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.
A sump pit is usually installed inside the basement of your home. The drain tile pipe runs beneath the footer to this sump. The collected water is then mechanically pumped from the sump. A French drain is a large subterranean pit filled with gravel. The drain tile pipe runs to this pit and the water fills this pit.French drains do not work well in areas where the water table rises above the level of the basement floor.he drain tile (pipe), the filter media (gravel), the gravel cover, and the water outlet. All of these elements must be installed for the system to function properly. The drain tile or pipe is usually 4 in diameter and is perforated or has pre-drilled holes along its length.