BMPs
Select and size a treatment train of stormwater best management practices for the site.
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Water Resources · Watershed hydrology, stormwater, channels, culverts, networks and hydraulic structures.
Deliverable: Stormwater BMP treatment train design with sizing and maintenance plan.
Minimum tables, figures and equations for BMPs
Tables — at least 7
- Table — trial sections or sizes considered, with the capacity of each and the selection decision
- Table — final selected geometry for every element: dimensions, thickness, grade, spacing, elevation
- Table — inlet, pipe, culvert and outlet sizing with slope, capacity and headwater depth
- Table — ultimate limit state check summary: demand, capacity, ratio, pass or fail, governing clause
- Table — serviceability check summary: deflection, crack width, settlement, freeboard or velocity against its limit
- Table — factors of safety achieved against the factor required, per failure mode
- Table — pre- versus post-development peak flows by design storm
Figures — at least 5
- Figure — free body diagram of each isolated element, fully labelled with loads, reactions, dimensions and axes
- Figure — shear and moment (or pressure and velocity) diagrams for each force-carrying element
- Figure — dimensioned section or plan of each designed element
- Figure — capacity versus demand plot, interaction diagram, or rating curve as applicable
- Figure — hydraulic grade line and energy grade line profile
Equations — at least 8
- Equation — equilibrium equations written out for each free body (sum of forces and sum of moments, or continuity and energy)
- Equation — the internal force relations V(x) and M(x), or the momentum/thrust relation, used to compute each element's demand
- Equation — the resulting demand at the critical section of each element, with numeric substitution
- Equation — the capacity expression for each element type, shown with full numeric substitution and units
- Equation — the sizing criterion that sets the final dimension (for example required area, depth or diameter)
- Equation — each limit state check written as demand over capacity with numbers substituted
- Equation — the factor of safety calculation for each failure mode checked
- Equation — outlet scour velocity and riprap sizing check
Number every table and figure (Table 4.x, Figure 4.x), caption it, and refer to it by number in your text. Number displayed equations and show the substitution with units. These counts are minimums — add whatever else your design needs.
Engineering documentation standard — required in every Chapter 4 subsection
These rules are graded on every subsection. Work that misses them is capped on technical accuracy, exhibits, codes and communication, whatever the quality of the prose.
Code and standard references
- Every requirement, factor, coefficient, limit and allowable you apply cites the governing document AND the exact section, article or sub-article number — e.g. ACI 318-19 §22.5.5.1, AISC 360-22 Chapter J, Section J3.6, AASHTO LRFD 10th Ed. Article 3.6.1.2.2, ASCE 7-22 §12.8.1, ASTM D2487, state DOT manual section, local stormwater manual chapter.
- Give the edition or year of every document the first time it appears, then use a consistent short form.
- Where a code equation is used, quote the equation number (e.g. Eq. 22.5.5.1) next to your displayed equation.
- Where you depart from a code provision, state the clause you are departing from and the engineering justification.
- List every code, standard and manual actually used in a Codes and Standards table at the start of the subsection.
Citations for statements
- Every statement of fact, value taken from elsewhere, material property, soil parameter, rainfall depth, unit cost or published method carries an in-text citation (APA) to its source.
- Field and lab data cite the report, boring log, gauge, survey file or test number and its date.
- Manufacturer data cites the product literature and revision date; software results cite the program, version and model file name.
- Uncited assertions are treated as assumptions and must appear in the assumptions table with a justification.
- Every in-text citation resolves to a full entry in the reference list.
Step-by-step calculations
- Structure every calculation the same way: (1) objective, (2) governing code clause, (3) equation in symbolic form with the equation number, (4) definition of each symbol, (5) numerical substitution, (6) result with units, (7) comparison against the limit and the pass/fail statement.
- Show the substitution line — never jump from the formula to the answer.
- Number displayed equations sequentially (Eq. 4.1, 4.2, …) and refer to them by number in the text.
- State the load or flow combination governing each calculation by name.
- Carry consistent significant figures and round only at the reported result; state the rounding convention once.
- Present repetitive element checks in a calculation table with one row per element and the same column order throughout.
Free body diagrams and figures
- Draw a separate free body diagram for each isolated element — no combined sketches standing in for several members.
