Rain Water Harvesting:-
An extra benefit achieved by the inclusion of the sails under the
track is the capture of rain water.
For each 1000 mm of rain, the 9 metre wide sails will harvest 900 ML (900,000,000
L) of water per 100 kilometres of track. This would provide the water needs of nearly
12,330 people for a year at the usage rate of 200 L of water per person
The columns will provide temporary storage reservoirs. At
the base of each column, a small pump will pump the water into a pipe
suspended under the tracks to reservoirs in various suitable
locations (e.g. underground in a park).
This water will be of high quality as it will have had no contact
with the ground or any vegetable matter. Due to it's high quality, the
water will require only basic treatment before being pumped directly into the
water reticulation system, obviating the need for large diameter, long distance, costly trunk water mains from new dams etc.
In 2006 (a dry year), the recorded rainfall at the Gold Coast
Seaway was 1072.8 mm and at Coolangatta was 1740.2 mm giving an average of
1406.5 mm for the Gold Coast.
In 2006, the MonoCab VRT 200 km proposal for the Gold Coast would
have captured 2,530 ML of water. This is equivalent to 19.5 days supply
for the Gold Coast at the Council's target consumption of 130 ML per day. This would have provided the
water needs of 34,680 Gold Coast residents for a year at the usage rate
of 200 L of water per person per day.
The 2,530 ML is equivalent to the capacity of 1,265,850
water tanks of 2000 L capacity. Assuming an installed cost of $1,500.00 per water tank, the MonoCab VRT
solution supplants the expenditure of $1,898 million for water tanks for
equivalent water capture.
Points of Interest:-
Less than 1% of the world’s fresh water (or about 0.007% of all
water on earth) is readily accessible for direct human use.
The United Nations estimates that two-thirds of the world's
population will not have reliable supplies of potable water by 2025 if current trends are not reversed.
In 2002, the United Nations Committee on Economic, Cultural and
Social Rights declared access to water a human right, stating that water is a social and cultural good.
It has been estimated that for every two litre bottle of water on
the supermarket shelf, energy equivalent to a half litre of oil has been utilised in the its manufacture
A reliable supply of potable water is becoming quite critical in
many parts of the world. Entering "potable water" in Google will return many entries showing concerns by
Governments and their citizens. In particular, go to the water.org web site.