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Multi-Dimensional Evaluation of Simulated Small-Scale Irrigation Intervention: A Case Study in Dimbasinia Watershed, Ghana

Author

Listed:
  • Abeyou W. Worqlul

    (Blackland Research Center, Texas A & M University, Temple, TX 76502, USA)

  • Yihun T. Dile

    (Spatial Sciences Laboratory, Texas A & M University, Temple, TX 77843, USA)

  • Jean-Claude Bizimana

    (Department of Agricultural Economics, Texas A & M University, College Station, TX 77843, USA)

  • Jaehak Jeong

    (Blackland Research Center, Texas A & M University, Temple, TX 76502, USA)

  • Thomas J. Gerik

    (Blackland Research Center, Texas A & M University, Temple, TX 76502, USA)

  • Raghavan Srinivasan

    (Spatial Sciences Laboratory, Texas A & M University, Temple, TX 77843, USA)

  • James W. Richardson

    (Department of Agricultural Economics, Texas A & M University, College Station, TX 77843, USA)

  • Neville Clarke

    (The Norman Borlaug Institute for International Agriculture, Texas A & M AgriLife Research, College Station, TX 77843, USA)

Abstract

This paper studied the impacts of small-scale irrigation (SSI) interventions on environmental sustainability, agricultural production, and socio-economics using an Integrated Decision Support System (IDSS). The IDSS is comprised of a suite of models, namely the Soil and Water Assessment Tool (SWAT), Agricultural Policy/Environmental eXtender (APEX), and Farm Income and Nutrition Simulator (FARMSIM). The IDSS was applied in Dimbasinia watershed in northern Ghana using irrigation water from shallow groundwater. The watershed has a modest amount of shallow groundwater resources. However, the average annual irrigation water requirement exceeded the average annual shallow groundwater recharge. It was found that the current crop yield in Dimbasinia watershed was only ~40% of the potential crop production. This is mainly related to climate variability, low soil fertility, and land-management practices. For example, application of 50 kg/ha urea and 50 kg/ha DAP doubled maize and sorghum yield from the current farmers’ practices. Better income was obtained when irrigated vegetables/fodder were cultivated in rotation with sorghum as compared to in rotation with maize. Investment in solar pumps paid better dividends and also supplied clean energy. The socio-economic analysis indicated that having irrigated dry season vegetables will improve household nutrition. Since shallow groundwater recharge alone may not provide sufficient water for irrigation in a sustainable manner, surface water may be stored using water-harvesting structures to supplement the groundwater for irrigation. Integrated use of the water resources will also reduce depletion of the shallow groundwater aquifer. We conclude that IDSS is a promising tool to study gaps and constraints as well as upscaling of SSI.

Suggested Citation

  • Abeyou W. Worqlul & Yihun T. Dile & Jean-Claude Bizimana & Jaehak Jeong & Thomas J. Gerik & Raghavan Srinivasan & James W. Richardson & Neville Clarke, 2018. "Multi-Dimensional Evaluation of Simulated Small-Scale Irrigation Intervention: A Case Study in Dimbasinia Watershed, Ghana," Sustainability, MDPI, vol. 10(5), pages 1-23, May.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:5:p:1531-:d:145805
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    References listed on IDEAS

    as
    1. Namara, Regassa E & Awuni, J. A. & Barry, Boubacar & Giordano, Mark & Hope, Lesley & Owusu, Eric S. & Forkuor, Gerald, 2011. "Smallholder shallow groundwater irrigation development in the upper east region of Ghana," IWMI Research Reports H044687, International Water Management Institute.
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    7. Rockström, Johan & Karlberg, Louise & Wani, Suhas P. & Barron, Jennie & Hatibu, Nuhu & Oweis, Theib & Bruggeman, Adriana & Farahani, Jalali & Qiang, Zhu, 2010. "Managing water in rainfed agriculture--The need for a paradigm shift," Agricultural Water Management, Elsevier, vol. 97(4), pages 543-550, April.
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    1. Worqlul, Abeyou W. & Dile, Yihun T. & Schmitter, Petra & Jeong, Jaehak & Meki, Manyowa N. & Gerik, Thomas J. & Srinivasan, Raghavan & Lefore, Nicole & Clarke, Neville, 2019. "Water resource assessment, gaps, and constraints of vegetable production in Robit and Dangishta watersheds, Upper Blue Nile Basin, Ethiopia," Agricultural Water Management, Elsevier, vol. 226(C).

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