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Irrigation water productivity in Cambodian rice systems

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  • Christopher Wokker
  • Paulo Santos
  • Ros Bansok

Abstract

Knowledge of the marginal productivity of water is crucial for decisions about its allocation between uses, which is particularly important in the context of increasing competition for water. Using primary, plot-level panel data, this article estimates the marginal productivity of water from supplementary irrigation in lowland rice systems in Cambodia, taking into account farmer and plot heterogeneity as well as self-selection of supplementary irrigation. Our estimates indicate a range of elasticities for rice output with respect to water inputs of between 0.057 and 0.069 for wet season production, substantially lower than previous estimates based on either aggregate or trial data. We discuss the policy implications of these results, in particular with respect to the utility of demand management policies and the challenges they pose to the decentralization of water management to Farmer Water Users Groups.

Suggested Citation

  • Christopher Wokker & Paulo Santos & Ros Bansok, 2014. "Irrigation water productivity in Cambodian rice systems," Agricultural Economics, International Association of Agricultural Economists, vol. 45(4), pages 421-430, July.
    • Handle: RePEc:bla:agecon:v:45:y:2014:i:4:p:421-430
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    File URL: http://hdl.handle.net/10.1111/agec.12096
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    References listed on IDEAS

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    1. Hafeez, M.M. & Bouman, B.A.M. & Van de Giesen, N. & Vlek, P., 2007. "Scale effects on water use and water productivity in a rice-based irrigation system (UPRIIS) in the Philippines," Agricultural Water Management, Elsevier, vol. 92(1-2), pages 81-89, August.
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    Cited by:

    1. X. C. Cao & R. Shu & X. P. Guo & W. G. Wang, 2019. "Scarce water resources and priority irrigation schemes from agronomic crops," Mitigation and Adaptation Strategies for Global Change, Springer, vol. 24(3), pages 399-417, March.
    2. Owusu-Sekyere, Enoch & Bibariwiah, Cindy & Owusu, Victor & Donkor, Emmanuel, 2021. "Farming under irrigation management transfer scheme and its impact on yield and net returns in Ghana," Land Use Policy, Elsevier, vol. 102(C).
    3. Jing Liu & Yu Zhang & Zhongbo Yu, 2018. "Evaluation of Physical and Economic Water-Saving Efficiency for Virtual Water Flows Related to Inter-Regional Crop Trade in China," Sustainability, MDPI, vol. 10(11), pages 1-10, November.
    4. Budy P. Resosudarmo & Kimlong Chheng, 2021. "Irrigation inequality, rice farming productivity and food insecurity in rural Cambodia," Departmental Working Papers 2021-19, The Australian National University, Arndt-Corden Department of Economics.
    5. Cao, Xinchun & Zeng, Wen & Wu, Mengyang & Guo, Xiangping & Wang, Weiguang, 2020. "Hybrid analytical framework for regional agricultural water resource utilization and efficiency evaluation," Agricultural Water Management, Elsevier, vol. 231(C).

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