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Open AccessArticle10.1016/j.ejrh.2015.05.013

Uncertainty of runoff projections under changing climate in Wami River sub-basin

Frank Joseph Wambura,Preksedis M. Ndomba,Victor Kongo,S. D. Tumbo-2015-07-28-Journal of Hydrology Regional Studies
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TL;DRAbstract

STUDY REGION: The Wami River sub-basin is among the river sub-basins with a vital ecosystem in Tanzania. It comprises the Saadani National park and it has the very great potential of irrigation and rain fed agriculture. STUDY FOCUS: The objective of this study was to evaluate the uncertainty of future streamflow in respect of increasing water demands and uncertain projected climate inputs, General Circulation Models (GCMs). The water demands were projected to the year 2039 and GCM precipitation was selected as the changing climatic variable. The CMIP5-GCMs were evaluated for their skills and those with the minimum skill scores above 75% were downscaled and used in projection of scenario RCP 8.5 precipitation. Then uncertainties of RCP 8.5 precipitation were estimated using a fuzzy extension principle and finally used to simulate uncertainties of future runoff using a rainfall-runoff model, Soil and Water Assessment Tool (SWAT). NEW HYDROLOGICAL INSIGHTS FOR THE REGION: The results of p

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STUDY REGION: The Wami River sub-basin is among the river sub-basins with a vital ecosystem in Tanzania. It comprises the Saadani National park and it has the very great potential of irrigation and rain fed agriculture. STUDY FOCUS: The objective of this study was to evaluate the uncertainty of future streamflow in respect of increasing water demands and uncertain projected climate inputs, General Circulation Models (GCMs). The water demands were projected to the year 2039 and GCM precipitation was selected as the changing climatic variable. The CMIP5-GCMs were evaluated for their skills and those with the minimum skill scores above 75% were downscaled and used in projection of scenario RCP 8.5 precipitation. Then uncertainties of RCP 8.5 precipitation were estimated using a fuzzy extension principle and finally used to simulate uncertainties of future runoff using a rainfall-runoff model, Soil and Water Assessment Tool (SWAT). NEW HYDROLOGICAL INSIGHTS FOR THE REGION: The results of p

Keywords

Environmental scienceStreamflowPrecipitationSoil and Water Assessment ToolBaseline (sea)Surface runoffHydrology (agriculture)Structural basin

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