Maui Island in the State of Hawaii faces changing water demands as it grows. Sustainably and fairly managing freshwater resources on the island demands a good understanding of surface and groundwater availability (both quantity and quality), surface and groundwater relationships, and the long- and short-term impacts of allocation decisions. Data on the quantity of water that is and will be available under various development scenarios is limited, as flows are not measured on all (or even most) of Maui's streams. This is particularly challenging because regulations and allocations are based on quantitative flow standards. This work informs a broader analysis of Maui's long-term water management options by reviewing existing empirical equations for estimating stream flow on Maui.
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