During dry swale construction, how should the contributing drainage area be managed prior to installation?

The appropriate approach for managing the contributing drainage area prior to the construction of a dry swale is to ensure that it is stabilized before installation. Stabilizing the area involves implementing measures that protect soil from erosion and degradation, which is critical for maintaining the integrity of the swale and ensuring its effectiveness once constructed.

A stabilized area helps prevent sediment and other debris from entering the swale during construction, which can compromise its function. Additionally, stable vegetation and soil can assist in water absorption and facilitate drainage, which are essential for the swale's design purpose. By preparing the area in this way, you ensure that the downstream water quality objectives are met and that the dry swale can function properly during rainfall events.

Other options suggest either leaving the area unstabilized, saturating it with water, or allowing it to operate under wet conditions, which could lead to erosion, sedimentation, and ultimately reduce the efficiency of the stormwater management system being put in place. Ensuring stabilization prior to installation maximizes the swale's long-term performance and reduces construction-related impacts.