Stream Control Description
Control code.
United States Geological Survey, Surface Water User Group
| Code | Sort Order | Valid Flag | Name | Description |
|---|---|---|---|---|
| UNSP | 1 | true | unspecified | The streamflow control was not specified. |
| CHAN | 2 | true | channel control | The streamflow control is a channel where the geometry and roughness of a long reach of channel downstream from the stage gage are the elements that control the relation of the stage-discharge. |
| SECT | 3 | true | section control | The streamflow control type is defined by the geometry and composition of a single cross-section; for example, when the channel is constricted by a sand bar, rock outcropping, or man-made structures. A distinct downward break of the water surface can be detected at a section control. |
| CMBN | 4 | true | combined section and channel control | The streamflow control during the discharge measurement was both section and channel control. |