Analysis of hydrometeorological variables over the transboundary komadugu-yobe basin, West Africa

O. E. Adeyeri; P. Laux; A. E. Lawin; S. O. Ige; H. Kunstmann

doi:10.2166/wcc.2019.283

Analysis of hydrometeorological variables over the transboundary komadugu-yobe basin, West Africa

O. E. Adeyeri^*
, P. Laux
, A. E. Lawin
, S. O. Ige
, H. Kunstmann

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

30 Citations (Scopus)

27 Downloads (CityUHK Scholars)

Abstract

Spatiotemporal trends in daily observed precipitation, river discharge, maximum and minimum temperature data were investigated between 1971 and 2013 in the Komadugu-Yobe basin. Significant change points in time series are corrected using Adapted Caussinus-Mestre Algorithm for homogenizing Networks of Temperature series algorithm. Mann–Kendall test and Sen’s slope are used to estimate the trend and its magnitude at dry, wet and annual season time scales, respectively. Preliminary results show an increasing trend of the observed variables. There is a latitudinal increase (decrease) in the basin temperature (precipitation) from lower to higher latitudes. The minimum temperature (0.05°C/year) increases faster than the maximum temperature (0.03°C/ year). Overall, the percentage changes in minimum temperature range between 3 and 10% while that of maximum temperature ranges between 1 and 3%. Due to precipitation dependence on regional characteristics, the highest percentage change was recorded in precipitation with values between 5 and 97%. In all time scales, river discharge and precipitation have strong positive correlations while the correlation between river discharge and temperature is negative. It is imperative to advocate and support positive developmental practices as well as establishing necessary mitigation measures to cope with the effects of climate in the basin.

Original language	English
Pages (from-to)	1339-1354
Number of pages	16
Journal	Journal of Water and Climate Change
Volume	11
Issue number	4
Online published	16 Jul 2019
DOIs	https://doi.org/10.2166/wcc.2019.283
Publication status	Published - Dec 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2020 The Authors.

Funding

The first author was supported by a doctoral scholarship from the Federal Ministry of Education and Research (BMBF) and West African Science Service Center on Climate Change and Adapted Land Use (WASCAL). The authors wish to acknowledge the Direction de la M?t?orologie Nationale (DMN) of Niger Republic, the Nigeria Meteorological Agency (NiMet) for the climate data used in this study. We also acknowledge the fruitful discussions with Seyni Salack of the WASCAL competent centre, Burkina Faso. We extend our thanks to Peter Domonkos for the provision of the ACMANT package as well as the constructive discussions regarding the use of ACMANT. The anonymous reviewers are also acknowledged. The authors have read and understood the policy on declaration of interests and declare that we have no competing interests. The first author was supported by a doctoral scholarship from the Federal Ministry of Education and Research (BMBF) and West African Science Service Center on Climate Change and Adapted Land Use (WASCAL). The authors wish to acknowledge the Direction de la Météorologie Nationale (DMN) of Niger Republic, the Nigeria Meteorological Agency (NiMet) for the climate data used in this study. We also acknowledge the fruitful discussions with Seyni Salack of the WASCAL competent centre, Burkina Faso. We extend our thanks to Peter Domonkos for the provision of the ACMANT package as well as the constructive discussions regarding the use of ACMANT. The anonymous reviewers are also acknowledged. The authors have read and understood the policy on declaration of interests and declare that we have no competing interests.

Research Keywords

Homogeneity tests in hydrometeorological variables
Komadugu-Yobe basin
Lake Chad region
Return period
Trends in hydrometeorological variables
Wavelet

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title = "Analysis of hydrometeorological variables over the transboundary komadugu-yobe basin, West Africa",

abstract = "Spatiotemporal trends in daily observed precipitation, river discharge, maximum and minimum temperature data were investigated between 1971 and 2013 in the Komadugu-Yobe basin. Significant change points in time series are corrected using Adapted Caussinus-Mestre Algorithm for homogenizing Networks of Temperature series algorithm. Mann–Kendall test and Sen{\textquoteright}s slope are used to estimate the trend and its magnitude at dry, wet and annual season time scales, respectively. Preliminary results show an increasing trend of the observed variables. There is a latitudinal increase (decrease) in the basin temperature (precipitation) from lower to higher latitudes. The minimum temperature (0.05°C/year) increases faster than the maximum temperature (0.03°C/ year). Overall, the percentage changes in minimum temperature range between 3 and 10\% while that of maximum temperature ranges between 1 and 3\%. Due to precipitation dependence on regional characteristics, the highest percentage change was recorded in precipitation with values between 5 and 97\%. In all time scales, river discharge and precipitation have strong positive correlations while the correlation between river discharge and temperature is negative. It is imperative to advocate and support positive developmental practices as well as establishing necessary mitigation measures to cope with the effects of climate in the basin.",

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year = "2020",

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doi = "10.2166/wcc.2019.283",

language = "English",

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AU - Ige, S. O.

AU - Kunstmann, H.

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AB - Spatiotemporal trends in daily observed precipitation, river discharge, maximum and minimum temperature data were investigated between 1971 and 2013 in the Komadugu-Yobe basin. Significant change points in time series are corrected using Adapted Caussinus-Mestre Algorithm for homogenizing Networks of Temperature series algorithm. Mann–Kendall test and Sen’s slope are used to estimate the trend and its magnitude at dry, wet and annual season time scales, respectively. Preliminary results show an increasing trend of the observed variables. There is a latitudinal increase (decrease) in the basin temperature (precipitation) from lower to higher latitudes. The minimum temperature (0.05°C/year) increases faster than the maximum temperature (0.03°C/ year). Overall, the percentage changes in minimum temperature range between 3 and 10% while that of maximum temperature ranges between 1 and 3%. Due to precipitation dependence on regional characteristics, the highest percentage change was recorded in precipitation with values between 5 and 97%. In all time scales, river discharge and precipitation have strong positive correlations while the correlation between river discharge and temperature is negative. It is imperative to advocate and support positive developmental practices as well as establishing necessary mitigation measures to cope with the effects of climate in the basin.

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Analysis of hydrometeorological variables over the transboundary komadugu-yobe basin, West Africa

Abstract

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Research Keywords

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