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Rainwater Harvesting under Endogenous Capacity of Storage: A Solution to Aquifer Preservation?
Hubert Stahn and Agnes Tomini
Annals of Economics and Statistics
No. 119/120, SPECIAL ISSUE ON HEALTH AND LABOUR ECONOMICS (December 2015), pp. 209-234
Stable URL: http://www.jstor.org/stable/10.15609/annaeconstat2009.119-120.209
Page Count: 28
You can always find the topics here!Topics: Groundwater, Aquifers, Rain, Financial investments, Water harvesting, Water tables, Pumping, Depreciation, Cost functions, Sustainable development
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This paper studies groundwater management in the presence of rainwater harvesting (RWH). We propose a two-state model that takes into account the dynamics of the aquifer and the standard dynamics of the storage capacity, and we assume that the collection of rainwater reduces the natural recharge. We analyze the trade-off between these two water harvesting techniques in an optimal control model. In particular, we show that, when these techniques are perfect substitutes, the development of RWH leads in the long run to a depletion of the water table, even if pumping is reduced. This result is illustrated by a numerical application for the Pecos River Basin (New Mexico, USA). JEL: Q25, C61, D61. / KEY WORDS: Rainwater Harvesting, Conjunctive Use, Groundwater Management, Optimal Control.
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