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Climate Change Impact on Water Resources; The Case of Tono Irrigation Dam in Ghana

Received: 25 October 2020    Accepted: 05 November 2020    Published: 30 November 2020
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Abstract

West Africa (WA) in recent past experienced decreasing rainfall and increasing temperature. A preliminary assessment of these trends in the future (2025-2045) was conducted to evaluate its potential impact on water resources, specifically the Tono irrigation dam in Ghana. The climate change assessment was based on future climate data of Representative Concentration Pathways (RCPs) 4.5 and 8.5 projected with ECHAM6 model and downscaled by the Weather Research and Forecasting (WRF) model in reference with historical data (1990-2010). A 2-domain configuration was used: an outer domain at 25 km horizontal resolution encompassing the West African Region and an inner domain at 5 km horizontal resolution centered on the Tono basin. The assessment was done based on the annual mean, relative percentage change and spatial seasonal change of the simulated precipitation and temperature. The results show that for precipitation, both scenarios do not agree on the signal of change. RCP4.5 indicates an increase (+7%) in annual precipitation amount whereas RCP 8.5 indicates a decrease (-9.6%). For temperature, both scenarios agree on increasing temperature. These results shows that future streamflow will be influenced by climate change. The indications are that the flows will reduce does the dam levels will also reduce does affecting irrigation activities. This studies therefore provides information to the managers of Tono irrigation dam what measures to put in place for its sustainability.

DOI 10.11648/j.hyd.20200804.12
Published in Hydrology (Volume 8, Issue 4, December 2020)
Page(s) 69-78
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

RCPs, Climate Change, Streamflow, WRF Model, Water Resources, Sustainability

References
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Author Information
  • Department of Agricultural Engineering, Bolgatanga Technical University, Bolgatanga, Ghana

  • School of Earth and Environment, University of Leeds, Leeds, UK

  • Laboratoire de Physique de, University Félix Houphouet-Boigny, Abidjan, C?te d’Ivoire

  • Department of Physics, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana

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    Edward Naabil, Benjamin Lantei Lamptey, Kouakou Kouadio, Thompson Annor. (2020). Climate Change Impact on Water Resources; The Case of Tono Irrigation Dam in Ghana. Hydrology, 8(4), 69-78. https://doi.org/10.11648/j.hyd.20200804.12

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    Edward Naabil; Benjamin Lantei Lamptey; Kouakou Kouadio; Thompson Annor. Climate Change Impact on Water Resources; The Case of Tono Irrigation Dam in Ghana. Hydrology. 2020, 8(4), 69-78. doi: 10.11648/j.hyd.20200804.12

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    AMA Style

    Edward Naabil, Benjamin Lantei Lamptey, Kouakou Kouadio, Thompson Annor. Climate Change Impact on Water Resources; The Case of Tono Irrigation Dam in Ghana. Hydrology. 2020;8(4):69-78. doi: 10.11648/j.hyd.20200804.12

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  • @article{10.11648/j.hyd.20200804.12,
      author = {Edward Naabil and Benjamin Lantei Lamptey and Kouakou Kouadio and Thompson Annor},
      title = {Climate Change Impact on Water Resources; The Case of Tono Irrigation Dam in Ghana},
      journal = {Hydrology},
      volume = {8},
      number = {4},
      pages = {69-78},
      doi = {10.11648/j.hyd.20200804.12},
      url = {https://doi.org/10.11648/j.hyd.20200804.12},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.hyd.20200804.12},
      abstract = {West Africa (WA) in recent past experienced decreasing rainfall and increasing temperature. A preliminary assessment of these trends in the future (2025-2045) was conducted to evaluate its potential impact on water resources, specifically the Tono irrigation dam in Ghana. The climate change assessment was based on future climate data of Representative Concentration Pathways (RCPs) 4.5 and 8.5 projected with ECHAM6 model and downscaled by the Weather Research and Forecasting (WRF) model in reference with historical data (1990-2010). A 2-domain configuration was used: an outer domain at 25 km horizontal resolution encompassing the West African Region and an inner domain at 5 km horizontal resolution centered on the Tono basin. The assessment was done based on the annual mean, relative percentage change and spatial seasonal change of the simulated precipitation and temperature. The results show that for precipitation, both scenarios do not agree on the signal of change. RCP4.5 indicates an increase (+7%) in annual precipitation amount whereas RCP 8.5 indicates a decrease (-9.6%). For temperature, both scenarios agree on increasing temperature. These results shows that future streamflow will be influenced by climate change. The indications are that the flows will reduce does the dam levels will also reduce does affecting irrigation activities. This studies therefore provides information to the managers of Tono irrigation dam what measures to put in place for its sustainability.},
     year = {2020}
    }
    

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  • TY  - JOUR
    T1  - Climate Change Impact on Water Resources; The Case of Tono Irrigation Dam in Ghana
    AU  - Edward Naabil
    AU  - Benjamin Lantei Lamptey
    AU  - Kouakou Kouadio
    AU  - Thompson Annor
    Y1  - 2020/11/30
    PY  - 2020
    N1  - https://doi.org/10.11648/j.hyd.20200804.12
    DO  - 10.11648/j.hyd.20200804.12
    T2  - Hydrology
    JF  - Hydrology
    JO  - Hydrology
    SP  - 69
    EP  - 78
    PB  - Science Publishing Group
    SN  - 2330-7617
    UR  - https://doi.org/10.11648/j.hyd.20200804.12
    AB  - West Africa (WA) in recent past experienced decreasing rainfall and increasing temperature. A preliminary assessment of these trends in the future (2025-2045) was conducted to evaluate its potential impact on water resources, specifically the Tono irrigation dam in Ghana. The climate change assessment was based on future climate data of Representative Concentration Pathways (RCPs) 4.5 and 8.5 projected with ECHAM6 model and downscaled by the Weather Research and Forecasting (WRF) model in reference with historical data (1990-2010). A 2-domain configuration was used: an outer domain at 25 km horizontal resolution encompassing the West African Region and an inner domain at 5 km horizontal resolution centered on the Tono basin. The assessment was done based on the annual mean, relative percentage change and spatial seasonal change of the simulated precipitation and temperature. The results show that for precipitation, both scenarios do not agree on the signal of change. RCP4.5 indicates an increase (+7%) in annual precipitation amount whereas RCP 8.5 indicates a decrease (-9.6%). For temperature, both scenarios agree on increasing temperature. These results shows that future streamflow will be influenced by climate change. The indications are that the flows will reduce does the dam levels will also reduce does affecting irrigation activities. This studies therefore provides information to the managers of Tono irrigation dam what measures to put in place for its sustainability.
    VL  - 8
    IS  - 4
    ER  - 

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