Browsing by Author "W O Wan Maznah"

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    Identification of Critical Erosion Prone Areas in Temengor Reservoir Basin using Universal Soil Loss Equation (USLE) and Geographic Information System (GIS)
    (IOP Publishing, 2019) E Mohammad Basri; O Mohamad Adam; S Y The; W O Wan Maznah
    In this study, the Geographic Information System (GIS) was integrated with the Universal Soil Loss Equation (USLE) model to identify the risk of erosion at 360,000 ha in the Temengor Reservoir Basin. GIS was utilized as a tool for generating, manipulating and spatializing data from government agencies for sediment yield modelling and offering spatial input data to the erosion model. Meanwhile, USLE was used to predict the spatial distribution of the sediment yield on the grid basis. The five main parameters used in this study were the rainfall erosivity factor (R), topographic factor (LS), soil erodibility factor (K), crop management factor (C) and practice support factor (P).
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    Water Quality Assessment of Bukit Merah Reservoir, Malaysia using Mathematical Modeling
    (IOP Publishing, 2020) M Z Mokhtar; M S Sofiana; W O Wan Maznah; S Y Teh
    A study focuses on the determination of the current water quality status of the reservoir was conducted in November 2018 and February 2019 as a representative for the wet and dry season, respectively, in order to assist the prediction of the water quality in BMR and its impact towards the ecosystem. Five sampling stations were chosen to provide a general overview of physico-chemical profile in BMR. Physico-chemical parameters (i.e.: temperature, dissolved oxygen, conductivity, total dissolved solids, pH, and water transparency) were measured in situ whereas in the laboratory, total suspended solids, chlorophyll-a, and nutrient analysis were done in accordance to APHA (2005). The concentration of dissolved oxygen (DO) and biological oxygen demand (BOD) were simulated in a graph using Water Quality Analysis Simulation Program (WASP).
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    Water Quality Characteristics and Modeling of Tasik Aman, USM, Penang
    (IOP Publishing, 2021) Z M Munirah; K B Muhammad Izzat Emir; W O Wan Maznah; S Y Teh; A H Ismail; M B Eshak
    A study was carried out in December 2019, focusing on the current water quality determination of Tasik Aman, to predict the future water quality condition of the lake. Four sites were designated to conduct water quality analysis comprising of water temperature, dissolved oxygen (DO), pH, transparency, biological oxygen demand (BOD), total dissolved solids, total suspended solids, conductivity, orthophosphate, chlorophyll-a, total phosphorus, ammonia, nitrite, and nitrate. Some physico-chemical parameters were measured insitu while some were measured in the lab by analyzing the water samples collected in the field in accordance with APHA (2005). DO and BOD data were modeled using Water Quality Analysis Simulation Program (WASP).