Water

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The use of an agricultural rainfall index in Malaysia
(Springer, 1982) M. Z. Ghazalli; S. Nieuwolt
Monthly rainfall probabilities of 80% are expressed as percentage of the potential evapotranspiration. This monthly value, called the Agriculture Rainfall Index, is used in zoning Peninsular Malaysia into agroclimatic regions, based on length of dry periods. Four agroclimatic zones are recognized in Peninsular Malaysia. These are (a) regions which have regular dry seasons for up to four months, (b) regions which have less regular and shorter dry seasons, (c) regions with a fairly regular occurrence of two dry seasons per year, and (d) regions with low risks of a dry period.
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Heavy metal concentrations in coastal seawater and sediments off Prai Industrial Estate, Penang, Malaysia
(Pergamon Press Ltd, 1987) CE Seng; PE Lim; TT Ang
In view of the importance of the Juru estuary and its surrounding coastal area to the aquaculture activities, the discharge of industrial effluents and, as a result, the addition of heavy metals into these areas have been examined. Six sampling sites were chosen along marine coastal areas
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The effects of agrochemicals on an aquatic ecosystem : A case study from the Krian River basin, Malaysia
(Springer, 1990) SIAW-YANG YAP; HEAN-TATT ONG
The existing environment of the Krian River basin in Malaysia is not in its natural form for it has been much developed into agricultural lands (105,000 ha). The growing demand for agricultural lands requires further reclamation of swampy forests, which will result in an increased use of fertilisers (estimated 10 percent increase, from 29,500 t to 32,500 t), weedicide, dalapon (estimated 6 percent increase, from 187,620 kg to 199,530 kg) and pesticides, BHC and thiodan/endosulfan (estimated 2 percent increase, from 312 kg to 318 kg).
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Phenolic water pollutants in a Malaysian River basin
(Kluwer Academic Publishers, 1991) Md. Pauzi Abdullah; Hamonangan Nainggolan
Phenolic chemicals with their very low taste and odour thresholds, high persistence and toxicity, are of growing concern as water pollutants. The compounds are known to exist in raw water as well as in treated water. The level of phenolic priority pollutants in water within the catchment area of the Linggi River Treatment Plant in Negeri Sembilan, Malaysia, which includes the Linggi river basin, was monitored.
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Analysis of pesticide residues in Peninsular Malaysian waterways
(Kluwer Academic Publishers, 1991) Tan Guan Huat; Goh Swee Hock; Vijayaletchumy
The use of organochlorine pesticides has caused concern due to their effects on human health and the Malaysian aquatic ecosystem, particularly so in view of their persistent and bioaccumulative properties. Since the extent of organochlorine pesticide pollution in Malaysian waterways is unknown except for isolated instances, a systematic survey has now been carried out.
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Trace monitoring of water-borne phenolics in the Klang River Basin
(Kluwer Academic Publishers, 1993) Guan H. Tan; C.L. Chong
The Klang River Basin is located in the most densely populated region in Malaysia, with its heavy concentration of industries and population. A systematic study of the pollution to this river system caused by phenolic compounds have been carried out under this project. Analyses of water samples from the Klang River by high performance liquid chromatography (HPLC) with an ultraviolet (UV) detector
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Hydrocarbons in seawater and sediment from the west coast of Peninsular Malaysia
(Springer, 1994) A. R. Abdullah; N. M. Tahir; L. K. Wei
The present study was undertaken to determine the levels of hydrocarbons in water and sediments along the near-coastal areas of the Straits of Malacca.
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Organochlorine pesticide residue levels in Peninsular Malaysian rivers
(Springer, 1994) G. H. Tan; K. Vijayaletchumy
The present study was carried out to measure the extent of environmental contamination by these organochlorine pesticides in river waters from Peninsular Malaysia. Water samples were collected from different stations along 25 major rivers in Peninsular Malaysia (Figure 1) from 1990 to 1991.
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Residue levels of phthalate esters in water and sediment samples from the Klang River basin
(Springer, 1995) G. H. Tan
The present survey on residue levels of phthalate esters covers the period from January 1992 to February 1993.
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Groundwater quality investigation at North Kudat, Sabah, Malaysia
(Universiti Malaysia Sabah, 1996) Majid M. Faisal; Sanudin Hj. Tahir; Shariff A.K. Omang; Khairiah Jusoh
Chemical and physical compositions of groundwater samples collected from various stations throughout the study area were determined in order to describe the background of ion concentration and to identify the major hydrochemical processes that control the groundwater chemistry
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Temporal and spatial characteristics of rainfall in Kuala Lumpur, Malaysia
(Elsevier, 1996) M.N. Desa; J. Niemczynowicz
Knowledge of temporal and spatial characteristics of rainfall in Kuala Lumpur, Malaysia is still lacking and they are still considered important for more efficient management of the implemented urban water resources projects. In view of this, a study was conducted to characterise the historical rainfall phenomena (from 1982 to 1992). Statistical properties of annual, monthly, and minutes rainfall were derived.
