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Calcimator

Karst Feature Calculator

Sinkhole risk from limestone depth and water table.

Inputs

Results

Sinkhole susceptibility (0-100)

63.23

Risk category (0-3)2
Dissolution rate (mm/kyr)41.25
Time to dissolve (kyr)1,212
Cavity volume (m³/kyr/ha)20.63
CO₂ factor1.83
How to Use This Calculator
  1. Enter Limestone thickness (m) from geologic maps or borehole logs.
  2. Set Depth to bedrock (m) — the thickness of soil or sediment overlying the limestone.
  3. Enter the Water table depth (m) from surface; when the water table sits within the limestone, sinkhole risk increases sharply.
  4. Input Annual rainfall (mm) and Average temperature (°C) for the site.
  5. Interpret the Sinkhole susceptibility index (0–100) and Risk category (0=Low to 3=Very High) to guide site assessment decisions.
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