The information about the method for conservation of the rain water to use it as drinking water in an Australian town has been depicted in the given diagram.
Looking from an overall perspective, it is readily apparent that water falling on the rooftops is been collected and then after going through a purification process, it is again transmitted to those homes to use for drinking purpose. In these process the two largest containers are being used, one is for Storage and the other for water treatment.
Looking into details of the given diagram of the process, it can be seen that the water from the rooftops of the houses in a particular area gets directed to a common pipeline where the rain water slong with some impurities goes to the water filter. The filter removes some measurable dust and then it is sent to the common storage container that might be fixed under the ground. Further it gets treated with some chemicals after being filled in the treatment container. In this container, some chemical seems to get mixed with the water in order to kill the remaining impurities after which it gets completely feasible for drinking. After this long purification process, this water is sent to the same houses from where it had been collected. So, by this way the rain water has been used in a prominent way without letting it to be wasted.