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Permeable Design : Location

9/20/2012

8 Comments

 
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Location is Everything.
While designing paving systems, you must consider location.  It rains DIFFERENTLY in California than Alabama. Each system can have a number of different soils, each draining and retaining water DIFFERENTLY.  Lets take a deeper look into how rain events, annual precipitation and soil type effect permeable paving systems.

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  The US is divided into 4 rain event classes.
  • Type I – Parts of CA, AK and HI with wet winters and dry summers.
  • Type IA (least intense) – Pacific NW maritime region with wet winters and dry summers.
  • Type II (most intense short duration rainfall) – Most of the U.S. not directly affected by ocean climates.
  • Type III – Gulf of Mexico & Atlantic coast where tropical storms bring large 24-hour rainfall amounts
      LEARN MORE ABOUT STORM TYPES >>

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It rains MORE in the Appalachians than Death Valley.  Canada and U.S. precipitation averages are as follows:  
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Furthermore, different locations contain different soils.  Those different soils have different carrying capacities for water and different infiltration rates.  The infiltration rate is a key component to the sizing formula discussed in the previous lesson section.
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USCS Soil Classification Chart

Other Lesson Components ::

Overview
Sizing
-- Exercise --
8 Comments
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7/17/2013 08:19:52 pm

I think this is the best site on the internet where I can learn about the construction and especially the engineering of paving. The Permeable Design is a good article and you have shown some important location for such designs. Thanks a lot.

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