Climate Variability and Influent Streams in The Kwa Iboe River Basin of South-East Nigeria
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Abstract
This study examined the impacts of climate variability on influent streams in Kwa Iboe River Basin of south-east Nigeria. It covered the Ibom Sub-Basin of Kwa Iboe River Basin, where the sampling fraction concept was employed to select three streams for the study. Random sampling technique was employed in administering 288 copies of structured questionnaire to households in the sample communities. Hypothesis was formulated and tested using Climate elasticity of streamflow index. The study revealed changes in the Stream order, bifurcation ratio, basin size, basin length, lemniscate’s factor and form factor of the basin between 1989 and 2019. Stream number dropped from 32 to 30 between 1989 and 2019. The research revealed that annual mean temperature and precipitation has changed over the period. Annual mean temperature dropped between 1989 and 2019. Annual mean precipitation also increased between 2010 and 2019. It also showed that the amount of runoff is highly sensitive to changes in climate. Implementation of water use efficiency, mainstreaming climate change adaptation, sharing knowledge on climate and planned dredging of streams are recommendations for adaptive management of streams.
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