River

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https://repoemc.ukm.my/handle/123456789/55

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Now showing 1 - 20 of 122

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A GIS-based water quality model for sustainable tourism planning of Bertam River in Cameron Highlands, Malaysia
(Springer, 2015) Mansir Aminu; Abdul-Nassir Matori; Khamaruzaman Wan Yusof; Amirhossein Malakahmad; Rosilawati Binti Zainol
Cameron Highlands is experiencing rapid development as a popular tourist destination in Malaysia. This causes a rapid boost in construction and other tourism-related activities, such as the growth of vegetables, fruits and flowers. Due to that, the water quality of rivers in the highlands has been adversely affected. In this study, Bertam River, as one of the main streams in Cameron Highlands, was monitored to assess its suitability for recreational activities and conservation. Seven sampling points were selected in the river and tributaries: dissolved oxygen, biochemical and chemical oxygen demands (BOD and COD), total suspended solids (TSS), ammonia nitrate (NH3-N) and pH were measured and the water quality index (WQI) was computed during high and average water flow.
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A multidimensional approach for microplastics monitoring in two major tropical river basins, Malaysia
(Elsevier, 2023) Sabiqah Tuan Anuar; Nor Salmi Abdullah; Nasehir Khan E.M Yahya; Teen Teen Chin; Ku Mohd Kalkausar Ku Yusoff; Yuzwan Mohamad; Alyza Azzura Azmi; Maisarah Jaafar; Noorlin Mohamad; Wan Mohd Afiq Wan Mohd Khalik; Yusof Shuaib Ibrahim
Microplastics (MPs) with the size of 1 µm–5 mm are pollutants of great concern ubiquitously found in the environment. Existing efforts have found that most of the MPs present in the seas mainly originated from land via riverine inputs. Asian rivers are known to be among the top in microplastic emissions. However, field data are scarce, especially in Malaysia. This study presents the distribution and characteristics of MPs in the surface water of two major river basins of Malaysia, namely Langat River (West Coast/Straits of Malacca) and Kelantan River (East Coast/South China Sea). Water samples were collected at 21–22 locations in Kelantan and Langat rivers, covering the river, estuary and sea.
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A new soft computing model for daily streamflow forecasting
(Springer, 2021) Saad Sh. Sammen; Mohammad Ehteram; S. I. Abba; R. A. Abdulkadir; Ali Najah Ahmed; Ahmed El-Shafie
The ability to forecast streamflow is crucial, as it can help mitigate flood risks. Long-term stream flow data records are needed for hydropower plant construction, flood prediction, watershed management, and long-term water supply use. An accurate assessment of streamflow is considered as very challenging and critical tasks. A new predicting model is developed in this research, combining the technique of sunflower optimization (SFA) as an evolutionary algorithm with the multi-layer perceptron (MLP) algorithm to predict streamflow in Malaysia's Jam Seyed Omar (JSO) and Muda Di Jeniang (MDJ) stations.
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A preliminary study of the distribution of selected trace metals in the Besut River Basin, Terengganu, Malaysia
(Springer, 2008) S. Suratman; H. C. Hang; N. A. M. Shazili; N. Mohd Tahir
This paper presents a preliminary result carried out in the Besut River basin, Terengganu, Malaysia to determine the selected trace metal concentrations.
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A Review: Removal of Sediment in Water Reservoir by using Siphon
(IOP Publishing, 2021) W N Rizzuan; Mohd Remy Rozainy Mohd Arif Zainol; Mahyun Ab Wahab; Choong Wee Kang; Ikhsan Setiawan
This paper provides a framework to understand deeply the principles of siphon and to improve the design of the siphon to remove the sediment in reservoir.
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A study of the Ampang landfill leachate characteristics and its effects on river water quality parameters
(Universiti Malaya, 2003) Fatimah Kamal Batcha; P. Agamuthu; Shaliza Ibrahim
Physical and inorganic parameters have been measured for leachate from the Ampang Municipal Landfill before and after the landfill was closed. Although there were significant reduction in the parameter concentrations after the landfill closure, the COD value was still 20 times higher than the requirement of EQA 1974 Standard A. BOD, TSS, Fe, Mg, Cd and Pb were also higher than the Standards requirements after closure. The effects of leachate seeping into the Michu River, have been investigated through analyses of water samples taken along the Michu and Langat Rivers up to the Puncak Niaga Langat River water intake point.
