Rainwater event volume budget — captured share scenarios.
How does changing captured share affect rainwater event volume budget when the other inputs stay fixed?
What this decision changes
This entered value uses the method's stated quantitative basis. Retain its unit, denominator and relationship to the other inputs when comparing alternatives. Method basis: Uses horizontal catchment area for the supplied rainfall depth. Stored volume is bounded by the entered usable capacity; hydraulic capacity and drinking-water suitability are excluded.
The focus is supplied captured share. All other shared inputs remain fixed for each evaluated range.
Evaluate your supplied alternatives
Start with your measured plan and selected product data. The initial values and range are illustrative. Each scenario changes only supplied captured share; the other entered values stay fixed.
9 evaluated scenarios
Baseline: Event volume retained in available storage — 0.5 m³. Rejected combinations remain visible below.
| Supplied captured share | Event volume retained in available storage | Change from baseline | Use this scenario |
|---|---|---|---|
| 48 % | 0.38 m³ | -0.12 m³ | Open in calculatorExact quantity breakdown
Rainfall and capture share are user inputs, not weather predictions. This arithmetic budget does not size gutters, pipes or overflows, assess water quality or promise collection performance. |
| 54.5 % | 0.445 m³ | -0.055 m³ | Open in calculatorExact quantity breakdown
Rainfall and capture share are user inputs, not weather predictions. This arithmetic budget does not size gutters, pipes or overflows, assess water quality or promise collection performance. |
| 61 % | 0.5 m³ | 0 m³ | Open in calculatorExact quantity breakdown
Rainfall and capture share are user inputs, not weather predictions. This arithmetic budget does not size gutters, pipes or overflows, assess water quality or promise collection performance. |
| 67.5 % | 0.5 m³ | 0 m³ | Open in calculatorExact quantity breakdown
Rainfall and capture share are user inputs, not weather predictions. This arithmetic budget does not size gutters, pipes or overflows, assess water quality or promise collection performance. |
| 74 % | 0.5 m³ | 0 m³ | Open in calculatorExact quantity breakdown
Rainfall and capture share are user inputs, not weather predictions. This arithmetic budget does not size gutters, pipes or overflows, assess water quality or promise collection performance. |
| 80.5 % | 0.5 m³ | 0 m³ | Open in calculatorExact quantity breakdown
Rainfall and capture share are user inputs, not weather predictions. This arithmetic budget does not size gutters, pipes or overflows, assess water quality or promise collection performance. |
| 87 % | 0.5 m³ | 0 m³ | Open in calculatorExact quantity breakdown
Rainfall and capture share are user inputs, not weather predictions. This arithmetic budget does not size gutters, pipes or overflows, assess water quality or promise collection performance. |
| 93.5 % | 0.5 m³ | 0 m³ | Open in calculatorExact quantity breakdown
Rainfall and capture share are user inputs, not weather predictions. This arithmetic budget does not size gutters, pipes or overflows, assess water quality or promise collection performance. |
| 100 % | 0.5 m³ | 0 m³ | Open in calculatorExact quantity breakdown
Rainfall and capture share are user inputs, not weather predictions. This arithmetic budget does not size gutters, pipes or overflows, assess water quality or promise collection performance. |
Read the evaluated results
Use the exact result lines to distinguish changed demand, relative proportions, time-normalised rates and the final purchased quantity. The published method specifies which relationship applies.
- Replace every illustrative baseline measurement and selected product value with the inputs for your actual task.
- Enter a comparison range on the focused input's stated unit and quantity basis.
- Review rejected combinations and use the exact detail lines to distinguish measured demand from whole purchases.
- Open an evaluated scenario in the full calculator to save its original inputs and quantity breakdown to a browser material project.
Keep the comparison within scope
The quantity basis and product or schedule data are supplied by you; no material performance or process specification is selected.
Uses horizontal catchment area for the supplied rainfall depth. Stored volume is bounded by the entered usable capacity; hydraulic capacity and drinking-water suitability are excluded.
Dimensions, quantities, prices, timing and product properties are supplied by you. This tool does not select construction specifications or assess structural, electrical or hydraulic suitability.
Only the listed samples are evaluated. Intermediate values, alternate constraints and global cutting optimality are not inferred from the graph.
Continue with this quantity method
Rainwater Event Volume Budget CalculatorOther independent input decisions
Read the measurement and purchase guides
- Rainfall event volume does not size a gutter or overflow
- Gutter stock quantity does not establish drainage capacity
Quantity method and illustrative scenarios checked 6 October 2026. Methods and scope.