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Trench drains are commonly confused with French drains, which consist of a perforated pipe that is buried in a gravel bed, and which are used to evacuate ground water. A slot drain , also wrongly associated with a trench drain, consists of a drainage pipe with a thin neck (or slot) that opens at the ground surface with sufficient opening to ...
A diagram of a traditional French drain. 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.
The pipes proceed straight down, about two metres, to a horizontal cross-pipe; this pipe is the secondary system. About ten per cent of the surface area of a horizontal pipe is then perforated slightly and surrounded by gravel. Initially, runoff will exit the pipe and infiltrate the gravel to the soil beyond, dissipating naturally. As flow ...
Usually, pipe drains or ditches are preferable to wells. However, when the soil consists of a poorly permeable top layer several meters thick, overlying a rapidly permeable and deep subsoil , wells may be a better option, because the drain spacing required for pipes or ditches would be considerably smaller than the spacing for wells.
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'Today' star Hoda Kotb shared her 2024 holiday card with daughters Haley Joy and Hope Catherine ahead of her leaving the NBC morning show in January 2025.
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