Download Water Resources Langat River

Total Page:16

File Type:pdf, Size:1020Kb

Download Water Resources Langat River Establishment of Sustainability Science Demonstration Project on Restoring and Managing Langat River, Malaysia for Future WATER RESOURCES MANAGEMENT IN LANGAT RIVER BASIN - ISSUES & STRATEGIES HASLINA AMER PRINCIPAL ASSISTANT DIRECTOR SELANGOR WATER MANAGEMENT AUTHORITY (SWMA/LUAS) BACKGROUND • Selangor together with the Federal territories of Kuala Lumpur and Putrajaya covers an area of 8,396 km2. Population : 4 million • The core sectors of Selangor's economy are commerce, industries and services. The most developed state in the country . • Selangor Water Management Authority (SWMA/LUAS) is a one-stop agency/River Basin Organization (RBO) for Particular Amount the management of water resources, river basin, water Annual Rainfall 2.19m bodies, ground water and coastal waters in the State of Selangor under the Selangor Waters Management Annual Evapotranspiration 1.28m Authority Enactment 1999. Annual seepage to ground 0.15m Annual Runoff 0.76m Quantity & Quality Total Annual Runoff 7,074 MCM Average Runoff 19,383 MLD Monitoring & Environment Utilization for water supply (4,600 24% Enforcement & Ecosystem MLD) FUNCTIONs Utilization for irrigation (1,600 MLD) 8% (17) Total Utilization (6,200 MLD) 32% Integrated Water Approach Demand WATER RESOURCES MANAGEMENT IN MALAYSIA Water Resources Utility Services Management Federal Selangor State Government Government (Concurrent List –Federal Constitution) Selangor Water Management Authority National Water (LUAS/SWMA) Economic Planning Unit Services (Water Supply Commission Enactment) (SPAN) Water resources (river, (WSIA) lake, pond, air ground water, coastal, etc) (Water Resource Abstraction License) Water Abstraction For Water Distribution/ Resources Treatment Plant (32 WTP) Water Supply Abstraction Others To User Purpose Pengurusan Air 1. SPLASH Sdn. Bhd. Company / Selangor Sdn. Bhd. Individual 2. Pengurusan Air Selangor Sdn. Bhd. LANGAT RIVER BASIN • Catchment area 2,409km2 (190 km) and straddles two states (Selangor & Negeri Sembilan(19%)), Federal Territories of Putrajaya and 5 local authorities. • Second largest river basin in Selangor and is the second most rapid economic growth area in the country. • Main water source for Selangor and Klang Valley conurbation (9 water intake- 1110MLD for water supply) • Water Quality Index For Langat River is slightly polluted (73, Jun 2016). Source DOE. • Iconic land use features, such as Putrajaya, Sepang Circuit and KLIA • Langat River as inland water navigation (northern Langat estuary) Langat River IRBM Policy Policy 1: Ensure sufficient water Policy 2 : Ensure clean water Policy 3 : Reduce Risk Of Flooding Policy 4 : Facilities for river inland navigation ISSUES & CHALLENGES • Rapid urbanisation and industrial development that have resulted in water, land and related resources within the basin becoming increasingly under stress • Threat of climate change, creating extreme variability in climate • Deterioration of river water quality • Degradation on environment • Fragmentation in water governance structures • Trans-boundary nature of the Langat River Basin illustrates the complexities to implement IRBM TRANSBOUNDARY ISSUES IN LANGAT RIVER BASIN Langat River Semenyih River Jenderam Hilir Water Intake Semenyih Water Treatment Plant shut down due to odor pollution from illegal dumping of solvent at the slope KM 45.9 ELITE highway flow to the drainage system then to Sungai Buah (23 Oct 2016, 22 ton) Approximately 1.8 million people involved in water supply distruption . Prevention work has been done at Nilai Industrial site that involved Water Resources Area Pollution Emergency Committee by construction of bund and the used of activated carbon. (0 ton) WATER RESOURCES MANAGEMENT STRATEGIES IN LANGAT RIVER BASIN 1. LEGISLATION