Browsing by Author "Bamutaze,Yazidhi"

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    Assessment of hydropedological characteristics at medium-sized landslide sites in Manafwa catchment, Mount Elgon, Uganda
    (Taylor and Francis, 2024-05-17) Kutosi,Moses; Bamutaze,Yazidhi; Nakileza,Bob.R; Kisira, Yeeko; Gabiri,Geofrey
    Though strongly linked to landslides, hydropedological characteristics are inadequately investigated in Manafwa catchment. This study investigated hydropedological characteristics at medium landslide sites in Manafwa catchment. The design included 12 infiltration experiments that were conducted at each site. To determine the selected soil physical properties, composite soil samples were extracted from the infiltration sites for soil laboratory analysis. Soil cores were extracted to determine saturated hydraulic conductivity (Ksat) and bulk density. The observed high infiltration rates and rapid Ksat underscore the susceptibility of the studied sites to landslide hazards. Additionally, soil organic matter, clay content, and bulk density further contribute to the understanding of the hydropedological factors influencing land slide occurrences. These findings reveal the need for comprehensive investigations into hydropedologi cal characteristics of other landslide categories to assist in landslide risk assessment and management strategies
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    Variabilities and Trends of Rainfall, Temperature, and River Flow in Sipi Sub-Catchment on the Slopes of Mt. Elgon, Uganda
    (water, 2021-06-30) Luwa,Justine Kilama; Majaliwa,Jackson Gilbert Mwajalolo; Bamutaze,Yazidhi; Kabenge,Isa Pilesjo; Oriangi, George; Mukengere,Espoir Bagula
    The variabilities in rainfall and temperature in a catchment affect water availability and sustainability. This study assessed the variabilities in rainfall and temperature (1981–2015) and river flow (1998–2015) in the Sipi sub-catchment on annual and seasonal scales. Observed daily rainfall and temperature data for Buginyanya and Kapchorwa weather stations were obtained from the Uganda National Meteorological Authority (UNMA), while the daily river-flow data for Sipi were obtained from the Ministry of Water and Environment (MWE). The study used descriptive statistics, the Standardised Precipitation Index (SPI), Mann Kendall trend analysis, and Sen’s slope estimator. Results indicate a high coefficient of variation (CV) (CV > 30) for August, September, October, and November (ASON) seasonal rainfall, while annual rainfall had a moderate coefficient of variation (20 ˂ CV ˂ 30). The trend analysis shows that ASON minimum and mean temperatures increased at α = 0.001 and α = 0.05 levels of significance, respectively in both stations and over the entire catchment. Furthermore, the annual and March, April, and May (MAM) river increased at an α = 0.05 level of significance. A total of 14 extremely wet and dry events occurred in the sub-catchment during the post-2000 period, as compared to five in the pre-2000. The significantly increased trend of river flow could be attributed to the impacts of climate and land-use changes. Therefore, future studies may need to quantify the impacts of future climate and land-use changes on water resources in the sub-catchment. may need to quantify the impacts of future climate and land use changes on water resources in the sub-catchment