46 research outputs found
Variations of Southern South China Sea characteristics near Pahang
Oceanographic cruises in Pahang water in October 2003 and April 2004, monsoon transition months, produce data on water characteristics. The temperature in both months showed higher values in nearshore compared to the offshore stations. The nearshore salinity in both months is lower than offshore stations. Comparatively, there were smaller differences in temperature and salinity in October than in April, with very little variation between nearshore and offshore stations. T-S diagram showed significant differences between October and April water characteristics. According to the water characteristic observations, the temperature and salinity in October was lower than in April, while dissolved oxygen was higher than in April. The lower temperature and salinity taken during the sampling time in October suggested that during this time, the study area already received the influences of strong winds due to upcoming monsoon. The warmer and saltier water obtained in April showed that during this time, the study area was influenced by southwest monsoon.Winds related to rainfall were observed to have impact to the dynamics of water characteristics during both months
Establishing a GIS-SMCDA Model of Sustainable Eco-Tourism Development in Pahang, Malaysia
In this study on dynamic, complex, and spatial decision making situations, the geographic information system (GIS)
based spatial multi-criteria decision analysis (SMCDA)
is used as a tool for sustainable environmental planning
and ecotourism spot study. GIS is used to identify and study
the morphological zones of coastal resorts and ecotourism sustainability in Sungai Karang sub-district in Kuantan,
Pahang. To evaluate the geographic information of the
state, the development of geodatabase and spatial modeling
were used as one of the most appropriate GIS-SMCDA models to create new dimensions for understanding the current situation in the identification of ecotourism-sensitive areas (ESA). The results in the final ESA map show that the size of the zones for the built-up area: 4,500.25 ha, agricultural area: 3,635.87 ha, coastline: 2,109.67 ha, road: 3,518.72 ha, and water bodies: 8,899.37 ha. The study
suggests that the GIS-SMCDA model can be a quite effective method for dealing with different parameters of site
attractiveness for ecotourism sustainability. The results
show that the area of a suitable site for ecotourism in Sungai Karang Sub-district is 248.87 ha, compared to an
unsuitable site of 29,104.44 ha. This shows that a minimum area can be selected for the construction of an ecotourism center in this area
Simulation and analysis of sea-level change from tide gauge station by using artificial neural network models
Sea level change is one of the most certain results of global warming. Sea level change would increase erosion in coastal areas, result in intrusion into water supplies, inundate coastal marshes and other important habitats, and make the coastal property more vulnerable to erosion and flooding. This situation coincides with the massive socio-economic development of the coastal city areas. The coastal areas of the East Coast of Peninsular Malaysia are vulnerable to sea-level change, flooding, and extreme erosion events. The monthly Mean Sea Level (MSL) change was simulated by using two Artificial Neural Network (ANN) models, Feed Forward- Neural Network (FF-NN) and Nonlinear Autoregressive Exogenous- Neural Network (NARX-NN) models. Both models did well in recreating sea levels and their fluctuating patterns, according to the data. The NARX-NN model with architecture (5-6-1) and four lag options, on the other hand, got the greatest results. The findings of the model’s mean sea level rise simulation show that Kuala Terengganu would have a growing and upward trend of roughly 25.34 mm/year. This paper shows that the eastern coast of Malaysia is highly vulnerable to sea-level rise and therefore, requires sustainable adaptation policies and plans to manage the potential impacts. It recommends that various policies, which enable areas to be occupied for longer before the eventual retreat, could be adapted to accommodate vulnerable settlements on the eastern coast of Malaysia
GIS And Oil Spill Tracking Model in Forecasting Potential Oil Spill-affected Areas Along Terengganu and Pahang Coastal Area
Oil contamination can occur accidentally or incidentally in the environment as long as petroleum or shipping activities exist. There is a need to take appropriate preventive measures to reduce the negative impact by carefully monitoring the sprinkles and dispersion particles due to the oil spill movement. An expected oil spill originating from the Resak platform is positioned at 49.1 nautical miles from the Kuala Terengganu shoreline. The Dulang platform, positioned at 69.8 nautical miles from the Kuala Terengganu, can pollute the coastline of the Terengganu and Pahang ecosystems. This study aims; (i) make predictions from the direction of oil particle dispersion and (ii) engage the ecosystem to determine the effect of an oil spill on a platform around the coastal area. The combination of the Geographic Information System (GIS) and the Oil Spill Trajectory Model (OSTM) has been used to establish the appropriate response to locate the dense area of the slick. The result from the model running show in Northeast (NE) monsoon season, Terengganu and Pahang, have a high potential to affect. It is highly likely to reach the Terengganu coast area, especially in Dungun. It was predicted that 466 barrels of oil would arrive within four days of the December incident. Moreover, Kemaman and Pekan districts in Pahang also have the highest risk of being exposed to oil pollution during the Northeast Monsoon. This is due to the wind factors, which blow from South to North along the East coast of Malaysia Peninsular with a speed maximum of 13 ms-1 and indirectly carry the oil particles to coastal areas in Terengganu and Pahang
