// Rainwater Harvesting Potential (Volume in Liters) Catchment_Area = 100; // in square meters Average_Rainfall = 800; // in mm/year Runoff_Coefficient = 0.85; // For RCC Roof // Total Volume (V) = Area * Rainfall * Runoff // Convert 800 mm to 0.8 meters // V (m³) = 100 * 0.8 * 0.85 = 68 m³ // V (Liters) = 68 * 1000 = 68,000 Liters/year Rainfall_Yield_Formula = "V = A * R * C"; // Storage Tank Sizing // Tank_Volume = Daily_Demand * Dry_Period_Days * Safety_Factor // Ex: 1000 L/day * 50 days * 1.2 = 60,000 Liters