(1) The top sheet is formed of a fluid pervious material, e.g., a fibrous material.(2) Recently, our regional promotion groups have identified what they think of as emerging opportunity in the area of pervious pavements.(3) All around it is limestone, which anyone who has studied geography at school will know is pervious and water disappears through it.(4) Because of the very low water-cement ratio and the open matrix that allows air movement through the concrete matrix, pervious concrete can dry out very quickly.(5) The brownfield site had no trees or pervious surfaces, and it generated a range of environmental problems for the surrounding neighborhood.(6) A green sod roof reduces runoff from impermeable surfaces, while a pervious parking lot allows infiltration of water into the ground.(7) A typical cubic yard of pervious concrete would have 2650 pounds of #89 gravel, 600 pounds of portland cement, and a water-cement ratio of about 0.30.(8) What we're doing is taking some areas that used to be pervious and we're putting a [residence] building there, so the water now gets captured.(9) The City of Seattle currently credits pervious surfaces as stormwater management reduction.(10) The parking lot uses pervious limestone and is landscaped with indigenous plants.(11) The use of impervious surfaces (like pavement and concrete) can be minimized and replaced with pervious surfaces (like stone and gravel) whenever possible.
