| Water Volume (megalitres) |
length (m) x width (m) x depth (m) / 1000 = megalitres |
| |
1000 litres = 1 metre x 1 metre x 1 metre |
| |
1 hectare x 1 metre deep = 10 megalitres |
| |
|
| Area |
1 hectare = 100 metres x 100 metres |
| |
1 hectare = 2.47 acres |
| |
|
| Catchment area and rainfall |
1 metre x 1 metre with 1 mm of rain = 1 litre |
| |
1 hectare with 100mm of rain = 1 megalitre |
| |
|
| Acceptable pH range |
between 6.5pH to 8.5pH |
| |
|
| Measurement of concentration |
1 mg/lt milligram per litre = 1 ppm part per million |
| |
1 ug/lt - microgram per litre = 1 ppb - part per billion |
| |
1 mg/lt - milligram per litre = 1000ug/lt - microgram per litre |
| |
|
| ANZECC Water Quality Guidelines (all limits in mg/l) |
| |
Potable
Limits
|
Freshwater
Release |
Marine
Release |
Livestock |
Agriculture
Long term |
Agriculture
Short term |
|
mg/l |
mg/l |
mg/l |
mg/l |
mg/l |
mg/l |
| ph value: |
6.5 - 9.0 |
6.5 - 9.0 |
8.0 - 8.5 |
6.5 - 9.0 |
|
|
| Aluminum: |
0.2 |
0.055ph>6.5 |
n/a |
5.0 |
5.0 |
20 |
| Arsenic: |
0.007 |
0.013-0.024 |
n/a |
0.5 |
0.1 |
2.0 |
Cadmium |
0.002 |
0.0002 |
0.0007 |
0.01 |
0.01 |
0.05 |
Chromium: |
0.05 |
0.001 |
0.0044 |
1.0 |
0.1 |
1.0 |
Copper: |
2.0 |
0.0014 |
0.0013 |
1to 5 |
0.2 |
5.0 |
Iron: |
0.3 |
n/a |
n/a |
n/a |
0.2 |
10.0 |
Manganese: |
0.5 |
1.9 |
n/a |
n/a |
0.2 |
10.0 |
Molybdenum: |
0.05 |
n/a |
n/a |
0.15 |
0.01 |
0.05 |
Nickel: |
0.02 |
0.011 |
0.007 |
1.0 |
0.2 |
2.0 |
Lead: |
0.01 |
0.0034 |
0.0044 |
0.1 |
2.0 |
5.0 |
Uranium: |
|
n/a |
n/a |
0.2 |
0.01 |
0.1 |
Zinc: |
5.0 |
0.008 |
0.015 |
20.0 |
2.0 |
5.0 |
Mercury: |
|
0.00006 |
0.0001 |
0.002 |
0.002 |
0.002 |
|
