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Ideally, land drains are laid with access points so that high pressure water jetting is possible to clear silt. However, whatever the technology, all land drains have a finite life and eventually become ineffective due to the ingress of silt and/or the blocking of the surrounding filter media.
A French drain [1] (also known by other names including trench drain, blind drain, [1] rubble drain, [1] and rock drain [1]) is a trench filled with gravel or rock, or both, with or without a perforated pipe that redirects surface water and groundwater away from an area.
Surface drainage of the land Drainage system (geomorphology), pattern of natural drains, streams, rivers, etc. Land drainage in the United Kingdom - a legal and operational term in the UK to define a range of functions and responsibilities of drainage boards. Surface runoff, surface runoff of excess rainfall from the land
It includes oceanic sea drainage basins which have hydrologically coherent areas (oceanic seas are set by IHO convention). The oceans drain approximately 83% of the land in the world. The other 17% – an area larger than the basin of the Arctic Ocean – drains to internal endorheic basins.
In geotechnical engineering, watertable control is the practice of controlling the height of the water table by drainage.Its main applications are in agricultural land (to improve the crop yield using agricultural drainage systems) and in cities to manage the extensive underground infrastructure that includes the foundations of large buildings, underground transit systems, and extensive ...
The Beverley and Barmston Drain is the main feature of a land drainage scheme authorised in 1798 to the west of the River Hull in the East Riding of Yorkshire, England.The area consisted of salt marshes to the south and carrs to the north, fed with water from the higher wolds which lay to the north, and from inundation by tidal water passing up the river from the Humber.
In the United Kingdom the Land Drainage Act 1991 decrees drainage of land in England and Wales, but does not cover sewerage and water supplies but the actual process of draining land itself. The act defines who is responsible for various aspects of land drainage and the different areas in which the law applies. [3]
A drainage basin is an area of land in which all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the drainage divide , [ 1 ] made up of a succession of elevated features, such as ridges and hills .
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