Browsing by Author "Rodeano Roslee"

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    Application of Analytical Hierarchy Process (AHP) for Landslide Hazard Analysis (LHA) in Kota Kinabalu Area, Sabah, Malaysia
    (IOP Publishing, 2022) Rodeano Roslee; Kamilia Sharir; Goh Thian Lai; Norbert Simon; Lee Khai Ern; Eldawaty Madran; Ahmad Syazwan Saidin
    The AHP is defined as theory of measurement through pairwise comparisons and relies on the judgements of experts to derive priority scales that measure intangibles in relative terms. The derived priority scales are synthesised by multiplying them by the priority of their parent nodes and adding for all such nodes. Weighted value of different spatial factors from the best models calculated with the AHP method were derived.
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    Assessment of Flood Susceptibility Analysis Using Analytical Hierarchy Process (AHP) in Kota Belud Area, Sabah,Malaysia
    (IOP Publishing, 2022) Kamilia Sharir; Goh Thian Lai; Norbert Simon; Lee Khai Ern; Mustapha Abd Talip; Rodeano Roslee
    This study aims to assess the flood susceptibility analysis using a Geographical Information System (GIS) based-heuristic analysis, namely the Analytical Hierarchy Process (AHP) model. Eight relevant physical parameters have been selected, namely, drainage density, drainage proximity, elevation, slope angle, slope curvature, land use, soil type, and topography wetness index. The relative importance of these factors has been compared in the pairwise matrix to gain weight values during the process of the Analytical Hierarchy Process (AHP). The flood susceptibility zones have been mapped according to their weightage value. Finally, the flood susceptibility map was prepared and classified into six classes as very low, low, moderate, high, and very high susceptibility using the natural break classification method.
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    Earthquake Threats in Ranau-From The Sources of Mensaban and Mesilou Fault
    (IOP Publishing, 2022) Ahmad Khairut Termizi; Felix Tongkul; Noor Sheena Herayani Harith; Rodeano Roslee
    This article explains the process for doing a probabilistic seismic hazard analysis (PSHA) while taking into consideration the peak ground acceleration (PGA) on bedrock in the Ranau region for a 10% and 2% chance of exceedance. The PGA estimate values for Ranau are between 0.08g to 0.16g for PGA 10%, while for PGA 2% was between 0.15g to 0.28g. The PGA value is divided into the following five earthquake hazard classes based on a quarterly geostatistical analysis method. These are ""very low,"" ""low,"" ""medium,"" ""high,"" and ""very high"" classes.
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    Engineering Geological Assessment at Grandview Heights, Paya Terubong, Pulau Pinang, Malaysia
    (IOP Publishing, 2022) Nazlin An�Nisa Md Shah; Abdul Ghani Rafek; Ailie Sofyiana Serasa; Wan Salmi Wan Harun; Muslim Abdurrahman; Lee Khai Ern; Nguyen Xuan Huy; Tran Van Xuan; Rodeano Roslee; Mingwei Zhang; Goh Thian Lai
    Grandview Heights, Paya Terubong is an old apartment building situated on a coarse-grained biotite granitic bedrock hillside. Paya Terubong is a landslide prone area where various landslides have been reported since 1998. The granitic hill has been disturbed during construction of the apartment. Due to the possibility of future landslides, an engineering geological study was conducted to assess the stability of this rock hill beneath this apartment. The scopes of study included discontinuity surveys, geomechanical characterization of the rock mass and slope stability analysis.