Lariyah Mohd Sidek

Universiti Tenaga Nasional (UNITEN) | uniten · Department of Civil Engineering

Extensive hydrological analysis is carried out to estimate floods for the Batu Dam, a hydropower dam located in the urban area upstream of Kuala Lumpur, Malaysia. The study demonstrates the operational state and reliability of the dam structure based on hydrologic assessment of the dam. The surrounding area is affected by heavy rainfall and climate...

Recently, there has been increased interest in using optimization techniques to find the optimal operation for reservoirs by applying them to various aspects of the reservoir operating system, such as finding the optimal rule curves for reservoirs. The use of different algorithms (artificial bee colony (ABC), particle swarm optimization (PSO), gene...

The dam related disaster caused thousands of people's lives and billions of property damages in the world and in Malaysia. The loss of life and property damages is mostly happened due to dam failure and the lack of timely evacuation procedures. Currently, insufficient integrated and comprehensive research are being done in Malaysia, including the i...

Sediment-related disaster is one of the most significant natural disasters, from the perspective of magnitude, damage and loss to human life and infrastructure, and disruption to socio-economic activities. Debris, mud flood, landslide and cliff failure are the major catastrophic problems commonly experienced in most developing countries, including...

The tsunami is one of the deadliest natural disasters, responsible for more than 260,000 deaths and billions in economic losses over the last two decades. The footage of the devastating power of the 2004 Indian Ocean tsunami perhaps remains vivid in the memory of most survivors, and Malaysia was one of the countries affected by the unprecedented 20...

Dams that are not designed to withstand major storms may be destroyed and increase the flood damage opportunities downstream. For protecting the lives and land downstream of Cameron Highlands, Malaysia, the current research targeted to estimate the Probable Maximum Precipitation based on the updated rainfall and other meteorological data and predic...

Critical infrastructure systems consist of physical and cyber assets that are essential to the operation of the economy and the government. As one of the most important critical infrastructures worldwide, the water sector has become vulnerable to new risks in the form of cyber threats that can severely impact public health, and are difficult to det...

Trend analysis of historical and future climatic precipitation was investigated in the Kelantan River Basin over the past (1985–2016) and future periods (2020-2050) under RCP4.5 and RCP8.5 scenarios. The Mann-Whitney test was adopted to compare the variations of the historical and projected precipitation data. The Mann-Kendall test and Sen slope we...

The increases in extreme rainfall could increase the probable maximum food (PMF) and pose a severe threat to the critical hydraulic infrastructure such as dams and food protection structures. This study is conducted to assess the impact of climate change on PMF in a tropical catchment. Climate and infow data of the Tenmengor reservoir, located in t...

The fisheries industry of Malaysia is known as the strategic sector that can help the country raise domestic food production and supply. This research proposed machine learning (ML) based prediction of marine fish landings to project fish supply and compare those projections with the observed data. Three ML models, i.e., linear regression (LR), dec...

The optimization of the operation of reservoirs is one of the complex problems in terms of non-linear problems, large numbers of decision variables, and multiple constraints that are difficult to simulate and find solutions to. Researchers have tested several metaheuristics algorithms (MHAs) in the field of water resources and use them to optimize...

Impact-based forecasting (IBF) is a relatively new concept to implement in Malaysia. The catastrophic effects of natural disasters such as floods can be minimized if an early forecasting system is being developed. Also, by using the IBF concept, people can forecast the devastating impact of natural disasters such as flood, which is very prone to ha...

Large areas of Malaysia repeatedly suffer from prolonged, significant floods and in past, several flood-related disasters happened due to heavy rainfall in the Golok River Basin at the Kelantan state of Malaysia. Therefore, in this research, the hydrological analysis is being conducted in that area and five extreme flood disasters are chosen for va...

Sediment related disaster is the most significant natural disaster in Malaysia and many countries in this world from the perspective of magnitude, damage and loss to human life and infrastructure as well as disruption to socio-economic activities. Debris, mud flood, landslide and cliff failure are some of the major catastrophic problems and became...

