This little booklet (27MB) sets out what it claims to explain: a summary of the hydrological conditions on the Island.
In its own words:
“The complex hydrogeological conditions…as well as the unique cultural and social heritage values of the island’s community require an innovative approach to water and wastewater management in this small isolated community. This paper brings together existing information on the hydrology of Norfolk Island to assist in the development of a sustainable water management strategy, particularly targeted at extended dry periods. It represents the first stage in establishing a framework for water and wastewater management on Norfolk Island.”
That cause was picked up later by CSIRO in its much more extensive studies.
This booklet was produced in 2007 by The Government of Norfolk Island with funding from the Natural Heritage Trust.