Hanson Hardscapes' Aquaflow permeable paving system manages stormwater runoff in a sustainable way. The system consists of bevel-edged pavers with slight gaps to allow water drainage and a layer of geotextile that helps filter pollutants before they get to the groundwater. According to the manufacturer, water flows through the pavement surface at a rate of approximately 354 inches per hour. Hanson Hardscapes, 800.265.6496; www.hansonhardscapes.com.weaetxdyvaydzcwq