Rainwater harvesting augmentation of domestic water supply in Honiara, Solomon Islands

Type Journal Article - Australian Journal of Water Resources
Title Rainwater harvesting augmentation of domestic water supply in Honiara, Solomon Islands
Author(s)
Volume 20
Issue 1
Publication (Day/Month/Year) 2016
Page numbers 65-77
URL http://www.tandfonline.com/doi/full/10.1080/13241583.2016.1173314
Abstract
Secure and sanitary water supply is essential for human health and well-being. The challenges in meeting this demand are great in Small Island Developing States where water resources may be limited due to social and environmental constraints. In Honiara, Solomon Islands, a number of factors have constrained access to fresh water including: rapid population growth and urbanisation; neglected water infrastructure; the ethnic tensions; water tariff increases of 170% in the past 3 years; sole reliance on groundwater; and poor supporting electrical infrastructure. Within this context, the case for using rainwater tanks as either a predominant source or for augmentation of existing domestic water supply has been explored. The effect of historical drought events on rainwater tanks has been examined. A water balance model has been developed and various household scenarios reviewed to determine the reliability of domestic rainwater tanks over a 28-year period. The development of this model has highlighted both opportunities and limitations in Honiara that can be used to inform decision-makers and planners in water resources management.

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