Browsing by Author "Ogedengbe, K"

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    INNOVATIVE TREND ANALYSIS OF HYDRO-METEOROLOGICAL VARIABLES IN IBADAN, NIGERIA
    (university of eloued -جامعة الوادي, 2022-01-01) Ahmed, M. O; Ogedengbe, K; Lawal, N. S
    Analysis of trend in hydro-meteorological variables is extremely important for improving water resources planning and management. This study examines trend in monthly rainfall and temperature using the recently developed Innovative Trend Analysis Method (ITAM) and Mann-Kendall (M-K) with Sen’s slope test. Record of precipitation and temperature data was obtained from the International Institute of Tropical Agriculture (IITA) in Ibadan, Nigeria for the period of 1973-2018. The precipitation trend during the period of 45years has been analyzed using the ITAM and M-K test. Most of the results obtained from these two methods for detecting trend are found to be matching. The result of this study shown that precipitation for the month of February, March, April, May, June, July, August and September indicated an increasing trend with the rate of 0.01, 0.01, 0.004, 0.025, 0.063, 0.028, 0.006 and 0.061 mm / year respectively. A significant increasing trend was shown in June and September at 1% and 10% significance level. The result of temperature obtained over the study area shown that almost all the months indicated increasing trend. The month of February, April, May and November shown an increasing trend at 10% significance levelThe comparison of the ITAM and M-K methods support the reliability of ITAM. In fact, ITAM detected some trend properties which could not be observed from the M-K test. Therefore, in climate change scenarios the ITAM can be effectively used and can provide useful information for precise management and planning of water resources.
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    TREND ANALYSIS OF EVAPORATION AND SOLAR RADIATION USING INNOVATIVE TREND ANALYSIS METHOD
    (university of el oued/جامعة الوادي, 2021-05-01) Ahmed, M.O; Ogedengbe, K
    Analysis of trends in monthly evaporation and solar radiation in the face of climate change gives useful information for better planning and management of water resources. This paper examines the monthly evaporation and solar radiation trend using the recently developed innovative trend analysis method (ITAM). The monthly evaporation trend result shown that 75% of the months indicated decreasing trend with the month of February, March, August and April decreased significant at 0.1%, 10%, 10% and 5% significance level respectively. As regards solar radiation all the months indicated decreasing trend with January, July and October shown a decreasing trend at 5% significant level. By comparing the Mann-Kendall method with the ITAM the reliability of ITAM was ascertained. Hence, ITAM can be effectively utilized in climate change scenarios where useful information is needed for accurate management and planning of water resources.