CHAPTER 14 - Iskandar Malaysia

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SECTION B PLANNING AND IMPLEMENTATION No River Location Affected Flooding people 4. Sungai Plentong • Kg. Plentong Baru 120 - D. Application of MASMA The MASMA Manual for run-off design promotes environmentally friendly solutions and should be made applicable to any development in Johor Bahru. 5. Others • Kg. Oren • Jalan Air Molek • Kg. Mohd. Amin • Rumah Murah Melati, Ulu Tiram 500 Every 2 years TOTAL 8,966 Sources: Laporan Banjir Disember 2001, JPS Johor & Media E. Rehabilitation of Major River and Straits of Johor Major rehabilitation of rivers such as Sungai Skudai and Sungai Tebrau should be carried out to prevent erosion and siltation caused by the construction of major embankment work, to improve water quality. This work should also be carried out along the coastal areas of SJER stretching from east to west. The main reason of flooding in this area is due to insufficient capacity to receive the additional discharge. Some of the rivers meander and as a result, siltation easily occurs at the river mouth, causing flood. The situation become worse when there is heavy rain and high spring tide. The rapid pace of development within the district of Johor Bahru also contributes to the flooding at the river basin area, as insufficient drainage causes blockages and flash flood. Illegal Squatters Within The Reserve of Sungai Skudai Example of an Embankment Work The presence of illegal squatters within the river reserve areas, especially at Sungai Skudai and Sungai Tebrau, can also contribute to flooding, as it impedes maintenance work by the drainage department. In addition this results in unpleasant views along the rivers and poor water quality due to the disposal of domestic waste by the illegal squatters. Figure 14.4: Application of Sustainable Drainage Grass area Absorbs rain water into the ground C. New Target of Projection and Commitment The rate of land conversion in SJER is quite high. As sites cleared for development, this may result in an increase in surface run off and peak flows that can easily cause flooding; especially at the river estuary. Many rivers have been narrowed due to land development and subsequent Rain water harvesting Gravel Trench’ Soakaway Pit’ Porous road surface Swale Gross pollutant Trap (GPT) Traps waste Retention Pond and ‘Wetland’ Retain surface run-off water water earthworks, and may need to be widened and maintained. In relation to this there must be sufficient river reserve to ensure effective river management. The reserve could be used for recreational purposes and Source: SJER CDP 2025 to provide more green areas. 14 - 12
URBAN INFRASTRUCTURE CHAPTER 14 | PART 4 F. Retention and Detention Pond The application of MASMA standards in SJER will result in a greater emphasis on providing retention and detention ponds or lakes to improve water quality, minimize flooding and improve the quality of the environment. The water in the ponds or lakes can be used to dilute rivers especially during dry season. G. Installation of Silt Traps UI 7 : UI 8 : UI 9 : KEY DIRECTION The need for sustainable sewerage system in SJER. All new housing development to be connected to the ecofriendly centralized sewerage system (CSS). All land made available for Sewerage Treatment Plants must be primarily reserved and designated for public purposes. Silt traps should also be constructed in many tributaries especially at the new development areas. H. Guidelines for Sustainable Storm Water Drainage & Flood Mitigation • Install trash racks or screens to trap debris/litter; • Allow for buffer strips and grass swales to protect water source from contamination by nearby development precinct.; A. Existing Sewerage System Sewerage waste in the District of Johor Bahru comes from both public and private sewerage plants, individual septic tanks (IST), primitive systems (villages and illegal squatters) and untreated discharge from households. As Indah Water Konsortium is only responsible for maintaining public treatment plants, many other forms of treatment plants are currently not properly maintained. • Install GPT and oil/grease traps in major drains at strategic locations; • Install series of bio-retention /infiltration porous systems for storm water to get back into the ground; • Install buried drainage pipes to cater for major storm; and • Install water collection equipment, storage and pump for recycle storm water as non-potable water. Sewerage Treatment Plant at Taman Suria Johor Bahru For land under development which has a gradient of less than 30º but greater than 25º, geo-technical analysis, analysis on contour and drainage pattern and an EIA study should be included. All hill slopes have to be closely turfed after cutting. 14.9 Sewerage The Department of Sewerage Southern Region (JPP) is the government agency responsible for the management of sewerage in the District of Johor Bahru. Meanwhile operation and maintenance services is carried out by a concession company, Indah Water Konsortium (IWK). The process of taking over maintenance work has been carried out progressively by JPP since 1995. Untill now only the areas under the City Council of Johor Bahru and areas outside of Municipality Councils have not been taken over. 14 - 13
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CHAPTER 14 - Iskandar Malaysia

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