Urban storm water drainage systems have got priority in India only after drinking water supply and sewerage projects in the majority of the cases.
Planning & Investigation of Storm Water
1. Data Collection, Survey and Investigation
Physical Characteristics : Topographical details including the slope of catchment / contributing area and outfall point
Rainfall Characteristics : Rainfall data for the last 30 years or more Waterway Characteristics : The capacity of water receiving the body and its HFL
2.Planning of Storm Water Drainage Systems
Demarcation of Catchment and Planning Areas While planning storm water drainage system for the city, the catchment area should be demarcated based on natural watershed boundaries (Ridges / Valleys/ Waterways) to take into account storm water runoff.
Hydraulic Design of Storm Water : rainfall data should be collected and analyzed as mentioned in Chapter 3, and runoff estimation to be carried out for different zones/subzones for corresponding stretches of drain alignment as given in CPHEEO manual Chapter 4. The runoff from the adjacent catchment area as said above should also be taken into account while designing the storm water drains.
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Urban Infrastructure and Network Study notes for M. plan Sem-III
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