- Dimension every FBD: span, depth, thickness, cover, eccentricity, embedment, slope, pipe diameter, wall height — with the dimension lines and values shown.
- Label every force, pressure, reaction and moment with its symbol, magnitude and units, and show the sign convention and coordinate axes.
- Show supports and boundary conditions explicitly (pin, roller, fixed, elastic, buoyant, hydrostatic).
- Accompany each FBD with its shear, moment, thrust, pressure or hydraulic grade diagram at the same scale reference.
- Number and caption every figure (Figure 4.x) and refer to it by number in the narrative; add a scale or north arrow to plans.
Units and notation
- Every number in text, tables, figures and equations carries its unit — no bare numbers.
- Use one unit system throughout (US customary or SI); if both appear, give the converted value in parentheses consistently.
- Check dimensional homogeneity of each equation and say so — the units of both sides must match.
- Provide a nomenclature table defining every symbol with its unit.
Checking and verification
- Every calculation is checked by an independent route — hand check against software, alternative method, order-of-magnitude estimate, or a published worked example — and the check is shown, not just claimed.
- Report demand-to-capacity ratios and factors of safety against the required values, with the source clause for each required value.
- Include a verification/checking table: item, method of check, expected, obtained, difference, accept or revise.
- Sanity-check every result (magnitude, direction, plausibility) and state the conclusion.
- Record who checked the work and on what date; flag anything still unverified as an open item.
- State limitations and the range over which the result is valid.
How to complete this section
Do this next: Read the BMPs lecture and the worked example so you know what "Stormwater BMP treatment train design with sizing and maintenance plan." has to contain.
Not sure how to start or how much depth is expected? Read the fully written model example for this deliverable first — it shows the structure, tables and level of justification your advisor grades against.
Hydraulic Design Office — what this workspace teaches
Watershed hydrology, stormwater, channels, culverts, networks and hydraulic structures.
- Watershed delineation, land use, curve number and imperviousness
- Rainfall: IDF curves, design storms, return periods
- Rational Method and NRCS/SCS runoff methods with validity limits
- Hydrograph development and flood routing (HEC-HMS concepts)
- Open channel flow: Manning's equation, normal and critical depth, froude number
- Culvert hydraulics: inlet vs. outlet control, headwater, performance curves
- Storm sewer network design and hydraulic grade line
- Detention basin sizing, stage-storage-discharge and outlet structures
- Weirs, orifices and energy dissipation structures
- Stormwater BMPs, water quality volume and EPA guidance
End-of-term milestones
- Tuesday, November 17, 2026 — Poster printed and ready. 36 in × 48 in poster finalized and printed one week before the November 24 showcase.
- Wednesday, November 18, 2026 — Final document package uploaded for scoring. Chapters 4–5, calculation package, drawings and appendices uploaded in the app for advisor scoring.
- Wednesday, November 18, 2026 — Poster presentation to faculty and industry. Wednesday poster session — printed 36 in × 48 in poster presented in person; industry reviewers score communication and impact.
- Wednesday, November 25, 2026 — Oral presentation and defense (scored). Scored oral presentation and defense held on Wednesday, November 25.
BMPs
Select and size a treatment train of stormwater best management practices for the site.
Section B
Engineering story
A real project situation that frames this module
A water resources engineering team hits bmps in week 6, with the hydrologic and hydraulic model with the sized conveyance already promised to the owner. Select and size a treatment train of stormwater best management practices for the site. The reviewer starts at the end and works backwards, and the chain breaks at bMP treatment train concept.
Selecting a BMP based on removal efficiency alone without checking site constraints (space, soils, water table). Because pollutant removal efficiency comparison across BMP types, the error does not stay local: it is carried into the design of record that drawings, quantities and cost are generated from, and every downstream product inherits it before anyone notices.
Downstream property owners, emergency responders and the utility carry the consequence. On this module specifically, the exposure runs through water quality volume (WQv) vs, and the cost of correction rises every week the hydrologic and hydraulic model with the sized conveyance moves closer to issue.
Decisions the engineer must make
- What record establishes bMP treatment train concept, and is that record in the project data inventory?
- Does EPA NPDES/SWMM (Current), MS4 Permit / BMP Manual, govern here — and is that the edition adopted by the jurisdiction?