Theories of dam construction that were created eventually laid the groundwork for dam safety, allowing for the design of higher-quality dams to be built. Dam engineers continued to experiment with new technology to build dams in a safer, more cost-effective, and environmentally friendly manner. The Discrete Particle Method (DPM) is commonly used in...

The increases in extreme rainfall could increase the probable maximum food (PMF) and pose a severe threat to the critical hydraulic infrastructure such as dams and food protection structures. This study is conducted to assess the impact of climate change on PMF in a tropical catchment. Climate and infow data of the Tenmengor reservoir, located in...

The agricultural sector is one of the most important sources of CO2 emissions. Thus, the current study predicted CO2 emissions based on data from the agricultural sectors of 25 provinces in Iran. The gross domestic product (GDP), the square of the GDP (GDP2), energy use, and income inequality (Gini index) were used as the inputs. The study used sup...

One of foremost issue arise in the dam management and dam reliability assessment is the sedimentation of suspended particles. Sedimentation affected the energy production and efficiency, storage, discharge capacity, and flood attenuation capabilities. In this paper, the sediment transport and scouring in the dam spillway structure was modelled usin...

Coupled with climate change, the urbanization-driven increase in the frequency and intensity of floods can be seen in both developing and developed countries, and Malaysia is no exemption. As part of flood hazard mitigation, this study aimed to simulate the urban flood scenarios in Malaysia’s urbanized catchments. The flood simulation was performed...

Climate change causes more frequent and intense rainfall events, leading to severe erosion in the catchment and sediment transferred into rivers and reservoirs. This study focus on long term sediment load in major rivers in Cameron Highlands and prediction of annual sediment inflow into Ringlet Reservoir from 2000 to 2030. Soil Water Assessment Too...

Accurate prediction of water level (WL) is essential for the optimal management of different water resource projects. The development of a reliable model for WL prediction remains a challenging task in water resources management. In this study, novel hybrid models, namely, Generalized Structure-Group Method of Data Handling (GS-GMDH) and Adaptive N...

Malaysia, being a tropical country located near the equatorial doldrums, experiences the annual occurrence of flood hazards due to monsoon rainfalls and urban development. In recent years, environmental policies in the country have shifted towards sustainable flood risk management. As part of the development of flood forecasting and warning systems...

High-level architecture (HLA) and Distributed Interactive Simulation (DIS) are commonly used for the distributed system. However, HLA suffers from a resource allocation problem and to solve this issue, optimization of load balancing is required. Efficient load balancing can minimize the simulation time of HLA and this optimization can be done using...

The fishing industry is identified as a strategic sector to raise domestic protein production and supply in Malaysia. Global changes in climatic variables have impacted and continue to impact marine fish and aquaculture production, where machine learning (ML) methods are yet to be extensively used to study aquatic systems in Malaysia. ML-based algo...

The formation of vortex and swirling in any flow structures of the hydropower dam is undesirable, as it reduced the performance of turbine as well as lowered the efficiency of hydroelectric power generation. Furthermore, it could lead to the hydraulic losses at the entrance of power intakes, the blockage at the trash racks due to entrain debris and...

Constructed wetland is commonly used as a practice to reduce non-point source pollutants and as a stormwater treatment system. For many years, the evaluation of water quality assessment for the constructed wetland is using normal sampling and laboratory work. However, in line with the technology expansion, the prediction for water quality using mod...

A smart home inhabitant performs a unique pattern or sequence of tasks repeatedly. Thus, a machine learning approach will be required to build an intelligent network of home appliances, and the algorithm should respond quickly to execute the decision. This study proposes a decision tree-based machine learning approach for predicting the activities...

At the heart of every critical national infrastructure, there is a SCADA system. The wide range of supported applications has made this life-saving management system the key element of every industrial control infrastructure in various sectors. The complexity and sophistication of SCADA systems have been increased dramatically over the last few yea...

