DISCHARGE GENERATION USING COMBINED THORNWAITE WATER BALANCE AND IHACRES MODELS: A CASE STUDY OF THE ASA RIVER BASININ NIGERIA

Many rainfall - runoff models exist for the estimation of streamflow discharges in ungauged basins. However, most of the parameters needed to run the models are not easily obtainable in many countries like Nigeria, hence their application is limited.The situation is even more critical when discharge...

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Bibliographic Details
Published inAnnals of Faculty Engineering Hunedoara Vol. 13; no. 3; p. 89
Main Authors Bilewu, S O, Sule, B F
Format Journal Article
LanguageEnglish
Published Hunedoara Faculty of Engineering Hunedoara 01.08.2015
Subjects
Creeks & streams
Rain
River basins
Water
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Summary:Many rainfall - runoff models exist for the estimation of streamflow discharges in ungauged basins. However, most of the parameters needed to run the models are not easily obtainable in many countries like Nigeria, hence their application is limited.The situation is even more critical when discharge data of rivers are scarce and unreliable. This study identifies two models that are amenable to the nature of data available for many rivers in Nigeria. A combination of the Thornwaite Water Balance (TWBM) and the IHACRES Models was applied to the Asa river basin in central Nigeria. Available rainfall data is of a satisfactory quality while the corresponding discharge data is fragmented and only a short portion can be considered acceptable. The acceptable data was used to calibrate the models and subsequently used to generate a better discharge data. The study has thus shown that the IHACRES model is suitable for use under the hydrological setting and data availability situation in Nigeria. This method can be applied in ungauged basin with similar data scarcity as Nigeria.
ISSN:1584-2665
2601-2332