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A glimpse into weep dynamics

Cris

Having not visited the weep for six months or so I found myself stopping by twice within a month. We have come to think of this interesting site, a small drainage along the Southern Pacific rail tracks, as home to populations of micro-organisms that vary overrelatively short periods of time and distance.

Change at the weep

Views of the weep taken using the carp pole three weeks apart.

While reviewing photographs taken from the carp pole I was struck by how much change had occurred in just a three week period. These two shots, taken from slightly different positions, show the wet area of the weep shrinking considerably in three weeks and some bright green growth of mid-March shifting to whitish residue. These effects can be seen in the larger versions of the panoramas referenced in the two preceding posts.

It is interesting that the Salt Pond A15 shoreline, just a few meters from the weep site, also showed fairly dramatic change over the same three week period.

Change at Salt Pond A15

Shoreline views of Salt Pond A15 taken just opposite the weep.

Salt Pond A15’s water was a rich, turbid green in March. Three weeks later the pond was filled with water that was much less turbid and less colorful, unusually so for this pondl. My guess is that A15 was drained and refilled between visits. If this is true I wonder if it had an effect on moisture in the weep? Wayne and I have another visit scheduled for the weep on April 18th. I wonder what awaits after another three weeks have passed?

And here by way of addendum is a brief report from a subsequent visit on 18 April, 2009 (my third in a five week period). By mid-April the weep had dried out even more, so much so that Wayne had a difficult time finding sample sites with a modicum of standing water.

I staged a kite aerial photo session for the benefit of visiting students from Ohio State University and gathered a stretch panorama of the weep to compare with the view from two weeks ago:

Weep panorama comparison

Additional photographs from this third visit are available on Flickr.

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