International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage



(5178) Composite drainage system
1 – A subsurface pipe drainage system consisting of field drains, collector drains, and may be main drains. 2 - Drainage system consisting of several drainage methods wherein underground pipes, open ditches and underground conduits are used. 3 - A combination of, for example, the herringbone and gridiron system (illustrated).

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