AND POLICIES FOR WATER RESOURCES MANAGEMENT IN SELANGOR (LUAS ENACTMENT 1999) Emission or Discharge Inland Waterway Abstraction of Water of Pollutants (State of Navigation (State of Source (State of Selangor) Regulations Selangor) Regulations Selangor) Regulations 2012 Enactment 1999 2012 2012 Resource Alteration Selangor River Selangor Lake Activity (Selangor) Management Management Regulations 2013 Strategy,2012 Strategy,2014 Gazette of Zone Water Diversion for Protection (Declared Electricity Generation Area and Restriction) (State of Selangor) Notification, its include 2014 river reserve, dam water catchment. WATER RESOURCES MANAGEMENT STRATEGIES cont… 2. WATER QUANTITY AND QUALITY CONTROL i Charging and Licensing of Water Abstraction, s.41(2) ii Written Approval of Alteration Activities, s.43(1) iii Licensing of Emission or Pollutant Discharges, s.79(1) iv Licensing of In Land Waterway Navigation, s.97(1) v Licensing of Water Diversion For Hydro-Electricity, s. 42(3) vi Licensing of Water Recreational Activities, s. 98(1) – final stage WATER RESOURCES MANAGEMENT STRATEGIES cont… • 3. Monitoring and integrated enforcement with the relevant agencies including the Local Authorities, Land and District Office and stakeholders in Langat River Basin. • 4. Static Monitoring (24 hours) to identify the pollution sources for example during the odor pollution at Semenyih River and Buah River that caused shut down of Semenyih Water Treatment Plant. • 5. Implementation of “INTEGRATED RIVER BASIN MANAGEMENT,IRBM“ approach to manage Langat River Basin by establishing the ‘River Basin and Coastal Management Committee’ chaired by State Secretary . Langat River Basin Task Force as the platform to plan the integrated action among the agencies chaired by LUAS Director. • 6. Mapping of potential pollution sources in Langat River Basin by using E-LUAS to enhance the monitoring for each sub basin. WATER RESOURCES MANAGEMENT STRATEGIES cont... 7.Gazettement For Conservation Of Water Resources • Gazettement of 50 meter Langat River Reserve as zone of protectionb(s48, LUAS Enactment 1999) • Gazettement of Langat and Semenyih Dam Water Catchment on 2 Dec 2010 • Gazettement of 3 alternative ponds for additional water resources - Labohan Dagang MC8 & MC9, Kuala Langat District- (Construction of Labohan Dagang Water Treatment Plant, 400 MLD) Labohan Dagang WTP WATER RESOURCES MANAGEMENT STRATEGIES cont... 8.DATA MANAGEMENT AND MONITORING TOOLS • “Integrated Water Resources Information Management System, (IWRIMS)” on 2012 for real time data monitoring at seven dams in the Selangor State. • Installation of online monitoring station in Langat River Basin to complement the existing station • Development of a “Decision Support System (DSS)” also known as ‘LUAS Intelligent Support System, LiSS’ • The purpose of the development are to recommend dam operator the water release that required at the dam outlet over the next 36 hours • Planning to replicate for Langat River on 2017 WATER RESOURCES MANAGEMENT STRATEGIES cont... 9.Selangor - Pahang Interstate Water Transfer - From Sungai Semantan, Pahang to Sungai Langat (Outlet Portal Sungai Serai). - Capacity about 300-500 MLD with travelling time more than 10 hours via tunnel (infrastructure Langat 2 WTP) Semantan Water Intake - The water transfer will be activate to optimize the dam water release and when the Ammonia level more than 1.5 mg/l at Sungai Langat (dilution factor) 10.Water Pumping at Semenyih Outlet Portal Serai River Dam To Sungai Lui and next to Lui River Sungai Langat (70 MLD) - The purpose is to increase the capacity of Sungai Langat for water intake operation at downstream and to optimize dam water release. Water Pumping Station – Semenyih Dam WATER RESOURCES MANAGEMENT STRATEGIES cont... 11.APPLICATION OF ORS (OFF RIVER STORAGE) IN LANGAT RIVER BASIN Ponds functioned as dilution medium