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Drainage equation. A drainage equation is an equation describing the relation between depth and spacing of parallel subsurface drains, depth of the watertable, depth and hydraulic conductivity of the soils. It is used in drainage design. A well known steady-state drainage equation is the Hooghoudt drain spacing equation.
Hydraulic conductivity. In science and engineering, hydraulic conductivity (K, in SI units of meters per second), is a property of porous materials, soils and rocks, that describes the ease with which a fluid (usually water) can move through the pore space, or fracture network. [1]
A hopper barge is a type of barge commonly designed to transport commodities like coal, steel, rocks, sand, soil and waste. [1] '. Hopper barge' can also refer to a barge that dumps cargo at sea. These are now commonly called 'split hopper barge', because they split along the length of the hull. Split hopper barges can be non-propelled or self ...
Ship stability. Ship stability is an area of naval architecture and ship design that deals with how a ship behaves at sea, both in still water and in waves, whether intact or damaged. Stability calculations focus on centers of gravity, centers of buoyancy, the metacenters of vessels, and on how these interact.
The Unified Soil Classification System (USCS) is a soil classification system used in engineering and geology to describe the texture and grain size of a soil. The classification system can be applied to most unconsolidated materials, and is represented by a two-letter symbol. Each letter is described below (with the exception of Pt): If the ...
Topsoil is composed of mineral particles and organic matter and usually extends to a depth of 5-10 inches (13–25 cm). Together these make a substrate capable of holding water and air which encourages biological activity. There are generally a high concentration of roots in topsoil since this is where plants obtain most of their vital nutrients.
Used mainly to determine the minimum water depth for safe passage of a vessel and to calculate the vessels displacement (obtained from ships stability tables) so as to determine the mass of cargo on board. Draft, Air – Air Draft/Draught is the distance from the water line to the highest point on a ship (including antennas) while it is loaded ...
20 feet container size is: 20 ft (6.1 m) length by 8 ft (2.4 m) width by 8.6 ft (2.6 m) height. 40 feet container size is: 40 ft (12 m) length by 8 ft (2.4 m) width by 8.6 ft (2.6 m) height. Container vessels are built to contain as many containers as possible, accordingly the vessels are divided into sections: