watershed

Open drains gives out foul smell which effects our health. when insects like housefly sits on the garbage which is being drained,these flies carry pathogen and sits on food material and enters our body to cause disease. 4. sometimes when drain blocks the sewage enters our compounds to spread diseases.

There are two types of artificial drainage: surface drainage and subsurface drainage.

• 6.2. 1 Surface drainage. Surface drainage is the removal of excess water from the surface of the land.
• 6.2. 2 Subsurface drainage. Subsurface drainage is the removal of water from the rootzone.

Main requirements for outdoor systems

• The minimum diameter of pipes and fittings for outdoor pipelines is 100 mm and in this case deviation is not less than 0.01%, and deviation for pipeline DN150 is 0.008%;
• The angle between the discharge pipe and affiliable pipe must be at least 90°;

The main drainage systems consist of deep or shallow collectors, and main drains or disposal drains. Deep collector drains are required for subsurface field drainage systems, whereas shallow collector drains are used for surface field drainage systems, but they can also be used for pumped subsurface systems.

(dran’ij) The flow or withdrawal of fluids, such as blood, infused saline, pus, and collected debris, from a cavity, organ, surgical site, or wound. See: autodrainage; drain.

Serosanguinous drainage is thin, like water. It usually has a light red or pink tinge, though it may look clear in some cases. Its appearance depends on how much clotted red blood is mixed with serum.

Serosanguineous is the term used to describe discharge that contains both blood and a clear yellow liquid known as blood serum. Most physical wounds produce some drainage. It is common to see blood seeping from a fresh cut, but there are other substances that may also drain from a wound.

In a radial drainage system, the streams radiate outwards from a central high point. Volcanoes usually display excellent radial drainage. They also can be found on top of mountains sometimes. The radical pattern develops when streams flow in different directions from a central peak or dome like structure.

there are 4 types of drainage patterns on the basis of their flowing pattern-dendritic, trellis, radial and rectangular. dendritic-this pattern resembles branches of trees. ex, the indo-gangetic plains. trellis-in this pattern tributaries join the main rivers at right angles.