Mohd Ridza Mohd Haniffah

Universiti Teknologi Malaysia | UTM · Department of Water and Environmental Engineering

Abundant rainfall areas promote sediment yield at both sub-watershed and watershed scale due to soil erosion and increase siltation of river channel, but it can be curtailed through planned urbanization. The urbanization of Skudai watershed is analysed from historical and future perspective. A GIS-based model (Hydrological Simulation Programme-FORT...

The response of a watershed due to changes in its physical environment might result in floods, river erosions and siltations, subsequently affecting humans and biotas. Evaluating land-use changes is crucial for better assessment of hydrological conditions in a watershed system. The remote sensing imagery, field data collection, and land change mode...

The land-use characteristics of a watershed determined the amount of pollution produced in its and can be curtailed by implementation of best management practices (BMPs) in an identified critical source area (CSA). Present and future land-use scenarios of the watershed was produced and HSPF model was used to model the hydrology and in-stream pollut...

Flow around a marine riser in water was investigated using numerical modelling. In this regime, the drag coefficient drops off at a certain Reynolds number due to a change from laminar to turbulent flow. The aim of this study is to investigate the capability of FLOW-3D, a three-dimensional computational fluid dynamic (CFD) transient solver through...

Flow separation occurs often in river diversion, particularly in branch channels. The flow separation is generally seen through its separation area, which is influenced by a number of factors such as off-take angles, discharge ratios, and channel widths. The study was conducted through computational modelling of FLOW-3D to create a relationship bet...

Citation: Mat Lazim, Z.; Salmiati, S.; Marpongahtun, M.; Arman, N.Z.; Mohd Haniffah, M.R.; Azman, S.; Yong, E.L.; Salim, M.R. Distribution of Silver (Ag) and Silver Nanoparticles (AgNPs) in Aquatic Environment. Water 2023, 15, 1349. Abstract: Nanomaterials, classified as emerging pollutants that are toxic to the environment, are known to bioaccumul...

Channel confluence and bifurcation flows are common phenomena in a natural river. Understanding the characteristics of these dividing flows can help engineers to make decisions on flood risk reductions. In this study, a numerical model has been applied for idealised Y-shaped channels in both cross-sections of rectangular and trapezoidal. InfoWorks...

Open-channel with branches makes the channel flow more complex and difficult to analyse due to the complex variables and a large number of geometric properties related to the junction. The aim of this paper is to employ the mathematical model to investigate the relationship between discharge, Froude number and bed width in the dividing open-channel...

Orifices are used as flow control and measuring devices and classified based on their sizes, shapes, and flow conditions. For partially submerged orifice, relatively few studies provide analytical results because it is highly dependent on the orifice’s geometry and the net flow head available. The purpose of this study is to determine the relations...

The shallow water equations have been widely used to simulate dam-break problem. Due to the nonlinear and discontinuous nature of the event, application of numerical methods is often plagued with problem such as oscillation and unphysical solutions. The aim of this paper is to simulate a one-dimensional dam break using an improved Discontinuous Gal...

Crack formation in concrete is inevitable. The cracks allow the penetration of harmful substances which may decrease the durability and the service life of concrete structures. Self-healing concrete is therefore emerging as an innovative construction material to tackle the cracking issues. In recent years, microbial self-healing concrete is garneri...

Background: Understanding environmental microbiomes and antibiotic resistance (AR) is hindered by over reliance on relative abundance data from next-generation sequencing. Relative data limits our ability to quantify changes in microbiomes and resistomes over space and time because sequencing depth is not considered and makes data less suitable for...

Nutrient pollution is considered as a primary factor of water quality deterioration in urban-dominated watersheds in which an informed decision on the management strategies are required to improve the water quality condition. The Hydrological Simulation Program Fortran (HSPF) model is used to evaluate the impacts of pollution by these nutrients usi...

Plates with leading-edge tubercles experience beneficially more gradual aerodynamics stalling when entering the post-stall regime. Little is known, however, about the corresponding aquatic flow responses when these tubercles-furnished plates are subjected to the maximal angle of attack, with the flow direction perpendicular to their planar area. He...

Pinpointing environmental antibiotic resistance (AR) hot spots in low-and middle-income countries (LMICs) is hindered by a lack of available and comparable AR monitoring data relevant to such settings. Addressing this problem, we performed a comprehensive spatial and seasonal assessment of water quality and AR conditions in a Malaysian river catchm...

In most practical cases, density-driven currents flow over surfaces that are not smooth; however, the effects of bottom roughness on these currents have not been fully understood yet. Hence, this study aims to examine the velocity structure of density currents while propagating over rough beds. To this end, alterations in the vertical velocity prof...

Flow around a marine riser in water at the drag crisis regime was investigated using numerical modelling. In this regime, the drag coefficient drops off at a certain Reynolds number due to a change from laminar to turbulent flow. The aim is to investigate the capability of turbulence model to predict drag coefficient through COMSOL Multiphysics, a...

Subsea cable laying is a risky and challenging operation faced by engineers, due to many uncertainties arise during the operation. In order to ensure that subsea cables are laid out diligently, the analysis of subsea cable tension during the laying operation is crucial. This study focuses on the fatigue failure of cables that will cause large hang-...

Analysis of the historical land-cover of Muar River watershed has shown that forest and agriculture are the dominant land-covers over the last three decades. This information was used to evaluate the relationship between the vegetative landscape variation to stream water quality concentrations which was to provide an insight for management of water...

Flow around a smooth cylinder was investigated by numerical modelling at subcritical Reynolds numbers ranged from 7.2 x 10^3 to 1.8 x 10^4 and compared to experimental work by previous researchers. This study aims to compare the drag force between numerical modelling to the experimental measurement with the closest condition and environment in orde...

Predicting the impact of climate change and human activities on river systems is imperative for effective management of aquatic ecosystems. Unique information can be derived that is critical to the survival of aquatic species under dynamic environmental conditions. Therefore, the response of a tropical river system under climate and land-use change...

Flood vulnerability indices for the Kelantan River sub-basins were developed from various flood-related variables. The vulnerability indices of the Kelantan River sub-basins involved flood depth-inundation area, soil erosion potential, and potential of soil for agricultural use, population vulnerability, road infrastructure vulnerability and market...

For citation: Bello A.-A.D., Hashim N.B., Haniffah R.M. 2017. Impact of urbanization on the sediment yield in tropical watershed using temporal land-use changes and a GIS-based model. Journal of Water and Land Develop-Abstract Abundant rainfall areas promote sediment yield at both sub-watershed and watershed scale due to soil erosion and increase s...

It is well-known that watershed hydrology is dependent on several factors, including land use, topography and climate condition. But the accuracy of land use information on the surface water is mostly ignored. Even though it defined the hydrology of the watershed based on the land used classes assigned from the Land use data. They are classified ba...

An understanding of extreme waves is important in the design and analysis of offshore structures, such as oil and gas platforms. With the increase of interest in the shipping of LNG, the design of import and export terminals in coastal water of slowly varying intermediate depth requires accurate analysis of steep wave shoaling. In this thesis, data...

Investigations concerning the dynamic response of composite beams with partial interaction are scarce. Derivation of the differential equations describing the interaction between composite elements normally involves with the solution of high order system of equations, which closed form solutions are difficult. This study concerns with the finite el...