naturally to reduce AN level (40-50%) in Langat River to ( <1.5mg/l) Area : 6500m2 Design Capacity : 32MLD LUAS Water Pumping Operation at Bukit Tampoi Pond To Bukit Area : 4600m2 Tampoi Water Intake WATER RESOURCES MANAGEMENT STRATEGIES cont... 12. CLOUD SEEDING OPERATION AT LANGAT AND SEMENYIH DAM WATER CATCHMENT • Cloud seeding operation by using ‘hygroscopic flare’ at Langat and Semenyih Dam to enhance the intensity of rain and increase the dam water level . • Cloud seeding operation has been conducted daily subject to the weather condition (humidity, towering cumulus, wind direction etc) WATER RESOURCES MANAGEMENT STRATEGIES 13. ENHANCING PUBLIC AWARENESS PROGRAMS • Awareness program such as QUA QUA Program and Mangrove Replanting Program has been organized yearly. • Involvement of stakeholders such as community, water operators, school & universities, NGO, QUA QUA Education Site at private sector etc. Lubok Manggis Camp , Hulu Langat • QUA QUA - Environmental Education Program which learn how to monitor the quantity and quality of the river from physical, chemical and biological indicators in the river. • River Adoption Program has been launched this year with cooperation of Local Authorities and local community involvement after the Beach Cleaning and Mangrove successfulness of Beach Adoption Program. Replanting Program at Bagan Lalang Beach, Sepang ConclusionCONCLUSIONand Recommendation AND RECOMMENDATION • Integrated and Holistic Approach in Water 1 Resources Management • Strengthen the legislation and enforcement 2 • Improve Capacity Building for River Basin 3 Management and Public Participation • Improve Information Sharing and 4 Dissemination ACKNOWLEDGEMENT • Selangor State Government (UPEN), EXCO Of Environment, Tourism, Green Technology and Consumer Affairs etc • TECHNICAL AGENCIES : DOE, DID, DVS, DTCP, DOForestry, etc • LOCAL AUTHORITIES : (MPKj, MPSp, MDKL, MPN (Negeri Sembilan), PPj), • LAND AND DISTRICT OFFICE : (Hulu Langat, Kuala Langat, Sepang) • STAKEHOLDERS : Universities (UKM/LESTARI,UPM, MMU etc), PNSB, Air Selangor, Sepang Goldcoast, GEC , Hulu Langat Community College, .
Recommended publications
  • Development of an Erosion Model for Langat River Basin, Malaysia, Adapting GIS and RS in RUSLE
    Applied Water Science (2020) 10:165 https://doi.org/10.1007/s13201-020-01185-4 ORIGINAL ARTICLE Development of an erosion model for Langat River Basin, Malaysia, adapting GIS and RS in RUSLE Md. Rabiul Islam1 · Wan Zurina Wan Jaafar2 · Lai Sai Hin2 · Normaniza Osman3 · Md. Razaul Karim2 Received: 4 April 2018 / Accepted: 30 March 2020 / Published online: 16 June 2020 © The Author(s) 2020 Abstract This study is aimed to predict potential soil erosion in the Langat River Basin, Malaysia by integrating Remote Sensing (RS) and Geographical Information System (GIS) with the Revised Universal Soil Loss Equation (RUSLE) model. In RUSLE model, parameters such as rainfall erosivity factor (R), soil erodibility factor (K), slope length and steepness factor (LS), vegetation cover and management factor (C) and support practice factor (P) are determined based on the input data followed by the spatial analysis process in the GIS platform. Rainfall data from 2008-2015 are collected from the 29 rain gauge stations located within the study area. From the analysis, the magnitude of RUSLE model obtained corresponding to the parameter R, K, LS, C and P factors is varied between 800 to 3000 MJ mm ha − 1 h− 1 yr− 1, 0.035–0.5 Mg h MJ− 1 mm− 1, 0–73.00, 0.075–0.77 and 0.2–1.00, respectively. Findings of this study indicates that based on the calculated RUSLE parameter values, about 95% of the Langat River Basin area have been classifed as a very low to a low erosion vulnerability. Findings of this study would greatly benefts a decision maker in proposing a suitable soil management and conservation practices for the river basin.
