0
from Mcgraw Hill Water supply and sewerage 1960
Water tight roof surfaces 0.70-0.95
Asphaltic pavements in good order 0.85-0.90
Stone and brick with cemented joints 0.75-0.85
Stone and brick with un-cemented joints 0.40-0.50
macadamized roadways 0.25-0.60
Gravel roadways and walks 0.15-0.30
Parks, gardens, lawns and meadows,
depending on surface slope and character of soil 0.05-0.25
What else can I help you with?
Is gravel only for leveling after hard core is down?
It also assist in absorption of excess water, minimizing runoff
What are the consequences of coal?
It has many health issues, and it causes pollution when there is a typical runoff.
How do you calculate rainwater runoff to determine culvert size?
To calculate rainwater runoff for determining culvert size, you first need to assess the drainage area, including its size and land use characteristics, which affect runoff coefficients. Utilize the Rational Method, where runoff (Q) is calculated using the formula Q = CiA, with C being the runoff coefficient, i as the rainfall intensity (in inches per hour), and A as the area (in acres). After determining the peak runoff, consider factors such as culvert slope, material, and local regulations to select an appropriate culvert size that can handle the expected flow without causing flooding or erosion.
Is gravel bad for the environnent?
Gravel extraction can have negative environmental impacts, such as habitat destruction, disruption of local ecosystems, and water pollution from runoff. The process can alter landscapes and waterways, leading to erosion and sedimentation issues. However, gravel itself is a natural material and can be sustainable when sourced responsibly, with practices that minimize ecological damage and promote rehabilitation of extraction sites. Ultimately, the environmental effects depend on how and where gravel is extracted and managed.
Is gravel a fine aggregate?
Gravel can be composed of varying sizes of stone, sand, and fine dust, with the coarse stone measuring up to about 2 inches. Large stone is often referred to as ballast or sometimes, pit run. Even larger stone (6" to 24") is called rip-rap. Rip-rap is used to armor the soil to prevent erosion from water runoff. If you are using boulders or rip-rap, then gravel would probably be considered a fine aggregate. But if you are using gravel under a new sidewalk, say, then gravel would be somewhat coarse compared to the sand and fine dust in it.
What is snowmelt runoff?
Runoff is water that flows over the ground surface. Snowmelt runoff is runoff from melting snow.
Glacial runoff and what else provides water to the large rivers of India?
Runoff from rain and runoff from melting snow (which is NOT the same as glacial runoff).
Use runoff in a sentence?
New construction allowed runoff from hillsides which flooded basements in nearby homes.Runoff naturally seeks a path of least resistance.Continual runoff can undermine hills, leading to mudslides and ground failures.
What is construction runoff?
runoff caused by construction working
Does the causes of acid rain include runoff from cars?
acid rain comes from chemicals in the clouds, not runoff there is no "car runoff" runoff is from the slanted ground into water bodies
That water that moves across Earths surface after rainfall is called what?
runoff
What are the different stromwater runoff problems facing Arizona?
There are no stromwatrer runoff problems in Arizona, but there are stormwater runoff problems
