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The comparison between the combined and separate systems(1 pipe and 2 pipe also same)
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The Combined System The Separate System
1)this system is suitable for narrow lanes 1)It is difficult to use this system in the narrow lanes as more space is required
2)In the regions having heavy rainfall this system is most suitable 2)In the regions having low yearly rainfall this system proves to be suitable
3)The total cost of construction is higher than the separate system 3)As between the two sets of sewer lines one is to be laid underground while the storm water is carried through the open drains the total cost is less
4)The settlements having low rainfall this system is suitable. 4)The settlements having heavy rainfall is suitable.
5) It needs to pump the storm water together with sewage. 5)It needs sewage pumping due to relief features.
6) As the quantity of sewage and storm water is huge. 6)As the quantity of sewage is to be treated in less.
7) The cost of treatment is high. 7) The cost of treatment is low.
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