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A simple coefficient chart works best. However, in the event you do not have access to such a chart; here is the general coefficient information that can be used to calculate Storm water Runoff: 1) Smooth, Impervious Surfaces, i.e., Tile, Roofing materials, Concrete walkways has a runoff coefficient of approximately 90% 2) Gravel surfaces and paved asphalt surfaces have a runoff coefficient of about 80% 3) Mitigated, engineered and or loose soils have a coefficient rating of 60% 4) Natural soils like that found in an undisturbed forest has a general coefficient rating of approximately 30% 5) Built landscape areas like "Green Roofs" should hold to and strive to reach the target of a 30% runoff coefficient rating. Use this calculation to calculate runoff: (CA) X (R) X (E) X (0.6) = Area runoff in gallons. Understanding the equation: (CA) = Catchment area in Sq. Ft. i.e., 1 Acre = 43,560 Sq.Ft. (R) = Rainfall expressed in inches (E)= efficiency expressed in decimal (0.6) = Gallons per Square feet for every inch of rain
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What type of drainage system good for storm water runoff?
any type as long as it can hold water!!Dandy bags or curb sacks are good for sediment control
What determines the amount of runoff?
One of the factors that determine whether water infiltrates is the nature of the surface. Another factor that determines is the elevation of the surface or its shape.
What is the difference between infiltration and runoff?
infiltration is different because when it happens the rain soaks underground it doesn't fall back into bodies of water like runoff does.
Can you measure the Linear expansion and coefficient of Freezing Water?
Freezing water will expand about 3% linearly as it freezes, then it will contract with a positive expansion coefficient as ice and gets colder. It can be measured using methods such as dilatometer or transducer.
Coefficient of thermal expansion of water at 300C?
This can be found from the steam tables. www.x-eng.com gives steam tables. At different temperatures and pressures wolume of water can be found. To find the coefficient of expansion of water, find the volume at 5degree lower and 5 degree higher at same pressure. Take the mean and divide with the volume of water at desired temperature. Cross check the calculation for which you have the answer. I have used the way and works well. The coefficient of expansion of water changes rapidly with temperature at constant pressure.
How do you calculate storm water roof runoff?
You take the footprint of the rainfall (length feet multiplied by the width feet) and multiply by the rainfall feet ( inches divided by 12). This is your volume. Take this number and multiply it by 7.48 to determine the gallons of water! You forgot to add in the volumetric runoff coefficient. this is measured by: VRC= 0.05 +0.009(% imperviousness)
Is it illegal to drain a pool in the gutter?
Yes, the gutters are actually storm water runoff and you are not supposed to put chemically treated water into a stormwater runoff.
What is the worst cause of water pollution?
Chemicals such as pesticides cause water pollution from storm runoff.
What are the different stormwater runoff problems facing Arizona?
lots -OTHER PERSON there are no storm water runoff problems facing arizonia
How would an increase in storm runoff to rivers most likely affect ground water?
An increase in storm runoff to rivers most likely would affect ground water by reducing the amount of infiltration and groundwater recharge. This is where water moves downward from surface water to ground water.
What is water runoff?
Runoff water is the water flow that happens when soil is unfiltered to full capacity and all the extra water such as rain or melted water
What has the author Joseph B Hannon written?
Joseph B. Hannon has written: 'Underground disposal of storm water runoff' -- subject(s): Storm sewers
What are the release dates for Ask This Old House - 2002 Handling Storm-Water Runoff Refinishing Hardwood Floors 6-10?
Ask This Old House - 2002 Handling Storm-Water Runoff Refinishing Hardwood Floors 6-10 was released on: USA: December 2007 USA: 8 December 2007
What is chemical runoff?
Chemical runoff refers to the process in which chemicals used in agriculture, industry, or households are washed away by rainwater or irrigation and end up in rivers, lakes, and other bodies of water. This runoff can lead to water pollution and harm aquatic ecosystems.
What has the author William J Snodgrass written?
William J. Snodgrass has written: 'Implementation of pollution control measures for urban stormwater runoff' -- subject(s): Congresses, Water, Water quality management, Storm sewers, Urban runoff, Pollution
What five factors determine the amount of runoff in an area?
The five factors that determine the amount of runoff in an area are precipitation, soil type, slope of the land, land cover, and human activities such as urbanization and deforestation. These factors influence how much water can infiltrate the ground versus how much flows over the surface as runoff.
What type of drainage system good for storm water runoff?
any type as long as it can hold water!!Dandy bags or curb sacks are good for sediment control