- What is the acceptance criterion for pollutant removal efficiency comparison across BMP types, and was it written before the result was known?
- Is the documented procedure valid for the conditions this project actually presents?
- If the check fails, does the team revise the hydrologic and hydraulic model with the sized conveyance or raise a change request against the locked baseline?
Photo 1. Pump station: where system head curve, pump curve and operating point meet real hardware.
Capstone Studio instructional photograph
Section C
Why this matters
Professional
A licensed engineer defending bmps cites EPA NPDES/SWMM (Current), MS4 Permit / BMP Manual, and shows the record behind each input. Your stormwater bmp treatment train design with sizing and maintenance plan. is reviewed the same way — traceability is assessed before arithmetic.
Technical
BMP treatment train concept controls the numbers this module hands forward. Pollutant removal efficiency comparison across BMP types determines whether those numbers remain valid once conditions change.
Safety
The failure mode this module guards against is a conveyance or storage element overtopped by the design event. It reaches people through maintenance burden and long-term performance considerations in BMP selection, which is why the safety check is recorded explicitly here rather than inferred from a passing strength or performance check.
Economic
The design of record that drawings, quantities and cost are generated from is priced from this work. Quantities, unit costs and schedule float all trace to bMP treatment train concept; a late correction here is paid for as a change order, not a redline.
Environmental
Environmentally, this module fixes receiving-water quality, channel erosion and altered baseflow. Choosing conservatively without justification is not free — the excess shows up as material, energy and land that the project consumes for no measurable gain.
Community
A BMP design without a documented, funded maintenance plan should be considered incomplete. Households and businesses in the floodplain the design is meant to protect live with that outcome long after the semester ends.
Section D
Learning objectives
By the end of this module you will be able to:
- 1.Analyze bMP treatment train concept, using this project's own conditions rather than a textbook case.
- 2.Explain pollutant removal efficiency comparison across BMP types, using this project's own conditions rather than a textbook case.
- 3.Explain water quality volume (WQv) vs, using this project's own conditions rather than a textbook case.
- 4.Interpret maintenance burden and long-term performance considerations in BMP selection, using this project's own conditions rather than a textbook case.
- 5.Apply EPA NPDES/SWMM (Current), MS4 Permit / BMP Manual, and cite the section that governs your acceptance decision.
- 6.Produce stormwater bmp treatment train design with sizing and maintenance plan. at a standard the floodplain administrator would accept without a second revision cycle.
Section E
Instructional content
Full lecture notes with figures and governing equations
BMPs: from proposal statement to engineering product
Select and size a treatment train of stormwater best management practices for the site. That single sentence hides the substance of the module: bMP treatment train concept, and pollutant removal efficiency comparison across BMP types. Both must be established from project evidence before anything downstream is credible.
In water resources engineering, this work is the input to the hydrologic and hydraulic model with the sized conveyance. Water quality volume (WQv) vs — which is why this page asks you to record the source of every quantity, not just its value. The design of record that drawings, quantities and cost are generated from depends on it.
- BMP treatment train concept: pretreatment, primary treatment, and conveyance
- Pollutant removal efficiency comparison across BMP types
- Water quality volume (WQv) vs. channel protection volume (CPv) design objectives
- Maintenance burden and long-term performance considerations in BMP selection
Photo 1. BMPs: from proposal statement to engineering product in practice — Inlet capture during rainfall: gutter spread and inlet capacity decide whether the lane floods.
Capstone Studio instructional photograph
Decision logic: the procedure that replaces a closed-form solution
BMPs is governed by a documented procedure rather than a single expression, so the decision logic is the deliverable: what you accept, what you reject, and on what evidence. BMP treatment train concept.
Write the acceptance criterion before you look at the result. Pollutant removal efficiency comparison across BMP types — recording the criterion afterwards lets it be shaped to fit the number you happened to get.
Photo 2. Decision logic: the procedure that replaces a closed-form solution in practice — Aeration basin: detention time, loading rate and oxygen transfer as an operating process.