Increased extreme rainfall due to climate change will increase the probable maximum flood (PMF) and pose a severe threat the critical hydraulic infrastructure like hydroelectric and flood protection dams. As the rainfall extremes in tropical regions are highly sensitive to global warming, increase PMF can be much higher in the tropics. A study has...

Impact-based forecasting and warning services aim to bridge the gap between producers and users of warning information by connecting and increasing synergies between the components of effective early warning systems. In this research, we proposed an automated warning message based on colour codes to trigger risk mitigation actions at the local leve...

Dams play a vital role in our modern life but it may fail in any undesirable situation and have a disastrous effect on society, economy and environment. As most of the dams in Malaysia undergo aging factors, the integrity of dams should be examined. This research assesses the flood impact analysis on direct damages and loss of life (LOL) for the Pe...

SCADA systems are commonly used to track and manage utilities in vital national infrastructures including electricity generation and delivery, transportation networks, water supply and manufacturing, and manufacturing facilities. Cyber-attacks that threaten data privacy in SCADA networks, such as unauthorised misuse of sensor or control signals, ma...

This study assesses the structural analysis on the sector gate in dam spillway with 5 m gap opening. The parameters determined on this study are equivalent stress and total deformation. The structure analysis on the spillway structure is due to the impact of water discharge. Computational fluid dynamic (CFD) modelling is applied to assess the water...

Comparator is a key component in energy-efficient applications such as memory-sensing, radiofrequency identification (RFID), analog-to-digital converter (ADC), etc. Among different types of comparator circuits, the preamplifier-based design is lack of increasing the power consumption due to large current. Moreover, dynamic latch comparators can pro...

Reservoir sedimentation is one of the most common lakes and reservoirs degradation. With land use change and more development in the catchment area, soil loss becomes more imminent causing more sediment yield into the reservoir. With this uprising trend, it is important to predict sediment yield using soil loss (RUSLE) and sediment delivery ratio (...

Sedimentation issue is becoming an emerging challenge in hydropower dam due to land use changes and frequent heavy storm in the recent decades. This study carried out an assessment on sedimentation problem in Kenyir hydropower reservoir in Malaysia based on hydrological, land use, topographic, soil erosion and dam capacity data. The results showed...

Sedimentation is considered as one of the major deterioration of a lake or reservoir, resulted from the sediment yield process in the catchment. To control reservoir sedimentation, the most effective method is to control sediment production at sources. This studyis initiated to determine reservoir sedimentation using Soil and Water Assessment Tool...

A high-voltage generator (HVG) is an essential part of a radio frequency identification electrically erasable programmable read-only memory (RFID–EEPROM). An HVG circuit is used to generate a regulated output voltage that is higher than the power supply voltage. However, the performance of the HVG is affected owing to the high-power dissipation, hi...

Over recent years, there has been a rise in the number of students completing nursery education in Bangladesh. However, in order to achieve a sustainable education goal, the dropout rate in education needs to be reduced. Therefore, this research worked on providing insights that would help to understand the possible causes of dropout from education...

Surpassing a dam shape can bring about harm to the dam divider or projections through breaking. Those mistakes can result in the marvelous danger of biting the earth toll, sudden cost of redoing the dam, the pace of the more flood hurt downstream and charge to the network due to the flight of a water supply. Gigantic precipitation and its antagonis...

There are several flood event recorded within the Kajang Town in recent years especially in 2008, 2011 and 2012. Intense development of housing and commercial activities mainly concentrated within Kajang town in these recent years adjoined with its flood plain location contributed to Kajang town and its surrounding areas being prone to flooding iss...

Evapotranspiration is a significant variable of a watershed hydrological and water quality processes for surface and subsurface modelling in a basin scale. Most of the calibration and validation hydrological parameters rely on streamflow discharge. Inaccuracy calculation of the PET could disturb all the simulation processes. Hence, this study aimed...

