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# Topic: groundwater flow

| Tool | Description |
|--------|-------------|
| [r.gwflow](r.gwflow.md) | Numerical calculation program for transient, confined and unconfined groundwater flow in two dimensions. |
| [r3.gwflow](r3.gwflow.md) | Numerical calculation program for transient, confined groundwater flow in three dimensions. |

*See also the corresponding keyword for additional references:*

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