Browsing by Author "Abdul Hafidz Yusoff"

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    Erosion and Sedimentation at Headwater Stream: A Case Study for Pergau Water Intake
    (IOP Publishing, 2020) Mohd Sofiyan Sulaiman; Mohamad Faiz Mohd Amin; Abdul Hafidz Yusoff; Mohd Fikri Samsudin; Aisah Md Shukor
    Due to strategic location for water intake facilities, a study was carried out to determine the extent of erosion and sedimentation process at Pergau water intakes that conveyed water into Pergau Lake. Three specific aims were formulated: Soil loss determination at catchment scale, sediment load determination at reach scale and river bank stability and toe erosion near the intake facility. A desktop study using remote sensing and GIS tools was executed to determine the extent of soil loss at catchment scale. The sediment load and river bank stability were measured in the field using wading technique.
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    Natural uranium and thorium isotopes in sediment cores off Malaysian ports
    (Springer, 2015) Abdul Hafidz Yusoff; Asnor Azrin Sabuti; Che Abd Rahim Mohamed
    Sediment cores collected from three Malaysian marine ports, namely, Kota Kinabalu, Labuan and Klang were analyzed to determine the radioactivities of 234U, 238U, 230Th, 232Th and total organic carbon (TOC) content. The objectives of this study were to determine the factors that control the activity of uranium isotopes and identify the possible origin of uranium and thorium in these areas.