Description
Use the hypotenuse of horizontalWidth and the depth difference as bedLength.
Ideal water-storage and channel geometry uses dimensions, areas, and displacement fractions. Coherent length units determine areas and volumes; actual irregular geometry and hydraulic behavior require additional information.
Use the hypotenuse of horizontalWidth and the depth difference as bedLength.
When to use this tool
Use Open Channel Wetted Perimeter Panel Term when you need one explicit geometric component of a tank, bed, conduit, or channel.
How to use the tool and how it works
- Enter leftDepth, rightDepth, horizontalWidth, includeLeftWall, includeRightWall. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read bedLength, wettedPerimeter. Use the output convention below.
Use the hypotenuse of horizontalWidth and the depth difference as bedLength. Add each nonnegative side depth only when its wall flag is true for wettedPerimeter.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| leftDepth | Left Depth | Required. Finite number; minimum 0. |
| rightDepth | Right Depth | Required. Finite number; minimum 0. |
| horizontalWidth | Horizontal Width | Required. Finite number; minimum 0. |
| includeLeftWall | Include Left Wall | Required. Boolean. |
| includeRightWall | Include Right Wall | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| bedLength | Bed Length | Required. Finite number. |
| wettedPerimeter | Wetted Perimeter | Required. Finite number. |
{
"input": {
"leftDepth": 1,
"rightDepth": 1,
"horizontalWidth": 4,
"includeLeftWall": true,
"includeRightWall": true
},
"output": {
"bedLength": 4,
"wettedPerimeter": 6
}
}Limitations and assumptions
- All dimensions share units; this is one straight-bed panel with optional vertical walls, not the complete wetted perimeter of an arbitrary surveyed channel.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Check the full surveyed geometry and the physical model before interpreting storage, capacity, or safe operation.
References
Similar or alternative tools
- Stream Section Trapezoid Wetted Perimeter
Compute trapezoid area, bottom plus two sloping-side lengths as wettedPerimeter, and area/perimeter as hydraulicRadius.
- Circular Conduit Part Full Angle Factor
Return radius squared times (angle-sine(angle))/2 for area and radius times angle for wettedPerimeter.