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Accumulation and risk assessment of heavy metals employing species sensitivity distributions in Linggi River, Negeri Sembilan, Malaysia
(Elsevier, 2021) Muhammad Raznisyafiq Razak; Ahmad Zaharin Aris; Nurul Amirah Che Zakaria; Sze Yee Wee; Nur Afifah Hanun Ismail
The constant increase of heavy metals into the aqueous environment has become a contemporary global issue of concern to government authorities and the public. The study assesses the concentration, distribution, and risk assessment of heavy metals in freshwater from the Linggi River, Negeri Sembilan, Malaysia. Species sensitivity distribution (SSD) was utilised to calculate the cumulative probability distribution of toxicity from heavy metals. The aquatic organism's toxicity data obtained from the ECOTOXicology knowledgebase (ECOTOX) was used to estimate the predictive non-effects concentration (PNEC).
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An assessment of sediment and nitrogen input into the upper Merbok estuary, Kedah, Malaysia
(Springer, 2015) Wan Ruslan Ismail; Mohd Nazrul Ibrahim
The increased loss of nutrients via agricultural runoff has serious potential ecological and public health implications. This paper discusses water quality and nutrient inputs into Merbok river in Northern Malaysia.
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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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Analysis of water quality trends using the Mann-Kendall test and Sen's estimator of slope in a tropical river basin
(University of Tehran, 2021) Mohmadisa Hashim; Nasir Nayan; Dewi Liesnoor Setyowati; Zahid Mat Said; Hanifah Mahat; Yazid Saleh
Trends in water quality, either increasing or decreasing over the long term, are becoming an essential guide to understanding water quality. This study aims to analyse the trends in water quality in the upstream part of the Bernam River Basin, Malaysia from 1998 to 2018. This study involved the collection of data on water quality from the Department of Environment, Malaysia. Six main parameters of the water quality index (WQI) were chosen, including the dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), ammoniacal nitrogen (NH3-N), total suspended solids (TSS) and pH. The analysis methods applied are the Mann-Kendall test and Sen's estimator of slope.
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Anthropogenic impacts on the distribution and biodiversity of benthic macroinvertebrates and water quality of the Langat River, Peninsular Malaysia
(Elsevier, 2006) M.Z. Azrina; C.K. Yap; A. Rahim Ismail; A. Ismail; S.G. Tan
A study of the impacts of anthropogenic activities on the distribution and biodiversity of benthic macroinvertebrates and water quality of the Langat River (Peninsular Malaysia) was conducted. Four pristine stations from the upstream and 4 stations at the downstream receiving anthropogenic impacts were selected along the river. For 4 consecutive months (March-June 1999), based on the Malaysian DOE (Malaysia Environmental Quality Report 2000, Department of Environment, Ministry of Science, Technology and Environment Malaysia. Maskha Sdn. Bhd. Kuala Lumpur, 86pp; Malaysia Environmental Quality Report 2001, Department of Environment, Ministry of Science, Technology and the Environment Malaysia) water quality index classes
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Anthropogenic waste indicators (AWIs), particularly PAHs and LABs, in Malaysian sediments: Application of aquatic environment for identifying anthropogenic pollution
(Elsevier, 2016) Najat Masood; Mohamad Pauzi Zakaria; Normala Halimoon; Ahmad Zaharin Aris; Sami M. Magam; Narayanan Kannan; Shuhaimi Mustafa; Masni Mohd Ali; Mehrzad Keshavarzifard; Vahab Vaezzadeh; Sadeq Abdullah Abdo Alkhadher; Najat Ahmed Al-Odaini
Polycyclic aromatic hydrocarbons (PAHs) and linear alkylbenzenes (LABs) were used as anthropogenic markers of organic chemical pollution of sediments in the Selangor River, Peninsular Malaysia. This study was conducted on sediment samples from the beginning of the estuary to the upstream river during dry and rainy seasons.
