Ahmad Fikri b Abdullah

Ahmad Fikri b Abdullah
Universiti Putra Malaysia | UPM · Department of Biological and Agricultural Engineering

16.69

About

31
Publications
7,995
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
263
Citations

Publications

Publications (31)
Article
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...
Article
Excessive groundwater extraction could cause environmental degradation such as surface water depletion, saltwater intrusion, and many more. Therefore, groundwater should be extracted in sustainable way to avert the harmful consequences. An accurate amount of sustainable groundwater yield can be obtained through the groundwater flow model that has l...
Article
Digital elevation models (DEMs) play an important role in producing terrain-related applications such as curvature and contour maps for planning and management of oil palm plantation. Data fusion of DEMs derived from terrestrial laser scanning (TLS) and interferometric aperture radar (IfSAR) was developed with the intention to increase the accuracy...
Article
Full-text available
Earth is faced with dramatic changes in the weather systems, which leads to climate change. Climate change affects water resources and crop production. In this study, five and seven general circulation models (GCMs) were respectively collected via the IPCC Fourth and Fifth Assessment Reports. Emission scenarios including B1, A1B, and A2 for AR4 and...
Article
Full-text available
Land suitability evaluation (LSE) is a valuable tool for land use planning in major countries of the world, including Malaysia. Previous LSE studies focused mostly on the use of biophysical and ecological datasets for the design of equally important socioeconomic variables. This study presents sub national level estimation of suitable agricultural...
Article
Full-text available
Reservoirs play a substantial role in meeting water demands in arid and semi-arid regions especially with increasing changes in global rainfall patterns. Kurau catchment located at Northwest Perak, Malaysia, is the largest source of water to Bukit Merah Reservoir. Based on climate change effects on rainfall pattern, it is important to develop a mod...
Article
Soil water dynamics under drip irrigation systems are of considerable importance in designing, managing and operating these systems. Emitter discharge, soil type, soil chemical properties, crop water-requirements, and quality of applied water are the main factors affecting soil water dynamics under drip irrigation. In this study, laboratory experim...
Conference Paper
Full-text available
Flood disasters are one of the worst natural disasters and they occur almost daily. Correspondingly, city managers are nowadays increasingly investing in data collection and modelling activities. Typically, flows in pipes and channels have been modelled using a one-dimensional (1D) approach. Also, if the flood flows on the ground are confined to st...
Article
Full-text available
Flooding is the most significant natural hazard in Malaysia in terms of population affected, frequency, flood extent, flood duration and social economic damage. Flooding causes loss of lives, injuries, property damage and leave some economic damage to the country especially when it occurs in a rural area where the main income is dependent on agricu...
Article
Objective - The optimal design, operation, and management of drip irrigation systems relies highly on a suitable combination of emitter discharge, spacing between emitters and laterals, rooting depth, soil hydraulic properties, and wetting pattern dimensions under single emitter. The wetting pattern dimensions under surface emitter can be measured...
Conference Paper
Full-text available
The dimensions of the wetted soil zone under drip irrigation systems are of considerable practical importance in designing these systems. The selection of proper spacing between emitters and suitable distance between laterals is mainly related to the wetting pattern dimensions. In this study, an empirical model was developed to predict the dimensio...
Article
The wetting pattern is an important factor to consider when designing and managing a drip irrigation system. The dimensions of the pattern are imperative in selecting the right spacing between emitters and the suitable distance between laterals. We conduct laboratory experiments with surface drip irrigation involving two soil textures (sand and cla...
Conference Paper
Full-text available
The optimal design, operation, and management of drip irrigation systems relies highly on a suitable combination of emitter discharge, spacing between emitters and laterals, rooting depth, soil hydraulic properties, and wetting pattern dimensions under single emitter. The wetting pattern dimensions under surface emitter can be measured in field, la...
Article
Full-text available
Land suitability evaluation (LSE) is a valuable tool for land use planning in major countries of the world as well as in Malaysia. However, previous LSE studies have been conducted with the use of biophysical and ecological datasets for the design of equally important socio-economic variables. Therefore, this research has been conducted at the sub...
Article
Full-text available
