What is a characteristic of open-grid pavement?

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试卷: LEED GA模拟题E[查看]
What is a characteristic of open-grid pavement?
A: Vegetation can grow in it
B: It is 100% impervious
C: It is at least 75% impervious
D: It is at least 50% impervious

参考答案: A

本题解释:
Notes:

Reference: LEED for Existing Buildings: Operations & Maintenance Reference Guide, Glossary

Open grid pavement is pavement that is less than 50% impervious and contains vegetation in the open cells.

Here is an example of open grid pavement:

http://i.treehugger.com/files/th_images/hastings.jpg

Open grid pavement is different than pervious pavement.

Pervious pavement is designed to allow percolation or infiltration of stormwater through the surface into the soil below where the water is naturally filtered and pollutants are removed. In contrast normal pavement is an impervious surface that sheds rainfall and associated surface pollutants forcing the water to run off paved surfaces directly into nearby storm drains and then into streams and lakes.

Here is an example of pervious pavement:

http://www.us-concrete.com/images/news_pervious_a.jpg