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2. Permeable paving - Wikipedia

   en.wikipedia.org/wiki/Permeable_paving

   Permeable paving demonstration Stone paving in Santarém, Portugal. Permeable paving surfaces are made of either a porous material that enables stormwater to flow through it or nonporous blocks spaced so that water can flow between the gaps. Permeable paving can also include a variety of surfacing techniques for roads, parking lots, and ...

3. Low-impact development (U.S. and Canada) - Wikipedia

   en.wikipedia.org/wiki/Low-impact_development_(U...

   Pervious concrete, also called "porous pavement", similar to Permeable paving; Grassed swales, also known as bioswales. [12] Commercially manufactured stormwater management devices that capture pollutants (e.g., media filters) and/or aid in on-site infiltration. Tree pits [13]

4. Pervious concrete - Wikipedia

   en.wikipedia.org/wiki/Pervious_concrete

   A pervious concrete street in 2005. Pervious concrete (also called porous concrete, permeable concrete, no fines concrete and porous pavement) is a special type of concrete with a high porosity used for concrete flatwork applications that allows water from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing groundwater recharge.

5. FreeCAD - Wikipedia

   en.wikipedia.org/wiki/FreeCAD

   FreeCAD is a general-purpose parametric 3D computer-aided design (CAD) modeler and a building information modeling (BIM) software application with finite element method (FEM) support. [4] It is intended for mechanical engineering product design but also expands to a wider range of uses around engineering, such as architecture or electrical ...

6. Types of concrete - Wikipedia

   en.wikipedia.org/wiki/Types_of_concrete

   Pervious concrete, used in permeable paving, contains a network of holes or voids, to allow air or water to move through the concrete This allows water to drain naturally through it, and can both remove the normal surface-water drainage infrastructure, and allow replenishment of groundwater when conventional concrete does not.

7. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!