    [Show full text]
  • (Gis) Approach for Analyzing Channel Planform Change with Examples of Langat River, Malaysia
    ID:327 USE OF GEOGRAPHICAL INFORMATION SYSTEM (GIS) APPROACH FOR ANALYZING CHANNEL PLANFORM CHANGE WITH EXAMPLES OF LANGAT RIVER, MALAYSIA M.E. Toriman1; M.Mokhtar2; M.B.Gasim3; R. Elfithri2 & Nor Azlina A.B1 1School of Social, Development & Environmental Studies, FSSK, Universiti Kebangsaan Malaysia. 43600 Bangi, Selangor 2Institute of Environmental & Development (LESTARI), Universiti Kebangsaan Malaysia.43600. Bangi Selangor, Malaysia. 3School of Environmental Sciences and Natural Resources, Faculty of Sciences and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi Selangor Malaysia 4Fakulti Kejuruteraan Awam, Universiti Teknologi Malaysia, 81310 Universiti Teknologi Malaysia, Skudai Johor, Malaysia This article focuses on the Langat River Channel Planform changes in medium (25 to 100 years) and short time (over last few months to 25 years) scales using Geographical Information System analysis (GIS) involving the cross section and sinuosity analyses. Three sets of topographical maps for three different years (1969, 1976 and 1993) were digitized and rectified and type of changes for the non-stable reaches were defined by superimposing the digital maps of all dates. The results indicate that, middle stream is the most unstable reach followed by upstream which has a few unstable sub-reaches while the downstream shows no changes during the study period. Type of most of the lateral changes for upland reach was meander progression and for middle stream meander progression and avulsion construct most of changes. The middle stream of the channel was identified as the most unstable reach with an average 11.81% change in its sinuosity index. Meanwhile, the upland and downstream of the channel were behaving as more stable reaches with an average 6.92% and 8.47% changes in their sinuosity, respectively.
    [Show full text]
  • Amirudin Shari Said a Amirudin on Nov 30
    No let up in Services sector Keeping the travel Celebrating war with virus a rising star industry afloat the people’s monarch 5 7 10 8&9 FREE l DECEMBER 2020 EDITION l www.selangorjournal.my SELANGOR THE Selangor administration has outlined several measures to en- sure that the people have a con- tinuous supply of water. The ini- tiatives include to increase ground surveillance, use high-tech drones for monitoring difficult-to-access areas, and make amendments to the law to impose heavier penalties on offenders. Swift action by state agencies has also been instrumental in averting water cuts. Thirteen out of 21 re- ported incidents of pollution were intercepted before more damage was done. MORE ON PAGES 2to3 2 NEWS Selangor Journal l DECEMBER 2020 River diversion may be the remedy Hard to sniff out By NORRASYIDAH ARSHAD tects a pollution, we will stop the flow of the polluted river odour pollution SHAH ALAM - A pilot project to water immediately to avoid it divert river water during a pol- from entering the surface wa- lution incident is underway to ter intake of the water treat- ensure that users do not face ment plants (WTPs). water cuts. “Although the treatment State executive councillor plants are suspended, people for infrastructure and public will not have to worry because amenities Izham Hashim said this pilot project will operate water from existing reserve to keep supplying water,” he ponds will be temporarily said during a media briefing pumped to consumers while on Nov 26. the operations of water treat- Izham said the reserve ment plants are suspended.