Capstone Studio instructional photograph
Constraints, adopted standards and the safety case for bmps
EPA NPDES/SWMM (Current), MS4 Permit / BMP Manual, governs this module: Stormwater treatment BMP selection and sizing
The safety case is explicit here. The failure mode is a conveyance or storage element overtopped by the design event; the people exposed are downstream property owners, emergency responders and the utility; the control that prevents it is maintenance burden and long-term performance considerations in BMP selection together with an independent check by someone who did not perform the work.
- Controlling criterion for this module: bMP treatment train concept.
- Adopted reference: EPA NPDES/SWMM (Current) — cite MS4 Permit / BMP Manual by number.
- Failure mode guarded: a conveyance or storage element overtopped by the design event.
- Evidence produced: Stormwater BMP treatment train design with sizing and maintenance plan..
Photo 3. Constraints, adopted standards and the safety case for bmps in practice — Inlet capture during rainfall: gutter spread and inlet capacity decide whether the lane floods.
Capstone Studio instructional photograph
Where this method stops being valid
Every method has a domain of validity. State the range of geometry, loading, material behaviour or flow regime over which your approach holds, and state what you would do instead beyond it.
For this project, the boundary you are most likely to push is maintenance burden and long-term performance considerations in BMP selection. If you cross it, say so in writing, bound the error, and carry the limitation into your results chapter. A disclosed limitation is professional practice; a silent extrapolation is not.
Photo 4. Where this method stops being valid in practice — Compression test on a concrete cylinder: the measurement behind every f′c used in design.
Wikimedia Commons, public domain
Section F
Engineering workflow
Steps
- 1. Assemble the inputs this module needs — bMP treatment train concept; pollutant removal efficiency comparison across BMP types — each with a unit and a source record.
- 2. Confirm EPA NPDES/SWMM (Current) is the adopted edition and locate MS4 Permit / BMP Manual.
- 3. State the assumptions and the acceptance criterion for bMP treatment train concept.
- 4. Execute the documented procedure, recording each judgement and the evidence behind it.
- 5. Test the result against water quality volume (WQv) vs.
- 6. Audit units and run an order-of-magnitude check by hand before the number leaves your desk.
- 7. Obtain an independent check from a teammate who did not perform the work, and record their name and date.
- 8. Assemble stormwater bmp treatment train design with sizing and maintenance plan. and submit it to the floodplain administrator for review.
Decision points
- Is every input behind bMP treatment train concept traceable? If not — stop and collect the record.
- Does the result satisfy pollutant removal efficiency comparison across BMP types? If not — revise the work, never the criterion.
- Would the correction change the design of record that drawings, quantities and cost are generated from? If yes — raise a change-control request before proceeding.
- Have you ruled out the most common error on this module — selecting a BMP based on removal efficiency alone without checking site constraints (space, soils, water table)?
Quality checklist
- Documented: bMP treatment train concept
- Documented: pollutant removal efficiency comparison across BMP types
- Documented: water quality volume (WQv) vs
- EPA NPDES/SWMM MS4 Permit / BMP Manual cited by section number
- Procedure steps recorded in order with evidence
- Acceptance criterion recorded before the result
- Independent check signed and dated
- Stormwater BMP treatment train design with sizing and maintenance plan. attached and named per the course convention
Section H
Interactive visualization
BMPs — step-through
Advance one frame at a time. Each frame adds one engineering decision to the previous state.
Step 1 of 6
Identify pollutants of concern for the site
Section I
Applicable codes and standards
EPA NPDES/SWMM
Current · MS4 Permit / BMP Manual
Adopted design/analysis reference governing this module.
Relevance: Stormwater treatment BMP selection and sizing
Reference the section number and edition in your calculation package. Do not reproduce code text.
Section J
Worked examples
Full engineering solution format
Section K
Common mistakes and how to avoid them
- Selecting a BMP based on removal efficiency alone without checking site constraints (space, soils, water table)
- Sizing for water quality volume but ignoring channel protection volume where required
- Failing to document a maintenance plan and responsible party for each BMP
- Treating bMP treatment train concept as a given instead of establishing it from a project record.
- Producing stormwater bmp treatment train design with sizing and maintenance plan. without showing how pollutant removal efficiency comparison across BMP types was satisfied.
- Recording the outcome of this module without recording the judgement and evidence that produced it.