Monitoring rice growth and yield estimation using optical remote sensing data constitutes a big challenge largely due to cloud conditions that are typical of tropical regions. Using Radar remote sensing data helps because it overcomes the cloud issue and distinguishes the behaviour of the radar backscattering of rice crops specifically. This study...
Article
Full-text available
Flood events have recently increased and caused extensive damages to the agricultural area and infrastructures, despite enormous efforts to decrease this hazard. Modeling of runoff can be a suitable approach to determine the effective factors in flooding, and to explore reasonable solution and thus to be able reduce hazard on watersheds. The curren...
Article
Full-text available
_________________________________________________________________________________ ABSTRACT—Rainfall is an important component in paddy water demand model for determining daily irrigation requirements. Knowledge of how it is likely to evolve in future is therefore indispensable for paddy farming. This paper presents a quantitative assessment of the...
Article
Full-text available
Rainfall is an important parameter in tropical humid regions for which paddy production systems depend. A significant portion of paddy water requirements is supplied by natural rainfall. Several studies have predicted changes in rainfall patterns and in the amount of rain that may be obtainable in future owing to climate change. There is increased...
Article
Full-text available
A 2D surface electrical resistivity is one of non-destructive methods to investigate groundwater. In this study, 2D resistivity method was used to produce subsurface imaging profiles which are known as ERT (Electrical Resistivity Tomography) at Block C, Sawah Sempadan, Tanjung Karang, Selangor. These ERT profiles were then used to create 3D model v...
Article
Flooding is the major natural hazard that occurs in Malaysia. Flooding causes loss of lives, injuries, property damage and leave economic damage to the country, especially when it occurs in an agricultural area. There is still a lack of information available on floodplain especially on the impact of flooding in the agricultural area. This study foc...
Article
Full-text available
A study was conducted to demonstrate the applicability and efficiency of an irrigation survey method for digging up reliable information to estimate application losses. A sample of 220 tertiary channels was drawn randomly to get information from the growers of the Mirpurkhas subdivision, Jamrao canal irrigation scheme. Pre and post soil moisture st...
Article
Full-text available
Hydrological modelling is representative of current, past or future hydrologic balance. It has been used widely in water-related problem such as drought, flood, water contamination and irrigation. Crops irrigation requires a lot of water to irrigate the root zone layer especially for paddy crops. With the current issues of water such as drought and...
Article
Remote Sensing technologies are capable of providing high-resolution spatial data needed to set up advanced flood simulation models. Amongst them, aerial Light Detection and Ranging (LiDAR) surveys or Airborne Laser Scanner (ALS) systems have long been used to provide digital topographic maps. Nowadays, Remote Sensing data are commonly used to crea...
Chapter
High quality representation of the topographic and the correct representation of significant urban features would be a fundamental foundation to a better urban flood model. Without such a representation, simulation of flood behaviours would be less successful as the flow patterns were completely dependent on ground levels and the shape of the featu...
Article
Full-text available
Digital Terrain Models (DTMs) represent an essential source of information that can allow the behaviour of the urban floodplain, and its interactions with the drainage system, to be examined, understood and predicted. Typically, such data are obtained via Light Detection and Ranging (LiDAR). If a DTM does not contain adequate representation of urba...
Article
In the last few decades, the consequences of floods and flash floods in many parts of the world have been devastating. One way of improving flood management practice is to invest in data collection and modelling activities which enable an understanding of the functioning of a system and the selection of optimal mitigation measures. A Digital Terrai...
Article
Full-text available
An assessment has been carried out to study the performance of seven different LiDAR filtering algorithms and to evaluate their suitability for urban flood modelling applications. It was found that none of these algorithms can be regarded as fully suitable to support such work in its present form. The paper presents the augmentation of an existing...
Article
Full-text available
Digital terrain model (DTM) is one of the important input parameters in urban flood application. This is because it influences the flow direction, flow velocity, flood extend and flood depth. LiDAR offers accurate DTM for large areas within a short period of time. From the overall LiDAR data processes, filtering (classification) poses the greatest...

Network

Cited By

Projects

Project (1)
Project
SPATIAL DISTRIBUTION