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Design Challenge · Game-Based Learning · IGW-NET

Capture-Zone Protection.

A contaminated site sits upgradient of a town's drinking-water well. You're the hydrogeologist. Contain the plume before it reaches the well — and beat your classmates doing it.

✎ Adaptable template⏱ 1–2 class sessions👥 Individual or teams🏆 Scored & ranked📈 Intro → Intermediate

The objective

Capture the contaminant plume so nothing reaches the supply well — using the fewest pumping wells at the lowest total cost.

What you learn

Hydraulic capture, well interference, and the real cost of over-pumping — the physics is learned through the competition, not memorized before it.

How it works

  1. Open the site in IGW-NET — the aquifer, the plume, and the well are already set up.
  2. Place extraction wells and set pumping rates. Watch the capture zone evolve in real time.
  3. Iterate until the capture zone fully envelops the plume with no breakthrough at the supply well.
  4. Submit your design — wells, rates, and total cost are logged to the class leaderboard.

How you win

Every valid design that achieves full capture is ranked by efficiency. Over-pumping works but bankrupts you; too little lets the plume slip through.

Score = full capture (pass / fail) → then rank by (number of wells × pumping cost)

Constraints

  • Fixed remediation budget cap
  • Maximum pumping rate per well
  • Regulatory drawdown limit at the property line

Deliverable

  • Your capture-zone design (well layout + rates)
  • A short justification of the trade-offs you made
  • Leaderboard placement

Make it yours — for instructors

Every number here is a starting point. Change the site, the budget, the deadline, or the scoring rule to fit your course — then publish your version to the instructor network as a new seed problem for others to adopt and adapt.