# crack

| Code | Option                            |
| ---- | --------------------------------- |
| 0    | Do not compute crack flow in soil |
| 1    | Compute crack flow in soil        |

If crack = 1, the crack volume potential is controlled by [perc\_crk](https://swatplus.gitbook.io/io-docs/introduction-1/soils/soils.sol/perc_crk) in [**soils.sol**](https://swatplus.gitbook.io/io-docs/introduction-1/soils/soils.sol).