Storm Drainage System
A storm water drainage system should be designed to collect and convey run-off generated within a catchment area during and after rainfall events, for safe discharge into a receiving watercourse or the sea. The magnitude of peak flows that have to be accommodated will depend primarily on the intensity of rainfall and the size, topography, soil type, configuration and land use of the catchment.
ASSOCIATE ENGINEERS’ expertise covers all aspects of storm water for urban flood preventions. The major disciplines covered are:
- Storm water collection systems
- Storm Water Trunk Mains
- Storm water Pumping Stations
- Lake and Water Bodies Rejuvenation
We follow a 5 step process for designing storm water drainage systems:
1. Data collection: This involves assembling and reviewing data and background information. The types of information to consider include:
- Watershed, land use (existing and expected future), and soils maps,
- Flood histories and high water mark elevations,
- Data for existing drainage systems,
- Utility plans and descriptions,
- Existing right-of-way information, and
- State, and local regulations
2. Agency coordination. This may involve coordination with internal offices as well as government and work executing agencies.
3. Preliminary concept development: This involves preliminary layout for the proposed storm water drainage system.
4. Concept refinement (hydrologic and hydraulic design): This involves the process of moving from preliminary to final design. This consists of:
- Computing runoff based on drainage areas determined by the preliminary layout.
- Refining inlet location and spacing.
- Sizing system components
- System layout (schematic)
- Computing and reviewing the hydraulic grade line and generating hydraulic models.
- Revising and recalculating until a satisfactory storm water drainage system is achieved.
5. Finalizing design documentation. This involves finalizing documentation for the design files and construction plans.
Darpan circle, Navrangpura,
Ahmedabad-380014