subsurface drainage

Written by

The Information Architects of Encyclopaedia Britannica

Last updated

July 14, 2026

Quick Summary

Subsurface drainage is the artificial removal of excess water from beneath the soil's surface. This process is crucial in agriculture for managing soil moisture, preventing waterlogging, and improving conditions for crop growth.123

Subsurface drainage systems typically involve underground conduits, often called tiles or drains, that collect and transport groundwater away from the root zone. These systems are particularly effective in soils with a high sand or silt content, which allows water to move through them more readily.431

Key benefits of subsurface drainage include:
* Allowing soil to warm up faster in the spring.
* Providing plants with a larger volume of soil for root development.
* Maintaining a better balance of soil aeration and bacterial action.
* Preventing the accumulation of salts in irrigated areas.13

Planning a subsurface drainage system requires consideration of soil type, land topography, rainfall patterns, and the specific crops being grown.1

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

4 Britannica Sources

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.

soil
Water runoff
Subsurface runoff cannot easily penetrate the clay layer and flows laterally along the horizon as it moves toward the stream system. This type of runoff is slower than its erosive counterpart over the land surface and leads to water saturation of the upper part of…
Read More
Subsurface runoff cannot easily penetrate the clay layer and flows laterally along the horizon as it moves toward the stream system. This type of runoff is slower than its erosive counterpart over the land surface and leads to water saturation of the upper part of…
Read More

horticulture
Water management
In subsurface drainage open ditches and tile fields intercept groundwater and carry it off. The water enters the tiling through the joints, and drainage is achieved by gravity feed through the tiles.
Read More
In subsurface drainage open ditches and tile fields intercept groundwater and carry it off. The water enters the tiling through the joints, and drainage is achieved by gravity feed through the tiles.
Read More