Phase VII · FE Civil Academy
Water Resources and Environmental Engineering
Quantify, convey, store and treat water for communities and the environment.
Topic mastery
0%
Accuracy
0%
Questions attempted
0
Average pace
0 s
Practical scenario
A 42-acre watershed drains to a proposed detention basin. You must compute peak runoff, size the outlet culvert and check the channel capacity.
Why this matters
This is the largest topic block on the FE Civil exam and the core of most water-resources capstone projects.
Concept explanation
- The rational method estimates peak runoff for small watersheds from rainfall intensity, area and a runoff coefficient.
- Manning's equation gives uniform open-channel flow from slope, roughness and geometry.
- Detention storage attenuates the peak by releasing inflow more slowly than it arrives.
- Treatment processes are sized on detention time, loading rate and removal efficiency.
Unit guidance
- Write units on every substituted value.
- Cancel units symbolically before evaluating numbers.
- Confirm the result unit matches the quantity you were asked for.
Handbook navigation
- Open the Water Resources and Environmental Engineering section of the handbook.
- Search the term "open-channel flow" rather than scrolling.
- Note the equation number so you can return to it quickly.
Calculator guidance
- Confirm angle mode before any trig entry.
- Store intermediate values in memory instead of re-keying rounded numbers.
- Round only at the final answer.
FE strategy
- For a full circular pipe, R = D/4 — memorize it.
- Check whether intensity corresponds to the time of concentration given.
Conceptual example
A conceptual water resources and environmental engineering item will ask which quantity increases, decreases, or stays the same when one input changes. Reason from the governing relationship, not from memory of a numeric answer.
Common mistakes
- Using area in square feet instead of acres in the rational method.
- Using 1.0 instead of 1.486 in Manning's equation for US units.
- Confusing hydraulic radius with pipe radius.
Guided practice
- Work the first worked example with the solution visible.
- Re-solve it closed-book and compare every step.
- Explain the unit cancellation out loud.
Independent practice
- Complete a 10-question Water Resources and Environmental Engineering quiz in practice mode.
- Classify every miss by error category.
- Re-test the missed subtopic within 48 hours.
Summary
- Q = CiA for peak flow, Manning for channel capacity.
- R = A/P, and R = D/4 for a full pipe.
- Detention attenuates but does not remove volume.
Capstone application: Hydrology, drainage and treatment modules in the Design Studio.