    [Show full text]
  • Flood Risk Pattern Recognition by Using Environmetric Technique- a Case
    Jurnal Full Paper Teknologi FLOOD RISK PATTERN RECOGNITION BY USING Article history Received ENVIRONMETRIC TECHNIQUE: A CASE STUDY IN 25 February 2015 Received in revised form LANGAT RIVER BASIN 24 March 2015 Accepted Ahmad Shakir Mohd Saudia, Hafizan Juahirb*, Azman Azida, 1 October 2015 Mohd Ekhwan Torimana,c, Mohd Khairul Amri Kamarudina, Madihah Mohd Saudia,Ahmad Dasuki Mustafaa, Mohammad *Corresponding author Azizi Amrana [email protected] aEast Coast Environmental Research Institute, Universiti Sultan Zainal Abidin, Gong Badak Campus, 21300,Kuala Terengganu, Terengganu, Malaysia bFaculty Science and Technology, University Science Islam Malaysia, 71800, Nilai, Negeri Sembilan, Malaysia cSchool of Social, Development and Environmental Studies, Faculty of Social Sciences and Humanities, National University of Malaysia, 43600 Bangi, Selangor, Malaysia Graphical abstract Abstract This study looks into the downscaling of statistical model to produce and predict hydrological modelling in the study area based on secondary data derived from the Department of Drainage and Irrigation (DID) since 1982-2012. The combination of chemometric method and time series analysis in this study showed that the monsoon season and rainfall did not affect the water level, but the suspended solid, stream flow and water level that revealed high correlation in correlation test with p-value < 0.0001, which affected the water level. The Factor analysis for the variables of the stream flow, suspended solid and water level showed strong factor pattern with coefficient more than 0.7, and 0.987, 1.000 and 1.000, respectively. Based on the Statistical Process Control (SPC), the Upper Control Limit for water level, suspended solid and stream flow were 21.110 m3/s, 4624.553 tonnes/day, and 8.224 m/s, while the Lower Control Limit were 20.711 m, 2538.92 tonnes/day and 2.040 m/s.
    [Show full text]
  • Langat HELP River Basin Initiative in Malaysia
    3/29/2010 Langat HELP River Basin Initiative in Malaysia Prof. Dr. Mazlin Bin Mokhtar Dr. Rahmah Elfithri and Md. Abdullah Abraham Hossain Institute for Environment and Development (LESTARI) Universiti Kebangsaan Malaysia 43600, UKM BANGI, Selangor, Malaysia Langat River Batu 18 Kg. Pangsoon UKM Kg. Jugra Denkil 1 3/29/2010 What Makes Langat Unique? • Langat River Basin, Malaysia is recognized as one of the HELP Basins since 2004, initiated by the LESTARI, UKM. • Langat was classified as Evolving HELP Basin, out of 90 catchments from 56 countries in the world. • The selection has been made based on the international programme that is a catchment based activity which is interfacing scientific research with stakeholders needs. • Includes scientists, stakeholders, policy-makers, lawyers. • Provides options as against imposing solutions. • Providing/testing/implementing and improving solutions. • Sharing experiences across a global network of basins. • Geographical location. Integrated Water Resources Management To promote a process towards the vision of The Three Es by coordinated development and management of water, land and related resources, in order to maximize the resultant Economic and social welfare in an Equitable manner without compromising the sustainability of vital Ecosystems. The Four Dublin principles (1992) 1. Fresh water is finite and vulnerable resource 2. Participatory approach 3. Women play a central role 4. Water has economic value The Tools: The Three Pillars of management components: 1. Enabling Environment: Policy,
    [Show full text]
  • River Channel Change Assessment For
