الفهرس 
Hydrological AnalysisOnly 14 pages are availabe for public view
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Abstract
The objective of a storm drainage design, is to provide a safe travel of vehicles and pedestrians as well as protect properties from being damaged during a storm event. The storm water runoff should be collected by the storm drainage system, and then conveyed along the right of way through a conveyance system, to be discharged at a disposal point without being destructive.
In order to achieve these objectives, the planning and coordination of storm drainage systems must begin in the early phases of urban planning. Integrating urban plan and storm drainage planning results in successful development of an effective, efficient and economical storm drainage system.
When designing urban storm drainage systems which include catch basins, manholes, pipes, etc, these systems are designed to convey runoff from storms of high frequencies (2 to 10 years). Whereas, main collector drainage systems comprising of open channels, natural streams, valleys, and ponds are designed to accommodate runoff from less frequent storms (100 years).
During 100-year rainfall event, the drainage system is not capable to divert the incoming hydrograph to the main collector, and the storm drainage network can become surcharged and flooding will occur. Therefore, an accurate estimation of the flow discharging into a main collector is needed in extreme rainfall events to attain a value engineering design
A methodology was investigated to realistically estimate the flow at a collector resulting from coupled flow (subsurface/surface) which results when overland flow dynamically interacts with the subsurface flow in the drainage system, adopting one-dimensional (1D) model coupled with a two-dimensional (2D) surface flow model (1D/2D).
A case study is used to investigate different analysis techniques applied on multiple storm drainage systems while assigning various rainfall events, which can be briefly displayed as follows:
• Discharging storm water by surface runoff to different discharging points using different geometrical road cross sections through unsteady state analysis while applying a 10-year rainfall event.
• Discharging storm water runoff inside the project area through a positive system (manholes & pipes) while applying both steady state and unsteady state analysis via 10-year and 100-year rainfall event.
• Discharging storm water runoff inside the project area through a positive system (manholes & pipes) while applying linked 1D/2D analysis model 100-year rainfall event.
The results of the above-mentioned techniques were examined, investigated and compared, allowing guidance for design engineers to choose the most economical techniques and systems, furthermore presenting ways to use 1D/2D models and how they can be used to simulate different scenarios, and solving problems as well as choosing the most economical solution.