Roof Water Runoff Calculator

The first is that it will size a rain garden for you that treats 1 of rainfall.

Roof water runoff calculator.

Rain barrels store and reuse rainwater helping to reduce the overtaxing of sewer systems and protect the quality of groundwater. For a large roof it is recommended to have drains placed at multiple locations within the area of the roof. Take the dimensions of the footprint of your roof and convert them to inches. Simplified suitable for flattish roofs with little or no vertical faces or steep roofs draining to one side of box gutter only or any roof if you are in a hurry and make the necessary allowances for all catchments.

How to calculate roof runoff. Use the zoom tool in the lower right hand corner of the map to get closer so you can see draw on your roof. Calculate the total area of your roof. The drainage system of any roof can be located at the edge or in the middle of the roof.

Calculate your drainage install on site. Although this calculation is simple in principle the units can make it a headache. The catchment areais multiplied by the depth of rain that falls on it to give the total volumeof waterproduced. To calculate the runoff from any given rainfall.

National stormwater calculator help prevent pollution by controlling stormwater runoff. So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall. The area measurement will appear right above the map. Stormwater runoff calculator this calculator allows you to simulate the effects that installing a rain garden a type of green infrastructure could have on stormwater runoff from your property.

The calculator has two primary functions. It s one of the greatest threats to clean water in america today. Whether you re an urban planner developer landscape architect or homeowner this tool can help you balance land developments and landscaping with the right amount of green infrastructure. Box gutter with rain water head at end of box gutter.

Increasing the angle of a flat roof will always increase the speed of water movement across the surface. For a rectangular house this is simply done by multiplying the length by the width of the roof. If your roof plan is more complicated break it up into smaller more easily calculable areas and then add those areas together for the total area. A simple rain catchment system can provide water for outdoor use resulting in.

Submit your design let nds evaluate and help you with preparation of your submittal drawings and specs. The new nds app is the perfect tool for determining runoff and system requirements on the go. Then click on the outer points of your roof and a polygon will instantly be created.