China National Aero Technology International Corporation (CATIC)
Under this assignment, SKILLS provided the below services:
Collection of Details on existing canals or drainage paths such as sizes, normal flow, catchment area etc.
Calculation of HFL for return periods 5 years, 10 years, 25 years, 50 years and 100 years for the project area drainage paths.
Designing flood frequency for the each type of drainage structure.
Preparation of Inundated area maps for all return period flood levels in all river basins within the selected project area.
Preparing Drainage structure proposals for the selected project area including viaduct proposals, bridges, culverts and drains including flow directions, designed spans, heights, and recommended soffit levels, freeboard and invert levels.
Providing Hydrological technical justification for selection of viaducts for the selected project area instead embankment filling.
Providing Recommendations for minimum freeboard to road pavement layer.
Recommending maximum and minimum flow velocity for drainage structures.
Preparing Sample design calculation sheet for each type of cross drainage structure to verify sizes of structure.
Listing the Parameters and coefficients used for design calculations.
Preparing Design Hyetograph for all return periods used for the analysis.
Providing Basic Guide lines for bend treatments, end treatments, slope protections, velocity barriers, friction blocks and cascaded sections of drainage structures.
Preparing Design guidelines and references for the hydrology report.