Dike Capacity Calculator

Plan dike geometry with clear capacity outputs. Choose basin shape and adjust for freeboard easily. Download tables, share results, and reduce rework risk now.

Inputs

Controls how interior area is calculated.
From interior ground to crest.
Reserved height above operating level.
Used for embankment fill quantity.
Example: 3 means 3H:1V.
Reduces usable capacity.
Seepage, dead storage, and operational reserve.

Formula used

Interior area Rectangle: A = Li × Wi. Circle: A = π × (Di/2)². Custom: A = Ai.

Effective water depth heff = H − Fb. If negative, it is set to zero.

Containment capacity Raw: Vraw = A × heff. Adjusted: V = Vraw × (1 − s/100) × (1 − r/100), where s is settlement allowance and r is loss/reserve.

Dike fill quantity Base width: B = Wc + 2 × m × H. Section: Ad = (Wc + B)/2 × H. Fill: Vfill = Ad × L.

How to use this calculator

  1. Select a basin shape and enter interior dimensions or area.
  2. Enter dike height and freeboard to define operating depth.
  3. Provide crest width and side slope for embankment geometry.
  4. Add settlement and loss/reserve allowances when needed.
  5. Click Calculate to view results above this form.
  6. Use CSV or PDF export for records and review.

Example data table

Case Shape Interior dimensions Height (m) Freeboard (m) Allowances Adjusted capacity (m³) Fill volume (m³)
A Rectangle 30 × 20 m 2.5 0.3 5% settlement, 3% reserve 1,216.500 1,350.000
B Circle D = 40 m 3.0 0.5 8% settlement, 5% reserve 8,170.468 2,340.000
C Custom A = 1,200 m² 2.0 0.2 4% settlement, 2% reserve 2,073.600 960.000
Example outputs assume typical slopes and lengths. Replace with project values.

Notes for engineering review

  • This tool estimates volume from plan area and operating depth.
  • Hydraulic routing, wave runup, and seepage design are not included.
  • Use local standards for slope stability, compaction, and freeboard.
  • Confirm interior area at the intended operating elevation.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.