# sediment Section

This section configures **sediment and fluid mud dynamics**, including **friction coefficients** and **polygons**.

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 | **Parameter** | **Description** |
 |---------------|----------------|
 | `fluid_mud_flag` | Flag to enable/disable fluid mud (`TRUE`, `FALSE`). |
 | `fluid_mud_friction_coefficient` | Friction coefficient for fluid mud (default: `1.18e-5 m/s`). |
 | `fluid_mud_polygons` | File for fluid mud polygons. |
 | `fluid_mud_polygons_data` | File for fluid mud polygons data. |
 | `fluid_mud_raster` | Raster file for fluid mud. |
 | `fluid_mud_smoother` | Smoother for fluid mud (`LEGACY`, `QUICK`). |
 | `fluid_mud_niterations` | Number of iterations for fluid mud smoother (default: `10`). |