Design Proposal of a Drainage System in Sto. Domingo, Minalin, Pampanga using Storm Water Management Model (SWMM) as Analytical Tool for Flood Mitigation

Flooding is a global challenge that impacts numerous places and regions across the globe and stands
as one of the most catastrophic natural phenomena worldwide. With this persistent issue showing a
significant barrier to achieving SDG 11: Sustainable Cities and Communities, this study aims to determine
several factors which cause prolonged flooding to Sto. Domingo Minalin, Pampanga and presents a design
proposal of a drainage system with the help of Stormwater Management Model (SWMM). The
Stormwater Management Model (SWMM) is an analytical tool which simulates rainfall patterns and
shows how nodes, junctions and outfalls will react during a simulation of rainfall pattern. Hydrology
Analysis was first applied to the study area through Curve Number (CN). Curve Number is one of the
most efficient in getting the amount of rainfall in a particular area. Through this method, we can obtain our
Peak Runoff (Qp) which is crucial in designing a drainage system. Hydraulic Analysis will follow as we
determine the design canal size in the area. The results show that flooding can be caused by outdated
infrastructures, changes in landscape and elevation, urbanization and impervious surfaces, and technical
and maintenance issues. If these problems were not addressed, flood risk will intensify and cause
significant damage to quality of life, economic stability, health and overall productivity of an area. The
proposed design went simulation with three significant typhoons, all of which had significant impacts on
the area. Finding shows that the proposed drainage system is adequate if subjected to these typhoons.
Simulation shows that water flow velocity is less than 1.5 m/s - 2 m/s, and there are no signs of node
flooding during these simulated events.