Monday, February 7, 2011

The Panther Hollow Lake 'Delta'


As water flows into Panther Hollow Lake from Panther Hollow Run, it slows down. This causes it to drop sand and other coarse sediment near where it enters the lake. The resulting formation is a small delta, with features also found in much larger deltas.
This delta, as well as silt and clay deposited elsewhere in the lake, are leading to the lake filling with sediment, which results in a smaller, muddier, and more polluted (due to shallow water becoming warmer in the summer) lake.

Delta Up Close
Although it is not readily evident, largely because changes in water level affect how large it looks, the delta is slowly expanding.

The following is a progression of photos of the delta, from the Schenley Park Bridge.  Changes in the size of the delta are in part due to the water level in the lake, but you can still get a feel for how the delta changed over the last 6 months or so. 
Panther Hollow Lake 'Delta'
June 4, 2010

Delta At High Water
June 7, 2010, after flash flooding. Note the much higher lake level.

July Delta
July 19, 2010

July 26 Delta
July 26, 2010

Frozen Delta
Jan 10, 2010.


  1. I noticed the delta walking to school today and ran Google image search to see more of it because I didn't have time to inspect it further. Thanks for the great shots and info; I was positive I wouldn't find anything!

  2. Replies
    1. Certainly! Sorry I missed this comment by two years... I was checking it out agait.