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DRAINAGE&SEWERAGE SYSTEM (DRAINAGE SYSTEM (Drainage Scheme (Combined…
DRAINAGE&SEWERAGE SYSTEM
DRAINAGE SYSTEM
Surface Water
Collect from surface(roofs),consider to be clean&can discharges direct into&approval water course of soakaway
Foul / Soil water
Contaminated by domestic/trade waste&require treatment to render it clean before it can be discharge into approved water course
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Drainage Scheme
Combined system
1 sewer, economical to install but has high processing costs
Seperate System
2 sewer(for the conveyance of foul sewage only)&(for the rain water), expensive to install but reduce volume&treatment costs
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SEWAGE TREATMENT
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Manhole
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Access to the sewers,water,electric,telephone&natural gas facilities
Located at changes in size,slope/direction
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