To calculate the Rainfall Harvested (RWH):
\[ RWH = \frac{L \times W \times ARF}{12 \times 7.48052} \]
Where:
Rainwater harvesting is the process of “catching” water that falls on a roof’s house and collecting it for further uses such as gardening, bathing, and drinking. Rainwater harvesting can be an excellent environmentally friendly way to save on the amount of freshwater a person consumes through normal means. This reduces the load on the water treatment plants and, in turn, reduces the load on the environment to provide those treatment plants with water.
Let's assume the following values:
Step 1: Multiply the length, width, and annual rainfall:
\[ L \times W \times ARF = 50 \times 30 \times 40 = 60000 \]
Step 2: Divide the result by 12 to convert to cubic feet:
\[ \frac{60000}{12} = 5000 \]
Step 3: Divide by 7.48052 to convert to gallons:
\[ RWH = \frac{5000}{7.48052} \approx 668.4 \text{ gallons} \]
The Rainfall Harvested is approximately 668.4 gallons.
