Othman Jaafar
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View article: Assessment of Treated Sewage Effluent as an Alternative Clean Water Source for Car Wash Applications
Assessment of Treated Sewage Effluent as an Alternative Clean Water Source for Car Wash Applications Open
Sewage treatment is a critical process for ensuring that wastewater is treated to meet regulatory discharge standards. However, further polishing of the treated effluent is often required for applications such as vehicle washing, where wat…
View article: A Comparative Flood Frequency Analysis of High-Flow between Annual Maximum and Partial Duration Series at Sungai Langat Basin
A Comparative Flood Frequency Analysis of High-Flow between Annual Maximum and Partial Duration Series at Sungai Langat Basin Open
Flood frequency analysis should consider small and frequent floods. Despite the complexities in partial duration series implementation, it can give a better flood estimation in a way that it does not exclude any significant high flow event…
View article: Long Term Trend Analysis of Upstream and Middle-Stream River in Langat Basin, Malaysia
Long Term Trend Analysis of Upstream and Middle-Stream River in Langat Basin, Malaysia Open
The present study investigates the trend in long term monthly streamflow of Sungai Lui (upstream) and Sungai Kajang (middle-stream) of the Sungai Langat Basin located in Selangor, Malaysia. The Mann-Kendall (MK) and Innovative Trend Method…
View article: Hybrid Support Vector Regression Model and K-Fold Cross Validation for Water Quality Index Prediction in Langat River, Malaysia
Hybrid Support Vector Regression Model and K-Fold Cross Validation for Water Quality Index Prediction in Langat River, Malaysia Open
Water quality analysis is an important step in water resources management and needs to be managed efficiently to control any pollution that may affect the ecosystem and to ensure the environmental standards are being met. The development o…
View article: Trend and Linearity Analysis of Meteorological Parameters in Peninsular Malaysia
Trend and Linearity Analysis of Meteorological Parameters in Peninsular Malaysia Open
Climate change has often led to severe impact on the environment. This study aimed to investigate the monthly trends and linearity of meteorological parameters at four locations during the period from 1970 to 2016. These locations represen…
View article: Analysis of Trend and Change Point Detection at Kajang Station, Malaysia
Analysis of Trend and Change Point Detection at Kajang Station, Malaysia Open
Land use and land cover change gives significant impact on changes in surface runoff, flood frequency, baseflow and also average yearly discharge.This study attempts to analyze trend by using non-parametric tests namely Mann-Kendall test a…
View article: Imputation methods for recovering streamflow observation: A methodological review
Imputation methods for recovering streamflow observation: A methodological review Open
Missing value in hydrological studies is an unexceptional riddle that has long been discussed by researchers. There are various patterns and mechanisms of “missingness” that can occur and this may have an impact on how the researcher shoul…
View article: L-Moment-Based Frequency Analysis of High-Flow at the Sungai Langat, Kajang, Selangor, Malaysia
L-Moment-Based Frequency Analysis of High-Flow at the Sungai Langat, Kajang, Selangor, Malaysia Open
Annual maximum daily streamflow data were used to examine flood frequency for Sungai Langat in Kajang, Selangor, Malaysia. The objectives of this study were to identify the best fit probability distribution to the streamflow data and estim…
View article: Selection of Impactful Environmental Parameters Using an Integrated Community Feedback System for Environmental Assessment
Selection of Impactful Environmental Parameters Using an Integrated Community Feedback System for Environmental Assessment Open
Environmental assessment (EA) of metropolitan areas is an appropriate method for evaluating civil and environmental engineering problems. Assessing and identifying the environmental pollution in metropolitan areas is of crucial interest, a…
View article: Auditing Road Maintenance Work Using Unmanned Aerial Vehicle
Auditing Road Maintenance Work Using Unmanned Aerial Vehicle Open
Road maintenance works performed by contractors require validation upon completion. Conventional methods are typically chosen to validate the works. Geographic Information System (GIS) is applied in this study to produce accurate data such…
View article: Impact of Shoreline Changes to the Coastal Development
Impact of Shoreline Changes to the Coastal Development Open
The coast zone is one of the most fragile area in Malaysia and can be affected easily due to environmental threats. This study mainly focuses on analysis impact of shoreline changes on coastal development using Geographical Information Sys…
View article: Effect of rainfall infiltration into unsaturated soil using soil column
Effect of rainfall infiltration into unsaturated soil using soil column Open
Rainfall especially in tropical region caused infiltration to the soil slope. The infiltration may change pore water pressure or matric suction of the soil. The event of rainfall infiltration into soil is a complex mechanism. Therefore, th…
View article: Daily Suspended Sediment Discharge Prediction Using Multiple Linear Regression and Artificial Neural Network
Daily Suspended Sediment Discharge Prediction Using Multiple Linear Regression and Artificial Neural Network Open
Prediction of suspended sediment discharge in a catchments area is very important because it can be used to evaluation the erosion hazard, management of its water resources, water quality, hydrology project management (dams, reservoirs, an…
View article: Volumetric calculation using low cost unmanned aerial vehicle (UAV) approach
Volumetric calculation using low cost unmanned aerial vehicle (UAV) approach Open
Unmanned Aerial Vehicles (UAV) technology has evolved dramatically in the 21st century. It is used by both military and general public for recreational purposes and mapping work. Operating cost for UAV is much cheaper compared to that of n…
View article: Identifying the Monotonic Trend in Climate Change Parameter in Kluang and Senai, Johor, Malaysia
Identifying the Monotonic Trend in Climate Change Parameter in Kluang and Senai, Johor, Malaysia Open
Presently, climate change plays an important role as it gives a serious impact to the living things on earth.Analyzing the trend of climate change is very important in identifying the pattern of changes because it can give an initial overv…
View article: Temporal Analysis of Water Quality in The Straits of Johor
Temporal Analysis of Water Quality in The Straits of Johor Open
Temporal analysis is used to obtain changes in water quality along the Straits of Johor.Boxplot is used to show graphically on the temporal pattern of yearly and monthly temperature, conductivity, pH, dissolved oxygen (DO), total suspended…
View article: Extraction of shoreline changes in Selangor coastal area using GIS and remote sensing techniques
Extraction of shoreline changes in Selangor coastal area using GIS and remote sensing techniques Open
Nowadays, coastal zones are facing shoreline changes that stemming from natural and anthropogenic effect. The process of erosion and accretion will affect the physical environment of the shoreline. Therefore, the study of shoreline changes…
View article: A REVIEW ON SEWAGE TREATMENT AND POLISHING USING MOVING BED BIOREACTOR (MBBR)
A REVIEW ON SEWAGE TREATMENT AND POLISHING USING MOVING BED BIOREACTOR (MBBR) Open
Effluent treatment and polishing using moving bed bioreactors (MBBRs) are advanced technique in biological treatment operations become increasing widely and popular use all over the world to treat various types of effluents with very diffe…