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.
French Drain is a perforated pipe surrounded by gravel. Used in low spots in yard or in crawl space and usually will have a couple catch basins attached to the system. How it works-Water floods UP from the bottom of the trench and into the Holes of the perforated pipe. The allows the water to flow away from the area and discharge to the street, storm or a sump pump. How To Instal French Drain.