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Friday, November 29, 2013
UHERO: Water Trading to Control Hawaii Aquifers?
By UHERO @ 4:03 PM :: 4420 Views :: Environment, Cost of Living

Ordering Extraction from Multiple Aquifers

UHERO November 26, 2013

Optimal groundwater extraction satisfies the condition that the marginal benefits of water consumption equal the full marginal cost of extraction in each period, including the opportunity cost of future benefits foregone. But how should this well-known condition be generalized when there are multiple aquifers available?

We provide an extension of the “Pearce equation” to guide the optimal ordering of resource extraction and an illustrative application wherein it is optimal to extract from the “leakiest” aquifer first, letting another aquifer increase in volume.

This generalized least cost-first principle contrasts strongly with the sustainable yield approach. By including spatial dimensions, the model provides the marginal valuations of water at each time and place, such that full marginal cost pricing can incentivize users to implement the efficient program.

While an untrammeled water market would fail to provide the optimal solution, regulators can facilitate efficient water trading by setting appropriate exchange rates.

read … Working Paper

Related: OHA Trustees claim ownership of your drinking water

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