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Coastal Groundwater Management with Nearshore Resource Interactions

Sittidaj Pongkijvorasin, James Roumasset and Thomas Duarte
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Sittidaj Pongkijvorasin: Department of Economics, University of Hawaii at Manoa
Thomas Duarte: Department of Botany, University of Hawaii at Manoa

No 200713, Working Papers from University of Hawaii at Manoa, Department of Economics

Abstract: This paper develops a regional hydrologic-ecologic-economic model of groundwater use and a nearshore ecosystem. Particularly, we model coastal groundwater management and its effects on discharge, nearshore water quality, and marine biota (e.g., indigenous marine algae). We show that incorporating the external effects on nearshore resources increases the optimal steady-state head level. Numerical simulations are illustrated using data from the Kuki’o region on the island of Hawaii. Two different approaches for incorporating the nearshore resource are examined. We find that including algae’s market value directly in the objective function calls for lower, albeit slightly lower, water extraction rate in all periods. If a minimum constraint is placed on the stock of the keystone species, greater conservation may be indicated. The constraint also results in non-monotonic paths of water extraction, head level, and water price in the optimal solution.

Keywords: groundwater management; submarine groundwater discharge; stock externality; nearshore resources; safe minimum standard; marine algae; dynamic optimization model (search for similar items in EconPapers)
JEL-codes: C61 D62 Q25 Q28 (search for similar items in EconPapers)
Pages: 36 pages
Date: 2007-07-07
New Economics Papers: this item is included in nep-agr, nep-env and nep-res
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http://www.economics.hawaii.edu/research/workingpapers/WP_07-13.pdf First version, 2007 (application/pdf)

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