What is one type of rooftop disconnection allowed for stormwater management?

A simple disconnection is a method employed in stormwater management where rooftop runoff is redirected away from traditional drainage systems and allowed to flow onto pervious surfaces, such as lawns, gardens, or other vegetated areas. This approach helps facilitate the natural absorption of rainwater into the ground, reducing the volume of water that enters the storm sewer system and lowering the risk of flooding and erosion.

This method is advantageous because it promotes groundwater recharge and can effectively filter pollutants as water percolates through soil layers. As such, it is a widely accepted practice in sustainable stormwater management strategies.

In contrast, the other options are less commonly used or are not standard categories recognized in stormwater management practices. Complex disconnection typically involves more intricate systems that may not be feasible for all projects. Combination disconnection suggests the integration of various methods, which may increase complexity without clear hydrologic benefits. Restricted disconnection could refer to limitations placed on certain areas but doesn't denote a recognized method of stormwater management.