Before revision: Design thumbnail|Polypropylene soakwell in Perth, Western Australia A dry well is a vertical, underground system that captures surface water from impervious surfaces, then stores and gradually infiltrates the water into the ground .
After revision: Design thumbnail|Polypropylene soakwell in Perth, Western Australia A dry well is a gravity-fed, vertical underground system that captures surface water from impervious surfaces, then stores and gradually infiltrates the water into the ground .