This tool assists in determining the appropriate grade for a subsurface drainage system designed to redirect water away from a structure or landscape. It functions by calculating the necessary decline per linear foot or meter required for effective water flow within the drain. For instance, if a drainage line extends 50 feet, the calculator helps establish the total vertical drop needed to ensure proper functionality, usually expressed as inches per foot.
Proper grading is crucial for the long-term effectiveness of such drainage systems. Insufficient slope can lead to standing water within the drain, promoting sediment buildup and eventual clogging. Excessive slope, while less common, can cause water to flow too rapidly, reducing its capacity to effectively collect water along its length. Historically, determining the ideal slope involved manual calculations and surveying techniques. The availability of these calculation tools streamlines this process, contributing to more efficient and accurate installations.