- Missing maintenance burden and long-term performance considerations in BMP selection, which is exactly the path to a conveyance or storage element overtopped by the design event.
- Designing to the average condition when the governing condition is the controlling one.
- Freezing a design before the constructability and access review that would have changed it.
- Citing the wrong edition of a standard, or citing a standard that does not govern the jurisdiction.
- Leaving boundary conditions undefined so the model is not reproducible by an independent checker.
- Using inputs that no field record, laboratory report, or published source supports.
Section L
Industry case study
MS4 Permit Non-Compliance Enforcement Cases
Various U.S. municipalities under EPA/state NPDES enforcement
Official findings
- EPA enforcement actions have cited municipalities for stormwater BMPs installed without maintenance plans that failed to perform as designed within a few years.
Field observations
- The controlling assumption was documented nowhere in the design record.
- No independent check existed at the stage where the error entered the work.
Engineering interpretation
- Interpretation below is student analysis for instructional purposes, not an official finding.
- Map the failure to a step in your own workflow and state where your process would have caught it.
Lessons learned
- A BMP design without a documented, funded maintenance plan should be considered incomplete.
Source: Summarize the published investigation; cite it in your reference list. Do not reproduce copyrighted report text.
Section M
FE Civil exam connection
Handbook FE Reference Handbook — water resources engineering section (record the section number from your handbook edition).
Exam topics
Handbook formulas
Weak results here feed your FE Civil Academy weak-area queue for targeted practice.
Question 1 of 2
Score: 0/2In bmps, which item must be established BEFORE the analysis is run?
Section N
Apply it to your project — BMPs
Complete this using your own capstone project data. Every field is saved to your project record and routed to your advisor with this module's submission.
Inputs and sources
Every value needs a traceable source.
| Quantity | Value | Unit | Source / record |
|---|
Assumptions and consequences
| Assumption | Basis | Consequence if wrong |
|---|
Self-check before submission
Section O
Design challenge
Consulting challenge — BMPs
Your firm has been retained to deliver the bmps scope for a municipal client on a compressed schedule. Produce the technical position your firm would defend at a public meeting.
Client request: The client wants a defensible recommendation, the basis of design, and an honest statement of what remains unresolved.
Constraints
- Adopted local code edition governs; no exceptions without written variance.
- Budget and schedule are fixed; scope changes require change control.
- Public safety and accessibility requirements are non-negotiable.
Deliverables
- One-page basis of design
- Supporting calculation extract
- Risk and limitation statement
Evaluation
- Technical correctness
- Standard compliance
- Clarity of engineering judgment
- Honest treatment of uncertainty
Section P
Documentation workspace
Write the report section for this module in the academic editor
Section Q
File uploads
Accepted: PDF, DOCX, XLSX, CSV, PNG, JPG, ZIP, SWMM
No files uploaded yet.
Section R
Deliverable and advisor review
Stormwater BMP treatment train design with sizing and maintenance plan.
Submissions route to your assigned faculty advisor and are scored independently by faculty and administrator rubrics.
Reflection
What was the hardest engineering judgment in this module, and how did you resolve it?
Section S
ABET outcome mapping
Stormwater BMP treatment train design with sizing and maintenance plan. with advisor review and dual scoring.
Assessment: Faculty rubric score and administrator rubric score on this module's submission.
Rubric: Engineering design · Target: 70% of students at or above 'meets expectations'.
Stormwater BMP treatment train design with sizing and maintenance plan. with advisor review and dual scoring.
Assessment: Faculty rubric score and administrator rubric score on this module's submission.
Rubric: Engineering design · Target: 70% of students at or above 'meets expectations'.
Stormwater BMP treatment train design with sizing and maintenance plan. with advisor review and dual scoring.
Assessment: Faculty rubric score and administrator rubric score on this module's submission.
Rubric: Engineering design · Target: 70% of students at or above 'meets expectations'.
Section T
References and further study
EPA NPDES/SWMM (Current)
Adopted reference — cite section numbers, do not reproduce text.
BMPs — instructor design procedure
Course template for the calculation package format expected in the final report appendix.
NCEES FE Reference Handbook
Locate the equations used here and note the handbook section for exam recall.
Advisor meeting agenda item
Bring the unresolved decision from this module to your next weekly advisor meeting.