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Assessing water resources availability in headwater sub-catchments of Pungwe River Basin in a changing climate

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dc.contributor.author Gumbo, AD
dc.contributor.author Kapangaziwiri, Evison
dc.contributor.author Chikoore, H
dc.contributor.author Pienaar, Harrison H
dc.date.accessioned 2021-08-16T12:29:28Z
dc.date.available 2021-08-16T12:29:28Z
dc.date.issued 2021-06
dc.identifier.citation Gumbo, A., Kapangaziwiri, E., Chikoore, H. & Pienaar, H.H. 2021. Assessing water resources availability in headwater sub-catchments of Pungwe River Basin in a changing climate. <i>Journal of Hydrology: Regional Studies, 35.</i> http://hdl.handle.net/10204/12080 en_ZA
dc.identifier.issn 2214-5818
dc.identifier.uri https://doi.org/10.1016/j.ejrh.2021.100827
dc.identifier.uri http://hdl.handle.net/10204/12080
dc.description.abstract Study Region: The Pungwe River Basin, which is predominantly rural, is a transboundary river shared between Zimbabwe and Mozambique. The riparian communities along the river largely depend on the availability of streamflow for their livelihoods which are now being threatened by the effects of a changing climate. Study focus: The study assessed the effects of climate change on water resources availability in 10 selected headwater sub-catchments of the Pungwe River Basin using the Pitman hydrological model. The model was driven by 10 statistically downscaled climate models forced with RCP 4.5 and RCP 8.5 for the near (2020–2060) and far (2061–2099) futures. New Hydrological Insights for the Region: The results of water resources availability varied, depending on whether the short- or long-term scenarios were modelled. 70 % of the sub-catchments predicted an increase in stream flow for the near- and far-future under the RCP 4.5 emission scenario. Under the RCP 8.5 scenario, a decrease in streamflow was simulated for all sub-catchments with the decrease ranging from -4.17 % to -71.69 %. The reduction in water resources would be significant in the drier parts of the basin than in the wetter parts, which are projected to maintain approximately 90 % of current streamflow levels. Given the uncertainty in future climate simulations, it is prudent that both scenarios be regarded as probabilities. Thus, effective adaptive basin management should consider both. en_US
dc.format Abstract en_US
dc.language.iso en en_US
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S2214581821000562 en_US
dc.source Journal of Hydrology: Regional Studies, 35 en_US
dc.subject Climate change en_US
dc.subject Delta change en_US
dc.subject Headwater catchments en_US
dc.subject Pitman model en_US
dc.subject Pungwe River Basin en_US
dc.subject Rural livelihoods en_US
dc.subject SPAtial and Time Series Information Model en_US
dc.subject SPATSIM en_US
dc.title Assessing water resources availability in headwater sub-catchments of Pungwe River Basin in a changing climate en_US
dc.type Article en_US
dc.description.pages 13pp en_US
dc.description.note © 2021 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full-text item. For access to the full-text item, please consult the publisher's website: https://doi.org/10.1016/j.ejrh.2021.100827 en_US
dc.description.cluster Smart Places en_US
dc.description.impactarea Hydrosciences en_US
dc.identifier.apacitation Gumbo, A., Kapangaziwiri, E., Chikoore, H., & Pienaar, H. H. (2021). Assessing water resources availability in headwater sub-catchments of Pungwe River Basin in a changing climate. <i>Journal of Hydrology: Regional Studies, 35</i>, http://hdl.handle.net/10204/12080 en_ZA
dc.identifier.chicagocitation Gumbo, AD, Evison Kapangaziwiri, H Chikoore, and Harrison H Pienaar "Assessing water resources availability in headwater sub-catchments of Pungwe River Basin in a changing climate." <i>Journal of Hydrology: Regional Studies, 35</i> (2021) http://hdl.handle.net/10204/12080 en_ZA
dc.identifier.vancouvercitation Gumbo A, Kapangaziwiri E, Chikoore H, Pienaar HH. Assessing water resources availability in headwater sub-catchments of Pungwe River Basin in a changing climate. Journal of Hydrology: Regional Studies, 35. 2021; http://hdl.handle.net/10204/12080. en_ZA
dc.identifier.ris TY - Article AU - Gumbo, AD AU - Kapangaziwiri, Evison AU - Chikoore, H AU - Pienaar, Harrison H AB - Study Region: The Pungwe River Basin, which is predominantly rural, is a transboundary river shared between Zimbabwe and Mozambique. The riparian communities along the river largely depend on the availability of streamflow for their livelihoods which are now being threatened by the effects of a changing climate. Study focus: The study assessed the effects of climate change on water resources availability in 10 selected headwater sub-catchments of the Pungwe River Basin using the Pitman hydrological model. The model was driven by 10 statistically downscaled climate models forced with RCP 4.5 and RCP 8.5 for the near (2020–2060) and far (2061–2099) futures. New Hydrological Insights for the Region: The results of water resources availability varied, depending on whether the short- or long-term scenarios were modelled. 70 % of the sub-catchments predicted an increase in stream flow for the near- and far-future under the RCP 4.5 emission scenario. Under the RCP 8.5 scenario, a decrease in streamflow was simulated for all sub-catchments with the decrease ranging from -4.17 % to -71.69 %. The reduction in water resources would be significant in the drier parts of the basin than in the wetter parts, which are projected to maintain approximately 90 % of current streamflow levels. Given the uncertainty in future climate simulations, it is prudent that both scenarios be regarded as probabilities. Thus, effective adaptive basin management should consider both. DA - 2021-06 DB - ResearchSpace DP - CSIR J1 - Journal of Hydrology: Regional Studies, 35 KW - Climate change KW - Delta change KW - Headwater catchments KW - Pitman model KW - Pungwe River Basin KW - Rural livelihoods KW - SPAtial and Time Series Information Model KW - SPATSIM LK - https://researchspace.csir.co.za PY - 2021 SM - 2214-5818 T1 - Assessing water resources availability in headwater sub-catchments of Pungwe River Basin in a changing climate TI - Assessing water resources availability in headwater sub-catchments of Pungwe River Basin in a changing climate UR - http://hdl.handle.net/10204/12080 ER - en_ZA
dc.identifier.worklist 24662 en_US


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