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An agricultural drainage system is a system by which water is drained on or in the soil to enhance agricultural production of crops. It may involve any combination of stormwater control, erosion control, and watertable control. While there are more than two types of drainage systems employed in agriculture, there are two main types: (1) surface drainage and (2) sub-surface drainage. Figure 1 classifies the various types of drainage systems. It shows the field (or internal) and the main (or external) systems. The function of the field drainage system is to control the water table, whereas the function of the main drainage system is to collect, transport, and dispose of the water through an outfall or outlet. In some instances one makes an additional distinction between collector and main drainage systems. Field drainage systems are differentiated in surface and subsurface field drainage systems. Sometimes (e.g., in irrigated, submerged rice fields), a form of temporary drainage is required whereby the drainage system is allowed to function only on certain occasions (e.g., during the harvest period). If allowed to function continuously, excessive quantities of water would be lost. Such a system is therefore called a checked, or controlled, drainage system. More usually, however, drainage systems are meant to function as regularly as possible to prevent undue waterlogging at any given time and it is this regular drainage system that is most often employed. In agricultural literature, this is sometimes also called a "relief drainage system". The regular surface drainage systems, which start functioning as soon as there is an excess of rainfall or irrigation applied, operate entirely by gravity. They consist of reshaped or reformed land surfaces and can be divided into: Bedded systems, used in flat lands for crops other than rice; Graded systems, used in sloping land for crops other than rice. The bedded and graded systems may have ridges and furrows.

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Concepts associés (17)

Cours associés (6)

Séances de cours associées (40)

ENV-549: Irrigation and drainage engineering

The course aims at teaching the fundamentals of both irrigation and drainage techniques with particular attention to the soil water balance and related management, the materials, the construction meth

CIVIL-404: Underground construction technology

Pour acquérir une connaissance approfondie de l'espace et des travaux souterrains, y compris la planification, la gestion, les techniques de construction, l'évaluation de risques, et les considération

CIVIL-413: Urban hydraulic systems

Sustainable freshwater and urban drainage system are considered. For fresh water, the capture, reservoir and net are discussed. For the drainage, hydrology as well as the individual conduit and manh

Watertable control

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 utilities (water supply networks, sewerage, storm drains, and underground electrical grids).

Drainage research

Drainage research is the study of agricultural drainage systems and their effects to arrive at optimal system design. Agricultural land drainage has agricultural, environmental, hydrological, engineering, economical, social and socio-political aspects (Figure 1). All these aspects can be subject of drainage research. The aim (objective, target) of agricultural land drainage is the optimized agricultural production related to: reclamation of agricultural land conservation of agricultural land optimization of crop yield crop diversification cropping intensification optimization of farm operations.

Drainage system (agriculture)

Explore les défis et les solutions innovantes pour la gestion des eaux pluviales urbaines dans les villes d'Afrique subsaharienne.

Explore le drainage d'un mince film liquide dans une cavité cylindrique.

Explore les défis et les solutions pour le drainage des eaux pluviales urbaines dans les villes d'Afrique subsaharienne.