The WQ Turbidity Page allows viewing and editing of control data turbidity fields shared by all pipe types.
If values are not set in these fields, the pipe cannot be a source of turbidity, although turbidity can still pass through the pipe from upstream pipes or node sources.
For a pipe to be a possible source of turbidity, all fields except Erosion Exponent must have a value greater than zero. The Erosion Exponent field can take any value; if let unspecified a default of 2 is assumed.
See Water Quality - Turbidity Analysis for details.
For more information on the data fields on this page, see the Network Data Fields pages.
For more information on all link types, see Links. For more general information on controls, see Control Data.
| Data Field | Description |
|---|---|
| Maximum Shear Strength |
The maximum value for the corrosion layer shear strength on the pipe wall. The maximum value for which the hydraulic shear strength will result in material being eroded from the pipe wall. |
| Initial Shear Strength |
The initial value for the corrosion layer shear strength on the pipe wall. The hydraulic shear strength must rise above this initial value to begin the erosion of material from the pipe wall. |
| Erosion Coefficient | Parameter used to calculate the quantity of material eroded from the pipe wall when the hydraulic shear stress exceeds the corrosion layer shear strength; the excess shear. |
| Erosion Exponent |
The power to which the ratio of excess shear to maximum shear strength is raised when calculating the quantity of material released from the pipe wall. A value of zero will be interpreted as meaning the erosion is independent of the excess shear. |
| Release Coefficient | Parameter used to calculate the increase in turbidity as a result of material eroded from the pipe wall. |