    Malaysian Journal of Civil Engineering 18(1) : 59-70 (2006) APPLICATION OF GIS FOR DETECTING CHANGES OF SUNGAI LANGAT CHANNEL Mohd Ekhwan Toriman1,*, Zulkifli Yusop2, Mazlin Mokhtar3, 4 Hafizan Juahir 1School of Social Development and Environmental Studies, Universiti Kebangsaan Malaysia, Bangi, 43600, Selangor 2Department of Hydraulic & Hydrology, Universiti Teknologi Malaysia, 81310, Skudai, Johor 3Institute for Environment and Development, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor 4Department of Environmental Science,Universiti Putra Malaysia, Serdang 43400, Selangor *Corresponding Author: [email protected] Abstract: Recent environmental developments have stimulated interests in the restoration and conservation of the Sungai Langat in Selangor both to protect against flooding and to maintain river bank stability. In order to support restoration and rehabilitation works of Sungai Langat, sufficient information on physical river characteristics are needed. The use of Geographical Information System (GIS) to map active channels and to categorised the reach according to sinuosity indices over time is encouraging. Total channel length in year 1996 reduced by about 16% from 1973. Avulsion and cut-off were observed at least at six stretches along the river. The sinuosity index (SINDX) varies from 0.61 to 2.31 in 1973 and 0.04 to 2.31 in 1996. At downstream, the channel tends to be more stable and straighter with SINDX < 2.5. This trend of river channel changes can be used as basis for evaluating river restoration works. Keywords: Restoration; Geographic Information System; Channel Changes; Sinuosity Index. Abstrak: Pembangunan alam sekitar masa kini telah menyuntik minat dalam pemulihan dan pemuliharaan Sungai Langat di Selangor khususnya dalam konteks kawalan banjir dan menstabilkan tebing sungai.
    [Show full text]
  • Map Asia 2003 Water Resources GIS Application in Evaluating Land Use
    Map Asia 2003 Water Resources GIS Application in Evaluating Land Use-Land Cover change and its Impact on Hydrological Regime in Langat River Basin, Malaysia* Noorazuan M. H School of Social, Development & Environment, UKM Bangi (now on study leave at School of Geography, University of Manchester, UK) Ruslan Rainis Geoinformatic Unit, Geography Section, School of Humanities Universiti Sains Malaysia, 11800 Penang. E-mail: [email protected] Hafizan Juahir, Sharifuddin, M.Zain Department of Chemistry, Universiti Malaya, KL Nazari Jaafar Department of Geography, Universiti Malaya, KL Abstract GIS-based multi-temporal land use data provides a historical vehicle for determining and evaluating long term changes of land use due to urbanization. Along with the concurrent daily streamflow and precipitation records, the impact of land use change on the rainfall-runoff relationships has been explored in Langat River Basin. The basin is located at southern of the heart of Malaysia i.e. Kuala Lumpur, mentioned to be the most rapid semi-urban basin that experienced land use and land cover changes due to the onslaught of development. This article will highlights the evaluation of land use change result and how this outcome could affects the rainfall-runoff relationships. The study revealed that the landscape diversity of Langat significantly change after 1980s and as the result, the changes also altered the Langat’s streamflow response. Surface runoff has increased from 20.35% in 1983-88 to about 31.4% of the 1988-94 events. Evidence from this research suggests that urbanisation and changes in urban-related landuse- landcover (LULC) could affect the streamflow behaviour or characteristics.
