Concavity and monotonicity properties in a groundwater management model

Woonghee Tim Huh, Chandra Kiran Krishnamurthy and Richard Weber

Naval Research Logistics (NRL), 2011, vol. 58, issue 7, 670-675

Abstract: We consider a discrete‐time groundwater model in which the cost of pumping takes a slightly different form to that which has been traditional in the research literature to date. This enables us to prove that (a) the optimal pumping quantity is nondecreasing in the ground water stock, (b) the stock level remaining after each period's pumping is also nondecreasing in the groundwater stock, (c) the optimal decision is determined by maximizing a concave function, and finally (d) the optimal pumping quantity is nonincreasing in the number of periods to go. We show that (a)–(c), while intuitive, do not hold under traditional modeling assumptions. We also explain the connections between our results and similar ones for some classic problems of operations research. © 2011 Wiley Periodicals, Inc. Naval Research Logistics 00: 000–000, 2011

Date: 2011
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Persistent link: https://EconPapers.repec.org/RePEc:wly:navres:v:58:y:2011:i:7:p:670-675

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