How do you plan a drainage system?
Step 1.
As discussed in Section 8.7.4.4.A, mark on a plan the location of inlets which are necessary without regard to the contributing drainage area.
Step 2.
Start at a high point on the roadway grade, at one end of the job if possible, and work towards the low point.
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Main Functions of Drainage
A good and well-maintained drainage system plays the following main functions: The first three functions are performed by longitudinal drainage components; in particular, side drains while the fourth function requires cross drainage structuressuch as culverts, fords, drifts, and bridges.
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Minimum Slope For Road Drainage
Most road drainage manuals require the drainage slope/gradient to be at least 0.5% to drain water away and also reduce skidding.
Therefore, in considering drainage construction, engineers must take into account both surface and subsurface drainage depending on the existing conditions.
The former takes care of the process of safely dispersing surfac.
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What is a drainage project?
The term drainage is defined in several different ways, including:
the process of removing surplus groundwater or surface waters by artificial means the manner in which the waters of an area are removed and the area from which waters are drained.
A project may alter the existing drainage. ,
What is a road drainage system?
The road drainage system consists of two parts:
dewatering and drainage. “Dewatering” means the removal of rainwater from the surface of the road. “Drainage” on the other hand covers all the different infrastructural elements to keep the road structure dry. ,
What Is Road Drainage?
Road drainage is a system where a structure is built to collect both surface and subsurface water runoff and channel it to a required place.
Improper drainage of the road increases the risk of skidding and long braking distances in wet conditions and reduces windscreen visibility as a result of splashing from the tyres of other vehicles, especially.
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When should a drainage structure be used?
A drainage structure should be used when a change in pipe size is necessary.
A pipe junction is the connection of a lateral pipe to a larger trunk pipe without the use of a drainage structure.
There are no standard pay items for junctions and pipe connections should be made at a drainage structure.
A system by which water is drained on
An agricultural drainage system is a system by which water is drained on or in the soil to enhance agricultural production of crops.
It may involve any combination of stormwater control, erosion control, and watertable control.