    [Show full text]
  • Preliminary Study of Sg Serai Hot Spring, Hulu Langat, Malaysia
    Water Conservation and (WC )1(1) (2017) 11-14 Management M Contents List available at Water Conservation and Volkson Press (WC ) Journal Homepage: https://www.watconman.org/Management M Preliminary Study of Sg Serai Hot Spring, Hulu Langat, Malaysia Alea Atiqah Bt Mahzan, Anis Syafawanie Bt Ramli, Anis Syafiqah Bt Mohd Abduh, Izulalif B. Izhar, Mohd Zarif B. Mohd Yusof Indirakumar, Amgad Abdelazim Mohamed Salih, Anas Syafiq B. Ahmad Jahri, Ong Qing Wei Department of Geology, Faculty of Science, University of Malaya 50603 Kuala Lumpur, Malaysia This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited ARTICLE DETAILS ABSTRACT Article history: The study was conducted to do preliminary review of geology & water quality at Sg Serai hot spring, Hulu Langat, Selangor, Malaysia. Langat River basin can be divided into 3 distinct zones. The first can be referred to as the Received 12 August 2016 mountainous zone of the northeast corner of Hulu Langat district. The second zone is the hilly area Accepted 12 December 2016 characterised by gentle slopes spreading widely from north to the east in the middle part of Langat basin. Available online 20 January 2017 The third zone is a relatively flat alluvial plane located in the southwest of Langat Basin. Water samples, SSP2 and SSW2 are polluted, with an anomalously high reading of fluoride. Fluorosis has been described as an Keywords: endemic disease of tropical climates, but this is not entirely the case. Waters with high fluoride concentrations occur in large and extensive geographical belts associated with a) sediments of marine origin in mountainous areas, b) Preliminary report, geology, water quality, Langat basin, flouride volcanic rocks and c) granitic and gneissic rocks; resulting the high concentration of fluoride in water samples.
    [Show full text]
  • Environmentasia
    EnvironmentAsia Available online at www.tshe.org/EA The international journal published by the Thai Society of Higher Education Institutes on Environment EnvironmentAsia 3(special issue) (2010) 20-31 Hydrological Trend Analysis Due to Land Use Changes at Langat River Basin Hafizan Juahir a, Sharifuddin M. Zain b, Ahmad Zaharin Aris a, Mohd Kamil Yusof a, Mohd Armi Abu Samah a and Mazlin Bin Mokhtar c a Department of Environmental Sciences, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. b Department of Chemistry, Faculty of Science, Universiti Malaya, 56000 Kuala Lumpur, Malaysia. c Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia Abstract This present study was carried out to detect the spatial and temporal change (1974-2000) in hydrological trend and its relationship to land use changes in the Langat River Basin. To obtain a clear picture of the hydrological parameters during the study period, rainfall data were analyzed. With the help of GIS and non-parametric Mann-Kendall (MK) statistical test the significance of trend in hydrological and land use time series was measured. Trend analyses indicated that a relationship between hydrological parameters namely discharge and direct runoff and land use types namely agriculture, forest, urban, waterbody and others was evident. This analysis indicates that rainfall intensity does not play an important role as a pollutant contributor via the rainfall runoff process nor does it directly influence the peak discharges. Land use shows tremendous changes in trend surrounding Dengkil station compared a little changes surrounding Lui station. Mann-Kendall test of trend shows an increasing trend (p-value<0.01) of annual maximum-minimum ratio for Dengkil station, while no significant trend is observed for Lui station.
    [Show full text]
  • Urban Land Use Change and the Langat Basin Ecosystem Health
    PLANNING MALAYSIA Journal of the Malaysian Institute of Planners (2004) II, 51-68 URBAN LAND USE CHANGE AND THE LANGAT BASIN ECOSYSTEM HEALTH Shaharudin ldrus Abdul Samad Hadi Institute for Environment and Development (LESTARJ) UNIVERSITJ KEBANGSAAN MALAYSIA (UKM) Abstract The paper discusses over four decades of urban land use changes in the Langat River Basin in response to rapid development impulses that flowed from the more developed Klang Valley where Kuala Lumpur, the Malaysian capital city is situated. It proceeds to look into the impact of those changes on the ecosystem health of the basin. Federal development policies, strategies, programs and activities have transformed the basin from an industrial agricultural basin into an urbanized area. Being contiguous to the Klang Valley, the basin rose over the decades to be a choice location for not only foreign direct investment to produce manufactured products for export but also services and educational. The paper also discusses the status of the Langat Basin ecosystem health. The change to the land use has indeed impacted on the basin ecosystem health. Using ors, land use changes in the basin over the decades were analysed to reveal the persistent direction of change. It is clear that the trend of land use change in the Langat Basin is the conversion from one type of land use to developing urbanised and full urban areas. What is implied by the changes are indicators that can be derived to show the sustainability of the ecosystem in the Langat Basin such as river flood, mud flood, land slide, etc. Key words: Langat River Basin, Ecosystem Health, Land Use, ors, INTRODUCTION This paper perceives that economic, social and administrative driving forces have impacted on the Langat Basin land use.
