What are the types of surface drainage?
averyEnlightened
What are the types of surface drainage?
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What are the types of surface drainage?
avery
Types of surface drainage systems
Medium-sized drains (0.3m to 1m deep) made by excavators or specific drainage machines are usually V-shaped with a flat bottom with enough slope (gradient) to ensure that the water is removed quickly but not cause scouring of the drain walls or bottom. This is usually not a problem because they are used on the flatter areas. The velocity of water flow should be slow on the sandy and sandy clay loam soils and can be quicker on the clays and clay loams.
The size of open drains depends on the amount of water to be removed or intercepted. Formulae are available to calculate the required design parameters.
Andrew Pel
Types of surface drainage systems
shallow surface drains
Shallow surface drains (up to 0.3m deep) formed by hand shovel or ‘spinner cuts’ are most useful for removing ponded water from shallow depressions to larger drains or streams. They are:
generally not suitable for draining large flat areas
inconvenient for feed out or passenger vehicles and fodder conservation equipment
They tend to be temporary in nature since they:
are often pugged by animals
silt up quickly
overgrow with less desirable species
get wrecked by machinery in wet weather
andrew
Open Drains. Shallow. Medium Depth. Large.
Humps and Hollows.
Levees.
Grassed Waterways