What is subsurface drainage?

What is subsurface drainage?

Subsurface drainage is the removal of water from the rootzone. It is accomplished by deep open drains or buried pipe drains.

What is collector drain?

Collector Drains are installed with an automatic laser controlled trencher. The sod can be lifted and backfilled with native soil, sand, or pea stone. It is then compacted, excess soil removed, and sod relaid.

What is a cross drain?

Although the term is often misused to describe a relief culvert, a cross drain is actually a ditch that moves water across the road and prevents the accumulation of runoff that may cause a road to wash out, or a fill to fail.

What are the three types of drainage system?

The types of drainage systems will allow you a better comprehension of their roles and how they work together.

• Surface Drainage System. Surface drainage systems remove excess water from the land’s surface through channels or ditches.
• Subsurface Drainage System.
• Slope Drainage System.
• Downspouts and Gutter Systems.

What is sub drain?

Subdrain – (4”, 6”, 8” (inch) perforated PVC pipe that is buried in the street right- of-way, drains water from soils during construction, usually installed deep beneath other utilities.

Why is subsurface drainage important?

Excess water restricts the available air and inhibits plant growth. Artificial subsurface drainage increases productivity on land where high water table or soil moisture conditions prevent the gravitational movement of water from the root zone.

What are the different types of drainage?

There are 4 main types of subsurface drainage systems: corrugated and PVC slotted subsurface pipes. mole drainage (including mole drains, mole drains over collector pipe systems and gravel mole drains) interceptor drains.

What are the types of cross drainage work?

Types of Cross Drainage works:

• Type – 1: Cross drainage work carrying canal over the drain.
• Type – 2: Cross Drainage work carrying Drainage over the canal.
• Type –3: Cross drainage works admitting canal water into the canal.
• Type – 1: Canal over drainage [HFL < FSL]
• Aqueduct:
• Syphon Aqueduct:

What is cross drainage in highway?

A cross drainage work is a structure carrying the discharge from a natural stream across a canal intercepting the stream. Canal comes across obstructions like rivers, natural drains and other canals.

What are the two types of drainage systems?

Types of Drainage Systems There are two main types of drainage system options: surface drains and french drains. Surface drainage systems consist of a few ground-level areas drains that are connected to PVC piping. When it rains, water flows down the drains, into the piping, and is transferred away from the house.

What is a surface drain?

Surface drains are used to collect and move away large volumes of water in a short amount of time. They are frequently installed in sloped surfaces like showers and driveways to catch surplus water runoff and drain it away before it can collect and cause serious damage.

What is vertical drainage?

Vertical Drain The slow rate of consolidation in saturated clays of low permeability may be accelerated by means of vertical drains which shorten the drainage path within the clay. 4. Vertical Drain 5. Vertical Drain Horizontal Radial Drainage Vertical Drainage

What are prefabricated vertical drains?

Prefabricated Vertical Drains (PVDs) or ‘Wick Drains’ are composed of a plastic core encased by a geotextile for the purpose of expediting consolidation of slow draining soils. They are typically coupled with surcharging to expedite preconstruction soil consolidation.

Who invented the vertical drain?

Within the decade Walter Kjellman, then Director of the Swedish Geotechnical Institute, developed a prefabricated band-shaped vertical drain made of cardboard core and paper filter jacket which was installed into the ground with mechanical equipment [9].

What is the design discharge capacity of the drain?

The design discharge capacity of the drain is a function of its cross-sectional area (core available for flow). This capacity can and will likely be reduced immediately upon installation and over the lifetime of the project.