Exciting drainage swales in urban areas
Traditional engineering tries to remove as much rainwater as fast as possible. Rain falls, pavement directs it into storm sewers. Outa sight, outa mind. More recent storm water management for Ottawa streets reduces the permeability of the catch basin grate so water self-stores on the street (that’s “puddles” to the rest of us) and runs off over time. Preston has this feature. Unfortunately, it makes walking the sidewalks within an hour or two of rainfalls a drenching experience. Some puddles remain for 24 hours. It rains a lot in the pacific northwest. They have installed a lot of “drainage swales” in … Continue reading Exciting drainage swales in urban areas