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A General Equilibrium Analysis Of Conjunctive Ground And Surface Water Use With An Application To Morocco

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  • Diao, Xinshen
  • Dinar, Ariel
  • Roe, Terry L.
  • Tsur, Yacov

Abstract

Groundwater resources (GW) account for nearly 30 percent of the world sustainable water supplies. Yet, this resource, which is fraught with externalities, has largely been left unregulated. The economic literature on GW is predominantly of a partial equilibrium type, taking the rest of the economy parametrically. We analyze GW regulation in a general equilibrium setting, focusing on the stabilization value of GW under natural (draught) and economic (rural-urban water transfer) shocks. A general equilibrium approach allows evaluating direct and indirect effects of GW regulation on agriculture and non-agriculture sectors and extends the scope for water policy. The analysis is applied to Morocco by extending an existing computable general equilibrium (CGE) model to include ground and surface water (SW) resources. We study effects of (i) an increase in GW extraction cost (e.g., as a result of prolonged extraction beyond natural recharge that lowers the aquifer's water table), (ii) a transfer of SW from rural (irrigation) to urban (domestic) use, and (iii) a reduction of water availability due to severe drought. We estimate the value of GW and assess the direct (partial equilibrium) and indirect (general equilibrium) impacts. We find that GW has a critical role in mitigating the negative effects of these types of shocks.

Suggested Citation

  • Diao, Xinshen & Dinar, Ariel & Roe, Terry L. & Tsur, Yacov, 2007. "A General Equilibrium Analysis Of Conjunctive Ground And Surface Water Use With An Application To Morocco," Discussion Papers 7143, Hebrew University of Jerusalem, Department of Agricultural Economics and Management.
    • Handle: RePEc:ags:huaedp:7143
    DOI: 10.22004/ag.econ.7143
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    References listed on IDEAS

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    1. Tsur, Yacov & Graham-Tomasi, Theodore, 1991. "The buffer value of groundwater with stochastic surface water supplies," Journal of Environmental Economics and Management, Elsevier, vol. 21(3), pages 201-224, November.
    2. Rosegrant, Mark W. & Cai, Ximing & Cline, Sarah A., 2002. "Water and food to 2025," 2020 vision briefs 13, International Food Policy Research Institute (IFPRI).
    3. Knapp Keith C. & Olson Lars J., 1995. "The Economics of Conjunctive Groundwater Management with Stochastic Surface Supplies," Journal of Environmental Economics and Management, Elsevier, vol. 28(3), pages 340-356, May.
    4. Diao, Xinshen & Roe, Terry & Doukkali, Rachid, 2005. "Economy-wide gains from decentralized water allocation in a spatially heterogenous agricultural economy," Environment and Development Economics, Cambridge University Press, vol. 10(3), pages 249-269, June.
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    Cited by:

    1. Cakmak, Erol H. & Dudu, Hasan & Saracoglu, Sirin & Diao, Xinshen & Roe, Terry & Tsur, Yacov, 2008. "Macro-Micro Feedback Links Of Irrigation Water Management In Turkey," Policy Research Working Paper Series 4781, The World Bank.

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