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2. Topsoil - Wikipedia

   en.wikipedia.org/wiki/Topsoil

   Topsoil is composed of mineral particles and organic matter and usually extends to a depth of 5-10 inches (13–25 cm). Together these make a substrate capable of holding water and air which encourages biological activity. There are generally a high concentration of roots in topsoil since this is where plants obtain most of their vital nutrients.

3. North Campus Open Space - Wikipedia

   en.wikipedia.org/wiki/North_Campus_Open_Space

   North Campus Open Space (NCOS) is a 136-acre wetland and upland restoration project (55 ha) in Goleta, California.Managed by the Cheadle Center for Biodiversity and Ecological Restoration (CCBER), a research center under the Office of Research at the University of California, Santa Barbara (UCSB), the property had been previously developed into a golf course.

4. Impervious surface - Wikipedia

   en.wikipedia.org/wiki/Impervious_surface

   An estimation of PIMP is given by PIMP = 6.4J^0.5 where J is the number of dwellings per hectare (Butler and Davies 2000). For example, woodland has a PIMP value of 10%, whereas dense commercial areas have a PIMP value of 100%. This variable is used in the Flood Estimation Handbook. Graph of impervious surface coverage in the US. [5] [6]

5. List of pipeline accidents in the United States in the 1990s

   en.wikipedia.org/wiki/List_of_pipeline_accidents...

   The Lodge Grass section of pipeline resulted in 3,400 feet of new pipeline being buried 6 feet deep to avoid soft soil, deeper than the required 3 feet of soil coverage. [198] [199] July 21 – A gas pipeline was ruptured, causing an explosion and fire in Indianapolis, Indiana. A 20-inch steel natural gas transmission pipeline was ruptured by a ...

6. AOL Mail

   mail.aol.com

   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!

7. Soil sealing - Wikipedia

   en.wikipedia.org/wiki/Soil_sealing

   Soil sealing or soil surface sealing is the loss of soil resources due to the covering of land for housing, roads or other construction work. [1] Covering or replacing the topsoil with impervious materials like asphalt and cement as a result of urban development and infrastructure construction paired with compaction of the underlying soil layers results in the mostly irreversible loss of ...