The primary function of bibliographic citations is to assist the reader in finding the sources used in the writing of a work. To these basic citations, the annotated bibliography adds descriptive and evaluative comments (i.e., an annotation), assessing the nature and value of the cited works. The addition of commentary provides the future reader or researcher essential critical information and a foundation for further research.
French drain. A French drain or weeping tile (also blind drain, rubble drain, rock drain, drain tile, perimeter drain, land drain, French ditch, sub-surface drain, sub-soil drain or agricultural drain) is a trench filled with gravel or rock or containing a perforated pipe that redirects surface water and groundwater away from an area.
Bog area in landscape. Landscaping plants can be a great drainage solution for areas with a small amount of excess water. Red-twig dogwoods, willows, and many native plants in each region are well-adapted to periodic bog conditions. French drain. A French drain is the most well-known type of outdoor drainage system. While the specifics vary, a French drain is usually comprised of a perforated pipe which is surrounded by gravel then wrapped in filter fabric to keep mud and particles out.