1. What is the Water Requirement Calculation?

The water requirement calculation determines the average daily water demand for a building based on population and per capita consumption. It includes a 10% safety factor to account for variations and unexpected usage.

2. How Does the Calculator Work?

The calculator uses the water requirement formula:

Where:

• \( ADD \) — Average Daily Demand (liters/day)
• \( LPCD \) — Liters Per Capita per Day (liters/person/day)
• \( P \) — Population (number of people)
• \( 0.1 \times P \) — 10% safety factor

Explanation: The formula calculates basic water requirements based on population and adds a 10% safety margin to ensure adequate supply for peak demands and unexpected usage.

3. Importance of Water Requirement Calculation

Details: Accurate water requirement calculation is essential for proper plumbing system design, water storage capacity planning, and ensuring adequate water supply for building occupants. It helps prevent water shortages and ensures efficient water management.

4. Using the Calculator

Tips: Enter LPCD values based on building type (typically 100-200 liters/person/day for residential buildings). Population should be the maximum expected occupancy. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are typical LPCD values for different building types?
A: Residential: 100-200 L/person/day, Commercial: 50-100 L/person/day, Institutional: 150-250 L/person/day. Values vary based on facilities and usage patterns.

Q2: Why is the 10% safety factor included?
A: The safety factor accounts for peak demand periods, unexpected usage, system losses, and ensures adequate water supply during high consumption periods.

Q3: How does building type affect water requirements?
A: Buildings with kitchens, bathrooms, laundry facilities, or commercial operations require higher LPCD values than basic residential buildings.

Q4: Should seasonal variations be considered?
A: Yes, water consumption often increases during summer months. For critical applications, consider seasonal adjustment factors.

Q5: How does this calculation relate to storage tank sizing?
A: The ADD calculation forms the basis for determining appropriate water storage capacity, typically requiring 1-2 days of storage for emergency supply.