Land and Water:

The Changing Hydrology and Ecology of Philadelphia
Professor David Hewitt

This course is co-sponsored by the Pennsylvania Horticultural Society.  The lectures will be given at the PHS offices, 100 N. 20th Street (20th and Arch Streets), Philadelphia.

This course requires preregistration.

This course is full.

Add your name to the waitlist online here or call 215-763-6529 x23.


  1. Monday, March 31, 2014 - Hydrology

    How does water moves through ecosystems?  How does urbanization affect hydrology?

  2. Monday, April 7, 2014 - Soils

    How do soils develop and degrade?  How do urban soils differ from other soil types?

  3. Monday, April 14, 2014 - Wetlands
    What are wetlands and how they function? What are the effects of urbanization on wetlands?
  4. Monday, April 21, 2014 - Historic Wetland Case Study

    FDR Park and League Island

  5. Monday, April 28, 2014 - Historic Waterway Case Study
    Wingohocking Creek
  6. Monday, May 5, 2014 - Changes
    ***This class will be held at the Wagner Free Institute of Science***
    An overview of changes in hydrology and land use of Philadelphia from the 17th century to the present

There will be an optional field trip on a Saturday.

This course will provide a survey of the changing wetlands and waterways of Philadelphia, and how these have interacted with, effected changes in, and been affected by the flora, fauna, and human land use of the region.   We will discuss the scientific background of these processes and through case studies gain an understanding of their impact on Philadelphia’s ecosystem.

Recommended Readings:

Leopold and Langbein (1960), A Primer on Water

USDA NRCS Urban Soils Primer

EPA Wetlands Fact Sheets

Franklin Delano Roosevelt Park Master Plan. Horwitz et al. 1999.

Tacony Creek Park Master Plan. Horwitz et al. 1999.





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