Among various dams owned by Tenaga Nasional Berhad (TNB) Malaysia, some were constructed in the early 1930s. Hence, these dams might be affected by severe storms after completion. Climate change affects the availability and distribution of water resources in space and time and the frequency of extreme rainfall events (PMP). Moreover, the probable m...

2 Dimensional (2D) flow modeling is widely used for flood plain analysis and is considered to be a viable tool for evaluating flood propagation. The accuracy of open channel hydraulics and flood plain model is dependent on the refinement of model mesh or grid to represent ground model topography using high-resolution Light Detection and Ranging (Li...

The development of dams and reservoirs in Malaysia are very much dependent on its water resources for diverse human activities such as agriculture, industries, settlements, hydro-electric power and any human needs. The development of dams can be associated with the number of effects including the changes to hydrology, water quality and river morpho...

Detention of water by large barriers in dams creates lakes and reservoir. However, huge amount of water stored behind the dam can possess adverse effects to the downstream during the event of dam break. It is very much essential for executing dam break study as to provide possible flood inundation information and impact assessment to the dam. This...

The efficient and effective management of hydropower reservoirs is vital for hydroelectric power plant operation. Therefore, accurate and reliable flow forecasting forms an important basis for efficient real-time hydropower reservoir operation. The inflow forecast modeling process involves various computations and modeling techniques, which results...

Reservoir sedimentation is common in lakes and reservoirs. Heavy sedimentation is observed in reservoirs in Cameron Highlands and the trends are uprising in other lakes or reservoirs in Malaysia. Mitigation measures that can be undertaken by the reservoir managers are limited within the reservoir. Pollutant control at sources is difficult to be imp...

The recent flood event that occurred in 2014 had caused disaster in Perak and Sungai Perak is the main river of Perak which is a major natural drainage system within the state. The aim of this paper is to determine the flow duration curve for downstream of Sungai Perak using minimum and maximum flow. The flow-duration curve describes the variabilit...

Dams are large barriers built across rivers and streams in order to restrain and utilize the flow of water for numerous purposes like irrigation, generation of hydroelectricity and controlling the flood. Detention of water by large barriers creates lakes and reservoirs. However, a huge amount of water stored behind the dam can possess adverse effec...

Flood forecasting based on the distributed model is becoming popular in Malaysia. It is one of the methods to reduce flood risk when a structural measure is very expensive to implement. Two main outputs from the forecasting model are the timing of the flood wave to arrive in the area of interest and the magnitude of the flood. However, another fact...

Large-scale development in the upstream area has a catastrophic impact on soil erosion on the surrounding community and property in Cameron Highland. The massive land-use activities give a negative impact if inadequate protection of assets cannot be controlled which led the sedimentation issue to each reservoir in Cameron Highland. Therefore, this...

The inflow forecasting system is an essential tool to assist dam owners in decision making and planning. Effective and optimized hydropower reservoir operation, monitor and forecast inflows and lake level to provide benefits in maximizing energy revenue, while taking into account dam safety risks. The Temengor Inflow Forecasting System for Temengor...

Probable Maximum Flood is considered as one of the most applied inflow design floods in the determination of dam structure adequacy in current practices. This study revised the inflow design flood values for Sungai Perak Hydroelectric Scheme using Probable Maximum Flood estimation. Probable Maximum Precipitation is analyzed for the catchment and th...

A pre-release strategy is developed in this research for Sg. Perak hydroelectricity scheme which consists of four cascading dams. To handle the extreme inflow, the pre-release methodology helps the dams to provide services in safe manners. Probable maximum precipitation (PMP) is applied to revise the estimation of reservoir intake of all four dams....

In all prospect likely probable maximum precipitation (PMP) is the significant thing parameter used to assess the probable maximum flood (PMF), the two of which may be basic for dam assurance and structural building capacities. The World Meteorological Organization (WMO) characterizes PMP in light of the fact that the best power of precipitation fo...

