How do I determine the stormwater runoff on my property?
72 هزار بار بازدید -
10 سال پیش
-
NDS gives you helpful tools
NDS gives you helpful tools to determine how much stormwater runoff you have on your property to help you find the perfect drainage solution!
For more information about how to determine stormwater runoff on your property, please visit us at http://ndspro.com/home-drainage/
One of the most important elements of designing a proper drainage system is determining how much stormwater is falling on your property and what to do with this volume of water. This video was developed to show you how to do that. This will also provide you with the tools needed to design a custom drainage system for your property. There are 3 steps to follow when calculating drainage:
1. First we need to calculate the storm runoff, or flow. Runoff is given the symbol Q
2. 2nd we convert the storm runoff into a volume of water
3. And finally, we determine how we are going to store the runoff volume
There are several methods that can be used to calculate drainage. The Rational Method is probably the easiest and most widely used method. The Rational Method's equation is Q = C x I x A / 96.23; where Q is the storm runoff in gallons per minute, C is the runoff coefficient, I is the rainfall intensity in inches per hour, and A is the drainage area in square feet. 96.23 is a conversion factor when you want the flow rate in gallons per minute and your drainage area is in square feet. C is the runoff coefficient. This is essentially the percentage of water that runs off a given surface. For example, if rain is falling at 2 inches per hour and only 1 inch per hour is running off of the surface, the C value for that surface is 1 divided by 2 or 0.5. I is the rainfall intensity in inches per hour. I can be calculated in several ways, but in this video we use the approximate rainfall values from this 100-year rainfall map. The 100-year rainfall map shows the approximate amount of rain that will fall in the 100-year storm event. A is the surface area where the runoff water is coming from, in square feet. What if the water is coming from 2 different surfaces but draining to the same area? You treat them individually, then combine the results. To download the companion calculation guide to this video, which includes all charts and resources included in this video, a second guide and video which take you through the steps needed to size your catch basins and pipes, or if you're interested in learning more about residential stormwater drainage and other NDS drainage products, visit the NDS Homeowner Drainage Website: http://www.ndspro.com/home-drainage/
Like us on Facebook: Facebook: NDSinc
Pin us on Pinterest: Pinterest: ndsmarketing
Watch more videos on our YouTube page: ndstraining
For more information about how to determine stormwater runoff on your property, please visit us at http://ndspro.com/home-drainage/
One of the most important elements of designing a proper drainage system is determining how much stormwater is falling on your property and what to do with this volume of water. This video was developed to show you how to do that. This will also provide you with the tools needed to design a custom drainage system for your property. There are 3 steps to follow when calculating drainage:
1. First we need to calculate the storm runoff, or flow. Runoff is given the symbol Q
2. 2nd we convert the storm runoff into a volume of water
3. And finally, we determine how we are going to store the runoff volume
There are several methods that can be used to calculate drainage. The Rational Method is probably the easiest and most widely used method. The Rational Method's equation is Q = C x I x A / 96.23; where Q is the storm runoff in gallons per minute, C is the runoff coefficient, I is the rainfall intensity in inches per hour, and A is the drainage area in square feet. 96.23 is a conversion factor when you want the flow rate in gallons per minute and your drainage area is in square feet. C is the runoff coefficient. This is essentially the percentage of water that runs off a given surface. For example, if rain is falling at 2 inches per hour and only 1 inch per hour is running off of the surface, the C value for that surface is 1 divided by 2 or 0.5. I is the rainfall intensity in inches per hour. I can be calculated in several ways, but in this video we use the approximate rainfall values from this 100-year rainfall map. The 100-year rainfall map shows the approximate amount of rain that will fall in the 100-year storm event. A is the surface area where the runoff water is coming from, in square feet. What if the water is coming from 2 different surfaces but draining to the same area? You treat them individually, then combine the results. To download the companion calculation guide to this video, which includes all charts and resources included in this video, a second guide and video which take you through the steps needed to size your catch basins and pipes, or if you're interested in learning more about residential stormwater drainage and other NDS drainage products, visit the NDS Homeowner Drainage Website: http://www.ndspro.com/home-drainage/
Like us on Facebook: Facebook: NDSinc
Pin us on Pinterest: Pinterest: ndsmarketing
Watch more videos on our YouTube page: ndstraining
10 سال پیش
در تاریخ 1393/01/19 منتشر شده
است.
72,084
بـار بازدید شده