Code of practice on surface water drainage


Drainage Planning Requirements



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COP Surface Water Drainage 7th Ed Add. 1
Drainage Planning Requirements
4.1 Drains Not to be Interfered with
12 4.2 Drainage Affecting Other Premises
12 4.3 Closed Drainage System
12 4.4 Internal Drainage System
12-13 4.5 Common Drain
13 4.6 Improvements to Existing Drain
13 4.7 Structure Over Roadside Drain/Outlet Drain
13 4.8 Hydraulic & Structural Calculations
13-14 4.9 Drainage for Underground Facilities
14 4.10 Drainage at Reclaimed Land
15 4.11 Outfall Structure for Drain Connecting to the Sea
15 5
Structures Within or Adjacent to Drain/Drainage Reserve
5.1 No Structure within Drain/Drainage Reserve
16 5.2 Drain Connection within Drainage Reserve
16 5.3 Embankments and Structures adjacent to Drain/Drainage Reserve
16-17 5.4 Structure Within/Across Drain/Drainage Reserve
17-18 5.5 Services Within and/or Across Drain/Drainage Reserve
18-19 6
Requirements for Construction Activities
6.1 General Requirements
20 6.2 Laying and Diversion of Services
21 6.3 Earth Control Measures (ECM)
21-24 6.4 Earthworks
25 6.5 Road Works
25 6.6 Reclamation Works
25

VI
PART II
DESIGN REQUIREMENTS




7
Drainage Design and Considerations
7.1 Computation of Peak Runoff
27-29 7.2 Computation of Discharge Capacity
30 7.3 Design Considerations
31

8
Integration of Adjacent Watercourses with Developments and ABC Waters Design
Features within Developments
8.1 Integration of Adjacent Watercourses with Developments
32 8.2 Integration of ABC Waters Design Features within Developments
32-33

9
Drainage Structures and Facilities
9.1 Drain and Culvert
34 9.2 Transition
34 9.3 Curves and Bends
34 9.4 Sump for Drain Intersections
34 9.5 Drain Connection to Existing Drain
34 9.6 Maintenance Access for Drainage Reserve
35 9.7 Markers along Edge of Drainage Reserve
35 9.8
Drop-inlet Chambers, Inlet Openings and Slot-Outlets
35 9.9 Safety Railings
35 9.10 Rungs in Drains
35 9.11 Grating over Closed Drain/Culvert
36 9.12 Entrance Culvert/Crossing
37 9.13 Live Loads on Drains
37

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