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 Ground Gutter. A linear French drain is simply a moat, or gutter-in-the-ground, that protects your yard or house from sub-surface or surface water. You construct it by digging a 6 inch wide trench approximately 24 inches deep. If you want to intercept sub-surface water to dry out your yard, you install the trench along the highest part of your property. Extend the trench to the lowest part of your yard.