What type of drain is designed to intercept groundwater or seepage?

The type of drain designed to intercept groundwater or seepage is a subdrain. Subdrains are specifically engineered to collect and convey ground or seep water away from construction sites or areas where excess moisture can cause issues such as flooding or instability. These drains typically consist of a perforated pipe surrounded by gravel or aggregate, which allows water to enter while filtering out larger particles.

Understanding the purpose of a subdrain helps clarify its role in managing groundwater and controlling moisture levels in soil, which is essential in preventing erosion and maintaining the integrity of structures. In various projects, subdrains can be crucial in redirecting water to appropriate outlets or drainage systems, thus reducing hydrostatic pressure on foundations and helping to maintain proper site drainage.

Other types of drains, while useful in their own contexts, may serve different purposes. For instance, a seepage trench allows water entry without channeling, while a French drain incorporates a specific trench and gravel design but may not primarily target groundwater interception. A perforated drain is a broader category and refers to a pipe that allows water in, but without the specific design focus on intercepting groundwater, as seen in subdrains.