Open Access
Maritime circulation of the South China Sea: A numerical study
(Universiti Pertanian Malaysia Press, 1996) Alejandro Camerlengo; Monica Ines Demmler
A numerical model employing the classic hydrodynamic equations of conservation of mass and momentum, vertically integrated, has been developed. The model solves the external, or barotropic, mode. The computational mode is eliminated by employing a Euler backward scheme at every N (odd) time level. A similar model is used for issuing flood warnings of hurricanes and extratropical storms. This type of model is also used in a variety of situations such as oil spill simulations, storm surges, tsunamis, and tidal simulations. The aim of this investigation is to gain some insight into the circulation of the South China Sea during the N E and S W monsoon seasons.
Open Access
Surface circulation off Kuala Terengganu in the transitional period between the northeast and southwest monsoons
(Universiti Pertanian Malaysia Press, 1996) Mohd. Nasir Saadon; Meged Mahmoud Marghany
The aim of this investigation is to understand the surface current circulation pattern off Kuala Terengganu. A drifting drogue was used to measure surface current during April 1993, the transitional period between the northeast and southwest monsoon seasons.
Open Access
Impact modeling of sewage discharge from Georgetown of Penang, Malaysia on coastal water quality
(Kluwer Academic Publishers, 1997) Hock Lye Koh; Poh Eng Lim; Hooi Ling Lee
Currently about 200,000 persons of the Penang Georgetown population is served by a sewerage system which conveys the raw sewage to an open channel flume in Jelutong for discharge into the Western Channel. This has resulted in the degradation of coastal water quality in the affected areas. Therefore, there exists an urgent need to look for other alternatives for sewage treatment and disposal. This paper presents the results of computer simulations on the impacts of sewage discharge on Penang coastal waters under two treatment and disposal options.
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Thermal springs of Malaysia and their potential development
(Elsevier, 1997) Abdul Rahim Samsudin; Umar Hamzah; Rakmi Ab. Rahman; Chamhuri Siwar; Mohd Fauzi Mohd Jani; Redzuan Othman
The study on the potential development of hot springs for the tourism industry in Malaysia was conducted. Out of the 40 hot springs covered, the study identified 9 hot springs having a high potential for development, 14 having medium potential and the remaining 17 having low or least potential for development.
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Determination of total hydrocarbon concentration in coastal waters and sediments off the east coast of Peninsular Malaysia
(Chapman & Hall, 1997) Norhayati Mohd. Tahir; A.R. Abdullah; S. Shanmugam
To determine the level of total hydrocarbon concentrations (THCs) along the eastern coastal regions of Peninsular Malaysia, samples of subsurface seawater (1 m) and surface sediments were collected from several sampling stations between June and August 1993.
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A preliminary geochemical study on Manukan Island, Sabah
(Universiti Malaysia Sabah, 1997) Mohd. Harun Abdullah; Baba Musta; Mohamad Md. Tan
The study was carried out to determine the geochemical elements in the soil and groundwater in Manukan Island, Sabah.
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Dynamics of short rainfall storms in a small scale urban area in Coly Limper, Malaysia
(Elsevier, 1997) M.N.M. Desa; J. Niemczynowicz
Short term storm rainfalls are recorded with a dense network of fine resolution rain gauges well distributed in a small urban catchment in Kuala Lumpur, Malaysia. The period of data collection covers the south-west monsoon (July-September), inter monsoon (October) and partly the north-east monsoon (November-December) seasons. This paper presents some findings with reference to the dynamic properties of short rainfall storms using the method of vector analysis and farther correlation analysis.
Open Access
Monthly distribution of precipitation in Peninsular Malaysia
(Universiti Pertanian Malaysia Press, 1998) Alejandro Livio Camerlengo; Mohd. Nasir Saadon; Ahmad Shazli Aziz; Mohd. Rosni Othman
A study was made of the monthly distribution of rainfall in Peninsular Malaysia. It is shown that the principal influence is given by the passage of the Intertropical Convergence Zone (ITCZ), while the secondary influence is the effects of both the NE and the SW monsoons.
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Phreatic water quality of the Turtle Islands of East Malaysia: Pulau Selingaan and Pulau Bakkungan Kechil
(Universiti Malaysia Sabah, 1999) Mohd Harun Abdullah; Baba Musta
The current water quality of the upper phreatic aquifer fo two small offshore islands were monitored in order to understand its temporal variation on such ecosysem. The rock types and geological stratiagraphy of the islands were identified and related to its ground water chemistry.