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Spatial externalities in aquifers with varying thickness: Theory and numerical results for the Ogallala aquifer

Jeffrey Peterson () and Alexander Saak ()

No 150553, 2013 Annual Meeting, August 4-6, 2013, Washington, D.C. from Agricultural and Applied Economics Association

Abstract: This paper studies the divergence in the planning and equilibrium solutions for a multicell aquifer with heterogeneity in cell depths. A spatial model is developed that explicitly accounts for the lateral movement of water between cells. The optimal planning problem maximizes the discounted stream of rents earned from irrigation over an infinite horizon. The optimal steady state of this problem is derived and compared to the competitive equilibrium steady state, which results from myopic rent maximization among users. Studying the steady-state conditions in the two outcomes allows for the nature the spatial externalities to be characterized and reveals the effects of varying cell depths. In a two-cell specification of the model, closed-form expressions are derived for the difference in optimal steady state water table elevations between the two cells. The gap in optimal heights is shown to depend on an interaction between the speed of lateral flows in the aquifer, the asymmetry in cell depths, and the curvature properties of the irrigation benefits function. The 2-cell model is then applied numerically to quantify the spatial externalities and asymmetry effects in Sheridan County, Kansas, which overlies the Ogallala aquifer. Simulated welfare losses in this model are relatively large and are sensitive to the asymmetry in cell depths.

Keywords: Land Economics/Use; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy (search for similar items in EconPapers)
Pages: 15
Date: 2013-06-03
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Persistent link: https://EconPapers.repec.org/RePEc:ags:aaea13:150553

DOI: 10.22004/ag.econ.150553

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