What motivated you to choose this specific topic and location?
While we’re doing our research, we found out that people in Saint Jude Phase 2 have been
struggling with floods that damage their homes. That really drove us to roll up our sleeves, map
out the flow of rainwater, and design a drainage system that actually works. We picked this
tucked-away neighborhood precisely because it tends to slip under the radar of the local
authorities.
What are the main objectives of your study?
We’re doing this study to come up with a practical drainage solution for Saint Jude Phase 2 in
San Fernando, Pampanga. By looking closely at how rainwater runs off in the neighborhood,
we’ll figure out the right size and shape for the drains—so water flows away smoothly, flooding
is less of a worry, everyone stays safer, and the community as a whole benefits.
Why is flood risk assessment important for St. Jude Village?
A thorough flood risk assessment is essential. By running detailed calculations—such as peak
storm rainfall, runoff rates, and surface flow speeds—we can pinpoint the exact drainage
capacity required. This careful, data-driven approach means our design isn’t just a rough
estimate; it’s a dependable safeguard that really helps keep homes safe.
How does your study contribute to existing knowledge or local disaster mitigation efforts?
How did you collect and validate your rainfall or topographic data?
We pulled rainfall data from reputable online sources, then headed out to the site with tape
measures to take manual readings. We also cross-checked slopes and other parameters against
online databases to make sure everything lines up.
What design storm or return period did you consider for your drainage system design?
the return period we used is 4 years return period.
What were the key findings from your runoff analysis?
Our runoff analysis turned up two key figures:
Peak runoff: 0.195 m³/s, which aligns with what you’d expect during flooding events.
Maximum depth flow: 0.199 m³/s, representing the highest measured runoff intensity.
In short, these numbers give us a clear target for sizing our drainage system so it can handle the
worst-case storm without letting water levels get out of hand.
What factors contributed most to flood risk in the area?
Our survey showed that most people believe the flood risk in Saint Jude Village stems from
clogged drains, flawed designs, and poor upkeep.
Did you consider climate change or future rainfall scenarios?
We made sure to factor climate change into our design. By combining historical rainfall data
with projections of more intense storms, we’ve sized the drains to handle not just today’s
monsoon but the heavier, more unpredictable downpours we’re likely to see in the future. This
way, Saint Jude Phase 2 stays protected no matter how the weather shifts.
How did you determine the required capacity for the drainage system?
By using the Peak runoff analysis and manning’s equation with the given data we’ve collected
What materials or structural components did you consider in your drainage design?
Concrete for manning’s roughness coefficient is the component we considered for determining
the cross-sectional area of the drainage.
What methods did you use to perform the runoff analysis?
When calculating peak runoff, we used the rational method.
When we calculate the Drainage Cross-sectional area, we use the manning’s Equation
We calculated the maximum flow of depth by using the mannings equation
Calculating the Cross Sectional Area by Manning’s Equation
Calculations for Cross-sectional area with factor of safety 1.3