    [Show full text]
  • Investigating the Status of Cadmium, Chromium and Lead in the Drinking Water Supply Chain to Ensure Drinking Water Quality in Malaysia
    water Article Investigating the Status of Cadmium, Chromium and Lead in the Drinking Water Supply Chain to Ensure Drinking Water Quality in Malaysia Minhaz Farid Ahmed 1,* , Mazlin Bin Mokhtar 1,*, Lubna Alam 1, Che Abd Rahim Mohamed 2 and Goh Choo Ta 1 1 Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia (UKM), UKM Bangi 43600, Selangor, Malaysia; [email protected] (L.A.); [email protected] (G.C.T.) 2 School of Environmental and Natural Resource Sciences, Universiti Kebangsaan Malaysia (UKM), UKM Bangi 43600, Selangor, Malaysia; [email protected] * Correspondence: [email protected] (M.F.A.); [email protected] (M.B.M.); Tel.: +603-8921-3894 (M.F.A.); +603-8921-4149 (M.B.M.) Received: 1 August 2020; Accepted: 3 September 2020; Published: 23 September 2020 Abstract: Prolonged persistence of toxic cadmium (Cd), chromium (Cr) and lead (Pb) in the aquatic environment are due to its nonbiodegradable characteristic. A few studies have reported higher concentrations of these metals in the transboundary Langat River, Malaysia. This study determined the spatial and temporal distributions of Cd, Cr and Pb concentrations (2005–2015) in the Langat River along with assessing the status of these metals in the drinking water supply chain at the basin. Water samples were collected once in 2015 from the drinking water supply chain, i.e., from the river, treated water at plants, taps and filtration water at households. Determined mean concentrations of Cd, Cr and Pb by inductively coupled plasma mass spectrometry in the Langat River were within the drinking water quality standard of Malaysia and the WHO, except for the Pb (9.99 1.40 µg/L) ± concentration, which was at the maximum limit, 10 µg/L.
    [Show full text]
  • Environmentasia
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Directory of Open Access Journals EnvironmentAsia Available online at www.tshe.org/EA The international journal published by the Thai Society of Higher Education Institutes on Environment EnvironmentAsia 3(special issue) (2010) 20-31 Hydrological Trend Analysis Due to Land Use Changes at Langat River Basin Hafizan Juahir a, Sharifuddin M. Zain b, Ahmad Zaharin Aris a, Mohd Kamil Yusof a, Mohd Armi Abu Samah a and Mazlin Bin Mokhtar c a Department of Environmental Sciences, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. b Department of Chemistry, Faculty of Science, Universiti Malaya, 56000 Kuala Lumpur, Malaysia. c Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia Abstract This present study was carried out to detect the spatial and temporal change (1974-2000) in hydrological trend and its relationship to land use changes in the Langat River Basin. To obtain a clear picture of the hydrological parameters during the study period, rainfall data were analyzed. With the help of GIS and non-parametric Mann-Kendall (MK) statistical test the significance of trend in hydrological and land use time series was measured. Trend analyses indicated that a relationship between hydrological parameters namely discharge and direct runoff and land use types namely agriculture, forest, urban, waterbody and others was evident. This analysis indicates that rainfall intensity does not play an important role as a pollutant contributor via the rainfall runoff process nor does it directly influence the peak discharges.
    [Show full text]