Roof Catchement Calculations

Water/rain Catchment Building Method

Water/rain Catchment Building Method

Problem: Make a water catchment system harvesting all of the rain water off the roof. The water is absorbed into the ground. In this part of the country we get about 12 inches of rain per year. (That is not too much). The roof has about 2000 square feet surface area. We start out by [...]


Water Catchment Sizes and Shapes

Water Catchment Sizes and Shapes

It is not the size that matters but the shape. It is important to have the highest capacity for water to be absorbed by the soil to prevent flooding up the drain pipe or house. In this case we bury a catchment system about 18 to 20 inches below the surface. It is important to [...]


Roof Rain Water Calculations

Roof Rain Water Calculations

The calculation for rain harvesting is simple and straight forward. There are two places where rain water can be caught. Rain is caught off the roof or channeled into a holding area once it hits the ground. The amount of water harvested off a roof is calculated by this formula. Maximum water (gallons) = 7.48 [...]