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Analysis of hydrometeorological variables over the transboundary Komadugu-Yobe basin, West Africa

Adeyeri, O. E. 1; Laux, P. 1; Lawin, A. E.; Ige, S. O.; Kunstmann, H. 1
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU), Karlsruher Institut für Technologie (KIT)


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. ... mehr

DOI: 10.2166/WCC.2019.283
Zitationen: 11
Web of Science
Zitationen: 10
Zitationen: 14
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 01.12.2019
Sprache Englisch
Identifikator ISSN: 2040-2244, 2408-9354
KITopen-ID: 1000098630
HGF-Programm 12.02.03 (POF III, LK 01) Regional Climate-and Water Cycle Variab.
Erschienen in Journal of water and climate change
Verlag IWA Publishing
Band 11
Heft 4
Seiten 1339–1354
Vorab online veröffentlicht am 16.07.2019
Schlagwörter homogeneity tests in hydrometeorological variables, Komadugu-Yobe basin, Lake Chad region, return period, trends in hydrometeorological variables, wavelet
Nachgewiesen in Web of Science
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