Drainage – designing buildings wiki sustainable urban drainage systems design manual

Drainage is the artificial removal of water, both surface and sub-surface. Advanced drainage systems livermore ky Drainage is often a major element of and construction projects and is necessary to avoid flooding and other damage.

Typically, effluent is conveyed by drains to sewers, and from sewers to a suitable outfall or treatment plant.


Advanced drainage systems findlay oh In building drainage terms, effluent can refer to the following:

This is effluent contaminated by or trade waste. Advanced drainage systems raleigh nc Foul (or waste) water relates to effluent from sinks and basins which does not contain excreta. Sustainable urban drainage systems definition water relates to effluent from , toilets and urinals which does.

Subsoil and surface water are considered to be clean and can be discharged into an approved (e.g. Advance drainage systems river or lake), or without treatment. Agricultural drainage systems Permission is required from the relevant authority or owner before discharging. Sustainable urban drainage systems pdf Foul and water must be conveyed by sewer to a treatment plant before being discharged into a .

Subsoil drainage can be used to improve ground stability, to lower the moisture content of a site, to enhance horticultural properties for landscaping and so on. Advanced drainage systems muncy pa It can be required to drain the whole site or to protect a particular part.

According to the C of the , subsoil drainage should be provided to avoid the passage of ground moisture into a building’s interior or to prevent damage being caused to the building’s fabric.

Subsoil drainage is generally involves the use of pipes that are porous to allow subsoil water to pass through the pipe body, or pipes that are perforated with a series of holes in the lower half to allow subsoil water to rise into the pipe. Pictures of drainage systems Both types are generally laid dry jointed in a trench filled with rubble. Advanced drainage systems headquarters A pervious membrane is generally placed on top of the rubble as a filter mat, then covered with normal backfill and topped with 150 mm of topsoil.

This type of groundwater control is only feasible up to a depth of 1.5 m, and any further lowering of the water table should be achieved by other methods. Irrigation drainage systems For more information, see .

When drainage is used to protect a building’s , a cut off drain is generally installed that intercepts the flow of water and diverts it away from the site.

It is a requirement of ’s H that adequate provision is made for rainwater to be carried from the roof of buildings. Groundwater drainage systems To achieve this, roofs must be designed with a suitable fall towards either a surface water collection channel or gutter that conveys surface water to vertical rainwater pipes, which in turn connect the discharge to the drainage system.

Standards ‘flat’ roofs should have a designed minimum fall of 1:40, so that an actual finished fall of 1:80 is achieved, allowing some room for error in the construction.

Drainage from roofs is generally provided by internal rainwater outlets and downpipes, or by external guttering systems or hoppers. Advanced drainage systems investor relations It is recommended that there are at least two drainage points, even if the roof is small, to mitigate against one of them becoming blocked.

Drainage must be arranged so as to avoid causing or damage to the building. Sustainable urban drainage systems case study If the rainwater pipe is fitted internally it must have leak proof joints. Private drainage systems If external, the roofing should prevent water being blown into the by extending into and below the top of the gutter.

Traditionally, gutters and rainwater pipes were made using cast iron, although uPVC systems are increasingly common due to ease of installation and low requirements. Land drainage systems As long as adequate size, strength and durability can be assured, they can also be made of aluminium alloy, galvanised , and so on.

A paved area near a building is laid to falls of 1:60 towards a gully. Advanced drainage systems atlanta The type of area being drained and the shape of the paved area will determine the size and number of gullies. Advanced drainage systems buxton nd The maximum paved area per gully should be 400 sq. Natural drainage systems m. Advanced drainage systems pipeline If it is connected to a combined sewer, the yard gully should be trapped with a minimum 50 mm water seal.

The paving, laid to the same falls, drains away from a building to a channel laid to falls of 1:120. Advanced drainage systems vicksburg ms The channel is connected to the drainage system. Advanced drainage systems ceo The channel is typically:

The construction of affects the natural surface and subsurface drainage pattern of watersheds or hill-slopes. Advanced drainage systems orlando fl The provision of adequate drainage is important to prevent the accumulation of excess water or moisture on or within that can adversely affect their material properties, compromise overall stability and affect driver safety. Install drainage systems Drainage must cope with water from the carriageways, hard shoulders, foot/cycle paths, verges, and adjacent catchment areas.

() can provide an alternative to, or addition to, traditional drainage systems. Advanced drainage systems reviews They mimic ‘natural’ drainage by adopting techniques to deal with surface water runoff locally, through collection, storage, and cleaning before allowing it to be released slowly back into the environment.