Wells

Monitoring wells are frequently installed on infiltrating systems such as bioretention, bioswales, infiltration trenches and hybrids thereof. The two questions most frequently addressed are:

1. How quickly is surface ponding being infiltrated beneath the surface?
2. How quickly is the facility draining through exfiltration to native soils and/or through an underdrain?

• Where possible, wells for measuring water levels within permeable pavement systems should be outside of trafficked areas.

The downward movement of water through the soil, the downward flow of runoff from the bottom of an infiltration BMP into the soil.

Loss of water from a drainage system as a result of percolation or absorption into the surrounding medium (e.g., the infiltration of water into the native soil through a perforated pipe wall as it is conveyed).