Calculate Potential Q
Description
Calculates potential discharge Q at each stage in the cross-section characteristics table based on cross-section's slope (S0) and Manning;s N (ManningN) using normal depth calculations and Manning's equation for calculating velocity based on cross-section properties. Results are stored in the "Q" field in the input cross-section characteristics table (will be created by the tool). Input cross-section feature class must have these fields populated:
- HydroID - unique cross-section identifier.
- S0 - longitudinal slope at the cross-section (dimensionless).
- ManningN - average roughness coefficient for cross-section.
Corresponding cross-section characteristics table must have these fields populated:
- XID - HydroID of the source cross-section.
- Z - absolute elevation.
- H - depth.
- A - area.
- P - wetted perimeter.
- R - hydraulic radius.
- B - cross-section width.
- XS - station of the first cross-section point at the Z-line.
Field Q will be created if it does not exist (otherwise it will be overwritten).
Usage
ComputePFTableQ XLines PFTable
Parameters
Parameter Name | Type | Direction | Data Type | Dialog Reference |
---|---|---|---|---|
Input 3D Cross-section FC | Required | Input | Feature Layer | 3D polyline feature class representing cross-sections (profile line). Feature class must have HydroID, S0, and ManningN fields populated. |
Input Cross-section Characteristics Table | Required | Input | Table View | Input and output cross-section characteristic table with following attributes (many records for each cross-section): |