CHAPTER 14 - Iskandar Malaysia

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SECTION B PLANNING AND IMPLEMENTATION H. Water Supply Master Plan ▼ Development Option To overcome the projected water shortage, new sources need to be found and new treatment plants need to be developed. Based on the projected increase in demand, a treatment plant with a capacity of 100 million litres per day should be built to meet demand for water in 2025. Other alternatives such as rainwater harvesting and exploitation of underground water resources should be explored. 14.7 Water Resource Management and Alternative Sources SJER will adopt an integrated water management system where water supply and use will be viewed as an integrated cycle. Sources of water, which include underground water sources, rivers, water catchments area, lakes and rainwater, are to be is conserved whilst wastewater from sewerage treatment plants and drainage systems is to be recycled for suitable purposes. Figure14.1: Concept of Integrated Water Management KEY DIRECTION UI 5 : Sustainable use of water resources i.e implementing measures for more efficient use of water and by encouraging water recycling and rainwater harvesting A. Water Sources Apart from conventional water supply for domestic use from public distribution system by relevant agency, other potential sources of water need to be exploited, in particular, rainwater. Guidelines for incorporation of rainwater harvesting in individual buildings have been formulated. B. Rainwater collection and water recycling Rainwater is collected from downspouts connected to the roof gutters of a building. A simple device called a roof washer diverts the initial flow of the rainfall into a storage tank. Table 14.12: Projected Water Resources From Rainwater harvesting Pipe Water from Water supply Agency (SAJ) Rainwater Recycled Water/ Grey Water Year 2003 2005 2010 2015 2020 2025 Rainwater Harvesting (mld) 18.7 23.0 26.2 32.5 40.7 51.0 Source: SJER CDP 2025 DOMESTIC USE Drinking Water Kitchen Use Bathing Washing DOMESTIC USE Bathing Washing Toilet FLushing NON-DOMESTIC USE Gardening Municipal Landscaping Car Washing DOMESTIC USE Toilet Flushing NON-DOMESTIC USE Gardening Municipal Landscaping Car Washing Water Use Water Sources Waste Water Sewerage Treatment Plant Drains, Retention Ponds and Canal System River System Figure 14.2: Use of Gutter for Rainwater Collection in Residential Building Gutter to to collect collect rainwater rainwater Gutter to collect rainwater Gutter to collect rainwater Source: SJER CDP 2025 Source: SJER CDP 2025 14 - 8
URBAN INFRASTRUCTURE CHAPTER 14 | PART 4 Figure 14.3: Concept of Rainwater Harvesting For Residential Building Location Usage Q Depth (m) IKBN Skudai D 10.00 75.00 Gutter to collect rainwater Rainwater distribution pipe for non-drinking use such as gardening and toilet flushing. Water main for domestic use from water authority reticulation system Source: SJER CDP 2025 Water tank for domestic water supply from water authority Collection pipe from gutter to rainwater storage tank Rainwater storage tank Kg. Seri G. Pulai D 10.00 104.00 Kelab Golf DiRaja D 1.00 30.00 Kg. Sg. Tiram D 5.00 90.00 Kg. Pulai D 5.00 35.00 Kg. Ulu Choh D 5.00 130.00 TOTAL 123 Source: SJER CDP 2025 D. Wastewater The drainage system and the sewerage treatment plant are two sources of wastewater. Surface run-offs and treated effluent from sewerage treatment plants shall be disposed in the river systems of the SJER and can be used as a water source particularly for non-domestic uses such as municipal landscaping and gardening. C. Ground Water Within the study area ground water is projected to represent only 0.2% of total water supply in the year 2025. Nevertheless, it is important, particularly for the drinking water industry, Table below shows the location and capacity of ground water. Table 14.13: List of Tube Well in SJER Location Usage Q Depth (m) Kulai Besar Oil Mill D 10.00 8.00 Kulai Besar Oil Mill D 10.00 8.00 As such, it is paramount that treated effluent discharge into the river system is properly managed and water quality of rivers are maintained to the required standards. E. Construction Cost Estimates of the cost of developing the water supply system are based on current year, 2006. The cost in Zone 1, MBJB is expected to be higher than that of other zones. The cost of the water supply infrastructure is summarised in the Table 14.14. Kulai Besar Oil Mill D 10.00 7.80 Larkin Industrial I 10.00 163.00 Larkin Industrial I 10.00 160.00 Kulai Evegreen MW 5.00 200.00 Ocean, U. Tiram MW 6.00 115.82 Ocean, U. Tiram MW 1.00 30.4 Kg. Murni Jaya D 5.00 104.00 Kg. Kuala Kabung D 5.00 124.00 Kg. Air Manis D 5.00 110.00 SM Senai D 10.00 93.00 14 - 9
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CHAPTER 14 - Iskandar Malaysia

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