Quick Answer
Calculate Stormwater Step-Backwater Analysis for Water Surface Elevation Profile
Calculator
Result Interpretation
Stormwater Step-Backwater Analysis for Water Surface Elevation Profile Calculator computes Downstream water surface elevation in m using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Upstream water surface elevation = 100
- Energy grade line slope = 0.002
- Reach length = 50
Expected Result:
- Downstream water surface elevation = 100.05
Engineering Interpretation:
Under the given input conditions, the calculated result is: Downstream water surface elevation = 100.05 m.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
downstream water surface elevation = upstream water surface elevation + (energy grade line slope * reach length) / 2.0Formula family: formula_stormwater_sw_conveyance_backwater_curve_analyzer
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| Upstream water surface elevation | Upstream water surface elevation | INPUT | Upstream water surface elevation |
| Energy grade line slope | Energy grade line slope | INPUT | Energy grade line slope |
| Reach length | Reach length | INPUT | Reach length |
| result | Downstream water surface elevation | OUTPUT | Downstream water surface elevation |
Calculation Steps
- Enter the upstream water surface elevation in m.
- Enter the energy grade line slope in m/m.
- Enter the reach length in m.
- Step 1: Compute downstream water surface elevation.
- Read the downstream water surface elevation (m) from the results.
Engineering Summary
Calculate Stormwater Step-Backwater Analysis for Water Surface Elevation Profile
Frequently Asked Questions
What does this calculator calculate?
The Stormwater Step-Backwater Analysis for Water Surface Elevation Profile Calculator estimates Downstream water surface elevation based on the input parameters you provide
Why is upstream water surface elevation important in this calculation?
upstream water surface elevation is directly proportional to downstream water surface elevation. When you enter upstream water surface elevation in m, the calculator uses it in the engineering formula to compute the output
How should I interpret the result downstream water surface elevation?
The calculator outputs downstream water surface elevation in m. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Upstream water surface elevation (m), Energy grade line slope (m/m), Reach length (m). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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