5 |
38.1 |
285.7 |
Katherine |
271.6 |
256.1 |
188.7 |
37.7 |
6.1 |
0.3 |
1.4 |
1.0 |
7.7 |
38.0 |
87.0 |
203.6 |
1099.2 |
Hobart |
48.0 |
39.8 |
45.7 |
51.8 |
47.0 |
54.6 |
52.8 |
53.0 |
52.4 |
62.6 |
54.5 |
57.2 |
619.5 |
Devonport |
44.8 |
37.8 |
48.1 |
62.5 |
77.8 |
82.9 |
99.9 |
90.9 |
76.3 |
67.0 |
57.0 |
52.5 |
797.4 |
Launceston |
51.8 |
28.9 |
34.7 |
53.5 |
67.9 |
67.3 |
79.4 |
83.0 |
66.4 |
55.7 |
49.3 |
45.5 |
683.3 |
Averaged over period of 1908–2004.
Information supplied by the Bureau of meteorology www.bom.gov.au
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