Surface circulation and temperature distribution of Southern South China Sea from Global Ocean Model (OCCAM)
The South China Sea (SCS) circulation in its southern region in the area between Peninsular Malaysia and East
Malaysia was studied from the OCCAM (Ocean Circulation and Climate Advanced Modelling). This research aimed
to illustrate the general overview of the seasonal surface current circulation and the surface temperature profile which are lacking in the region. The current along the Malaysia coast flows northward in the southwest monsoon and move in opposite direction in northeast monsoon with the maximum speed of 0.4 m/s and 1 m/s, respectively. While the current flows southward, the cooler water is transported into the region which reduces the temperature at the central of the basins nearly 3 °C. The study manages to analyse the importance of the monsoonal system on the region circulation and temperature distribution
Dynamics and Seasonality of the Leeuwin Current and the Surrounding Counter-Current System in the Region South of Western Australia
Surface circulation associated with the Leeuwin Current System off the southern coast of Western Australia was simulated using the Regional Ocean Model Systems (ROMS). The Leeuwin current (LC) and Flinders current (FC) were reproduced in two simulation: with and without wind stress. The inclusion of wind resulted in a strong LC during autumn and winter months with the LC flowing close to the shelf, accelerating after reaching the south-west corner at Cape Leeuwin. The geopotential gradient was present through all seasons, indicating that it is the major driving force of the currents. At the subsurface, continuation of the opposing undercurrent present at the southwest corner. Interchanging of strength and transport between LC and FC can be seen between seasons, where LC strength drops significantly in autumn and winter when the wind stress is low and this subsequently increases the FC transport. The FC strength declines in summer when there is no wind stress, which during this time LC is stronger. Meanwhile, the analysis shows an inshore presence of Cresswell current is evident along the coast when there is south-easterly wind in summer. The study provides comprehensive overview of the complex currents system where wind influence proves to be determining factors to the current system
The Effects of Different Inlet Configurations on Particles Transport and Residence Time in a Shallow and Narrow Coastal Lagoon: A Numerical Based Investigation
Setiu Lagoon experienced shoreline alterations, leading to the opening of a new inlet and the closing of the old one. To evaluate the effects of these alterations on the tidal flow in this shallow and narrow lagoon, a numerical hydrodynamic model was developed. The model-predicted water level and current velocities were validated against field measurements, which yielded a high simulation skill. The transport of particles and residence time under different inlet configurations were also investigated through the implementation of numerical tracers released from R1, R2, and R3, which represent different pollution sources. The results indicated that the particle transport and residence time in Setiu Lagoon varied spatially and temporally depending on the release locations, proximity to the inlet, and tidal current strength. Comparing the scenarios, the flushing efficiency in Setiu Lagoon was improved with the presence of both inlets, resulting in a shorter residence time of less than 50 days. The findings of this research are vital for understanding the water current flow and residence time in this restricted lagoon, while evaluating the possible adverse effects on its water quality. Although this work is case-study based, the output is applicable to other lagoon systems with similar characteristics
Tidal circulation in Bay of Chagar Hutang, Malaysia
833-841Present study consists the physical characteristics of the coastal water within small bay of Chagar Hutang at Redang Island. Temperature distributions in the bay were in the range of 27.9 30.5°C. Surface current split into two directions, directed to northwest and southeast in diurnal timescale, while bottom current directed to northeast and southwest. Surface water maximum speed recorded was 0.48 m/s and bottom water maximum speed was 0.16 m/s. Tidal current of the study area is of mixed-diurnal tide
Coastal oceanographic processes associated with blood cockle (Anadara granosa) induce spawning season in Kapar, Selangor, Malaysia
Study on coastal processes in Kapar waters was conducted from 2008–2016. The aim of this study is to identify potential blood cockle (Anadara granosa) induce spawning ground based on physical intermittency. A total of 132 sampling stations were recorded. A thermal power station situated 2km away is discharging treated warm water (3m MSL) which prevents cockle farmers from harvesting due to their maximum of 3m long hand dredge. Thus, this information could be useful for cockle sustainable management plan in near future