Flooding has become one of the most rapidly growing types of natural disasters that have spread around the globe. In December 2014, 21 fatalities cases have been recorded and more than 200,000 people have been evacuated in Malaysia due to flood. Tenaga Nasional Berhad (TNB) has provided the structure mitigation for their substations after their ass...

The water quality in the rivers of Malaysia is slowly deteriorating, often, high turbid water intake in water treatment plant causes overloading thus raising water treatment cost. Therefore, this study will provide an insight into the application of acid-treated diatomite in treating turbid river water in Malaysia. The objective of this study is to...

There are 104 dams in Malaysia for various functions and some of these dams have been built for more than 50 years ago. Among them, about 41 dams are classified as high-risk dams. Although, there are no dam failure cases in Malaysia reported dam failures to continue to occur worldwide and it is accepted a practice that dams must have an Emergency A...

This book presents peer-reviewed articles from the 1st International Conference on Dam Safety Management and Engineering (ICDSME 2019), organized by the Malaysian National Committee on Large Dams (MYCOLD), Tenaga Nasional Berhad (TNB), Department of Irrigation and Drainage (DID) and Universiti Tenaga Nasional (UNITEN). With the theme “resilient dam...

National River Water Plants are located along upper Klang and Gombak river catchment to purify the polluted river using direct contact methods. As the current water quality situation in the study area is poor due to the contribution of anthropogenic activities on the water quality degradation in these urban rivers, the investigation was performed u...

Range of sensitive parameter value associated with uncertainty should be performed in the calibration and validation process to establish more accurate watershed hydrological models. Evapotranspiration is one of the most dominant in a hydrological cycle other than surface runoff and subsurface processes. This research aims at an in-depth understand...

The slope failure risk assessment of a particular area can be prepared by considering the data available. Many attempts have been made to classify the risk where evaluations are made in rating or in grading the slopes based on their characteristics and erosion problems. The assessments were done for geo-hazard such as erosion and landslide recogniz...

For many years, lands in Cameron Highland have been opened and leveled for agricultural farming and intensive crop production. Land-disturbing activities such as agricultural operations that are conducted on regions with steep slopes leads to a high potential of soil erosion, sedimentation and landslide occurrences. As a results, this phenomenon pr...

One of the main ecotourism areas in Malaysia is Cameron Highlands and due to illegal farming and uncontrolled logging, the rivers are being polluted. The main problems lie in Cameron Highlands included stormwater management, water quantity and water quality issues, sedimentation problem, mud flood as well as erosion and landslide occurrence. Theref...

Reducing power dissipation of any circuit can make that circuit more energy-efficient and at the same time promise stability. Recent researchers mainly focus on controlling and monitoring low power designs for different low power applications, wireless systems such as radio frequency identification (RFID) transponder. Therefore, generating an inter...

This work was conducted at hilly farms of Cameron Highlands to model the incidences of soil erosion and landslides using historical data and field observations. IfSAR data with spatial resolution of 5 m was used which enable clear observation and delineation of the geographic features within the study area. Field visits were conducted to various pl...

Particle swarm optimization (PSO) is a very well-known method and has a strong background in optimization filed to solve different nonlinear, complex problems especially in creating the reservoir release policies. This research modified the particle updating process of the standard PSO algorithm by including the passive congregation (PC) theory. Th...

The aim of this paper is to explore the information and analyze the performance of bio ball and spawning brush media in order to compare the findings of the performance of both biomedia by using Monod Model Equation. The integrated fixed film activated sludge (IFAS) process uses aeration and biomedia of spawning brush and bio ball which are placed...

Water quality monitoring is indispensable for the development of society and health. Water quality can be determined either by individual parameter of any specific interest or by selected a few important parameters to assess the overall quality. A study was conducted at one of hydropower dam station in Malaysia to identified the pattern of water qu...