In this example 600 x 240 x 1 144 000 cubic inches of water.
Rain runoff from roof.
These techniques will minimize the amount of water that accumulates or that causes erosion in the problem area.
There are times when it rains especially during big storms that water cascades off of a roof like a waterfall.
How to redirect rain off a roof.
A rain garden also reduces the amount of lawn chemicals and pet wastes that may otherwise run off into local lakes and rivers.
Use the water that drains off your roof.
For a rectangular house this is simply done by multiplying the length by the width of the roof.
The following approaches to redirect and capture runoff can be used to control heavy runoff causing prolonged wet areas or yard erosion.
In some communities the runoff problem is so big that homes with rain gardens qualify for a tax break.
Also outlined are the steps to build your own rain barrel to collect water from your roof and downspout for all outdoor uses like watering and cleaning.
For sample purposes a 55 gallon barrel will be used.
A 1 000 square foot roof can produce more than 600 gallons 2 271 2 l of runoff for every 1 of rain that falls on it.
The system outlined below will walk you through the steps of determining your rain barrel sizes based on average roof runoff.
Troughs that collect and channel rain running off a roof gutters play the most important role in protecting your home from roof runoff.
Finally you can dig a dry well in any low area.
It will have channeled water away from your foundation and reduced the load on the sewer system.
So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall.
If your downspouts are connected directly to a storm drain disconnecting them is the single most important step you can take to reduce runoff.
To calculate the runoff from any given rainfall.
If you have heavy runoff from roof downspouts and neighboring properties redirecting or capturing runoff can provide better control.
If your roof plan is more complicated break it up into smaller.
Rain barrels make collecting roof runoff convenient.
If you re thinking about buying a rain barrel look for one with a first flush feature which stores the first five to 10 gallons of runoff.
Step 1 calculate the total area of your roof.
With proper slopes gutter systems carry stormwater to downspouts that deposit the water into the ground and well away from your siding windows doors and foundation.
Before you know what size rain barrels or cisterns to install you will need to calculate the average amount of rain runoff from your roof.