This paper presents the results of experimental and numerical investigation interactions between surface flood flow in urban areas below ground drainage systems (sewer pipes manholes). An rig has been set up at Water Engineering Laboratory University Sheffield. It consists a full scale gully structure with inlet grating, which connects 8 m(2) area pipe underneath that can function as an outfall is also further connected to tank so it come under surcharging conditions cause outflow from...

Flooding is the main recurring natural disaster in Sungai Pinang catchment, Malaysia. Flash flood susceptibility mapping (FFSM) explains a key component of risk analysis and enables efficient estimation spatial extent characteristics. The current study applied four machine learning models (i.e. Logistic Regression (LR), K-Nearest Neighbors (KNN), Random Forest (RF), Extreme Gradient Boosting (XGBoost)) ensembled with Statistical Index (SI) to develop flash (FFSM). 110 locations catchment...

Flash flood are natural disasters that frequently occur in Malaysia especially urban areas. Due to this, the development of flash susceptibility mapping one tools used aid local authority reducing and managing impact. Frequency Ratio (FR) is a popular method predictive modeling because its capabilities determine critical conditioning factor flood. The aim this research was compare standalone FR with Ensemble FR-AHP. This ensemble uses pair-wise comparison between Analytical Hierarchy Process...

Traffic loads, environmental and aging process, erosion settlement of road shoulders, overlaid carriageways, are some the possible causes vertical depression (occur unintentionally) grated inlets. Presently, no studies have been conducted to establish effects on efficiency inlets in Malaysia. This study attempts improve understanding impact hydraulic characteristics gully grates. It also empirical equations describing relationship relevant parameters, such as Froude number. A full scaled...

Assessment of total sediment load equations on selected Malaysia rivers was done based 35 loads and hydraulic data. Four were to make this assessment which are Sungai Perak, Kemaman, Pergau Kurau. These can be divided into three categories the river width, with Perak (300-350m) Kemaman (150-200m) categorised as big rivers, meanwhile, (30-45m) Kurau (10-11m) medium small respectively. The used in Ackers-White, Brownlie, Engelund-Hansen, Graf, Molinas-Wu, Karim-Kennedy Yang. This paper also...

Particle size is the most important parameter to deal in sediment transport processes. This determine class of river. It also for selection site sand mining operation through determination sediment, capacity and replenishment rate. Data were obtained observations made from two rivers namely Sungai Perak Kurau Malaysia. The categorized as wide river small Kurau. For Perak, width ranges 248.18 338.53 meter whilst 9 11 meter. covers flow discharges 130.988 m3/s 435.915 2.52 4.723 Based on...

Flash floods are one type of natural disaster that frequently occurs in Malaysia, especially urban areas. This paper’s objective is to develop the flash flood susceptibility mapping (FFSM) using weight evidence (WOE) Sungai Pinang catchment. The catchment located highly urbanised areas Georgetown. FFSM was developed six conditioning factors: elevation, slope, rainfall, land cover, distance from river, and lithology. study showed WOE method capable producing high accuracy, with a success rate...

Concepts of evolution theory (by Herbert Spencer) were analyzed using a Geographic Information System according to living notions in the context an urban city. The idea was applied society within Balad city find out whether concepts contrast, integration, specialization, and exclusivity on which is based have impact services effect structure social elements stages its development. research problem centered shortcomings predicting explaining morphological functional city, while main objective...

Abstract. It is difficult to define the hydrologic and hydraulic characteristics of rain for research purposes, especially when trying replicate natural rainfall using artificial on a small laboratory scale model. The aim this paper was use drip-type simulator design, build, calibrate, run simulated rainfall. Rainfall intensities 40, 60 80 mm/h were used represent heavy events 1-hour duration. Flour pellet methods obtain drop size distribution results show that average all investigated...

Abstract This paper describes the water quality study which was carried out at five (5) sampling sites along Sg. Perak and Kinta respectively. The objective of to examine chemical, physical biological characteristics river determine level classification each site based on Water Quality Index (WQI) National Standards (NWQS). samples from were subjected in-situ laboratory analyses focused six (6) important parameters WQI are Dissolved Oxygen (DO), Biochemical Demand (BOD5), Chemical (COD),...

Purpose In this study, new hybrid polymers composed of Zinc chloride (ZnCl 2 ), acrylamide and chitosan were prepared at different ratios temperatures. The effects pH polymer dosage examined for to observe their efficiency in the removal turbid water. polymers’ zeta potential, morphology, elemental composition functional groups also identified studied. Design/methodology/approach free-radical polymerisation process was executed presence N, N’-Methylene bis-acrylamide potassium persulphate...