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Water Tank Capacity Formula:
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Water tank capacity calculation determines the optimal size of rainwater harvesting tanks based on roof catchment area, local rainfall patterns, and Australian efficiency factors for water collection systems.
The calculator uses the water tank capacity formula:
Where:
Explanation: The formula calculates the potential rainwater harvest based on roof area and local rainfall, adjusted for Australian collection efficiency standards.
Details: Proper water tank sizing is crucial for maximizing rainwater harvesting efficiency, ensuring adequate water supply during dry periods, and optimizing investment in water storage infrastructure.
Tips: Enter roof area in square meters, average rainfall in millimeters, and Australian efficiency factor (typically 0.8 for standard systems). All values must be positive numbers.
Q1: What is a typical Aussie efficiency factor?
A: The Australian efficiency factor typically ranges from 0.8 to 0.9, accounting for system losses and first flush diversion.
Q2: How do I measure roof area accurately?
A: Measure the plan area of your roof that drains to your collection system. For complex roofs, break into sections and sum the areas.
Q3: What rainfall data should I use?
A: Use average annual rainfall data for your specific location from the Bureau of Meteorology for most accurate results.
Q4: Are there Australian standards for water tank sizing?
A: Yes, Australian standards recommend considering local climate patterns, water usage needs, and roof characteristics for optimal tank sizing.
Q5: Should I consider seasonal variations?
A: For areas with distinct wet/dry seasons, consider designing for dry season storage needs or using monthly rainfall data for more precise calculations.