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Application of artificial intelligence methods for monsoonal river classification in Selangor river basin, Malaysia
(Springer, 2021) Yong Jie Wong; Yoshihisa Shimizu; Akinori Kamiya; Luksanaree Maneechot; Khagendra Pralhad Bharambe; Chng Saun Fong; Nik Meriam Nik Sulaiman
Due to its tropical climate, the impact of seasonal monsoons on river quality is significant, with the increased occurrence of extreme precipitation events; however, there has been little discussion on the application of artificial intelligence models for monsoonal river classification. In light of these, this study had applied artificial neural network (ANN) and support vector machine (SVM) models for monsoonal (dry and wet seasons) river classification using three of the water quality parameters to minimise the cost of river monitoring and associated errors in WQI computation.
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Artificial neural network modeling of the water quality index for Kinta River (Malaysia) using water quality variables as predictors
(Elsevier, 2012) Nabeel M. Gazzaz; Mohd Kamil Yusoff; Ahmad Zaharin Aris; Hafizan Juahir; Mohammad Firuz Ramli
This article describes design and application of feed-forward, fully-connected, three-layer perceptron neural network model for computing the water quality index (WQI)1 for Kinta River (Malaysia).
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Assessing the changes in river water quality across a land-use change (forest to oil palm plantation) in peninsular Malaysia using the stable isotopes of water and nitrate
(Elsevier, 2023) Masayuki Itoh; Ken'ichi Osaka; Kotaro Iizuka; Yoshiko Kosugi; Marryanna Lion; Satomi Shiodera
Land conversion from natural forests to plantations (e.g., oil palm) in Southeast Asia is one of the most intensive land-use changes occurring worldwide. To clarify the effects of oil palm plantations on water quality, we conducted multipoint river and stream water sampling in peninsular Malaysia at the end of the rainy season over a 3-year period (2013-2015).
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Assessment of hydrologic impacts of climate change on the runoff trend in Klang Watershed, Malaysia
(Springer, 2015) Reza Kabiri; V. Ramani Bai; Andrew Chan
The research involves connecting hydrology modelling to climate change downscaled output by GIS system to enhance the understanding of the impact of climate change scenarios on the river flow. The study provides the useful hydrology data for the future development in Klang watershed.
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Assessment of metal concentrations from recreational rivers in a tropical region (Jengka, Malaysia)
(Springer, 2022) Fazrul Razman Sulaiman; Che Mohamad Fakhrul Hafz Che Mohd Shamshudin; Muhammad Haziq Abd Rahim; Noorzamzarina Sulaiman
A recreational river may be exposed to some extent of metal pollution. Two rivers, namely Sungai Weh and Sungai Jempul, were selected for this study, as both areas offer recreational activities for residents in Jengka, Pahang, Malaysia. This study examines the concentration of selected metals (Fe, Mn, and Pb), elucidates the possible sources, evaluates the toxicity loads, and estimates the potential health risk.
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Assessment of surface water quality of selected estuaries of Malaysia: multivariate statistical techniques
(Springer, 2008) Abbas F. M. Alkarkhi; Anees Ahmad; Azhar Mat Easa
Multivariate statistical techniques such as cluster analysis (CA), factor analysis (FA) were used for the evaluation of spatial variations and the interpretation of a large complex water quality data set of two selected estuaries of Malaysia. The two locations of interest with 10 sites in each location were Kuala Juru (Juru estuary) and Bukit Tambun (Jejawi estuary).
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Assessment of the characteristic of nutrients, total metals, and fecal coliform in Sibu Laut River, Sarawak, Malaysia
(Springer, 2016) Chen-Lin Soo; Teck-Yee Ling; Nyanti Lee; Kasing Apun
The concentrations of nutrients (nitrogen and phosphorus), total metals, and fecal coliform (FC) coupling with chlorophyll-a (chl-a), 5-day biochemical oxygen demand (BOD5) and other general environmental parameters were evaluated at the sub-surface and near-bottom water columns of 13 stations in the Sibu Laut River during low and high slack waters.
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Assessment of trace metals in water and sediment in a tropical river potentially affected by land use activities in Northern Sarawak, Malaysia
(Springer, 2017) Siong Fong Sim; Mugilan Rajendran; Lee Nyanti; Teck Yee Ling; Jongkar Grinang; Jing Jing Liew
This paper reports the trace metals in water and sediment of the Baram river in Northern Sarawak, Malaysia, a tropical river that is subjected to increasing land use activities, particularly logging.