Sampling Events

The crew at UC Davis, including members of ICE and AEAL, are sampling several sites located throughout the Lower Russian River watershed for a number of water quality constituents as it relates to the Pathogen TMDL. Over the course of the 2008-2009 Water Year, the crew will conduct several wet season sampling events, which are described in this section in more detail.

December 19th, 2008

After receiving less than 0.1” of rain during the first thirteen days of December, 0.49” of rain were recorded in Santa Rosa from Dec 14th-15th. No rain was recorded for December 16-17. A second weather system moved in on Thursday, December 18 dropping 0.17” of rain from 14:00-20:00. Rainfall began again around midnight on the 18th. Over the course of the next four hours approximately 0.23” of rain was recorded until the storm had passed through around 4AM on December 19. Runoff sampling began that morning with the first sample collected at Copeland Creek at 08:20 and the last sample collected at 16:10 at Prince Memorial Greenway.


January 23rd, 2009

Despite a low rainfall total, the crew proceeded with the sampling event with the intent of using these data as a "wet season baseline".   The rain did finally begin to fall lightly at 13:30 and continued through the last of our sites two hours later.

Due to the rainfall delay the crew was unable to visit the last site, Upper Santa Rosa Creek, and still make the 16:00 deadline set by the lab for sample delivery.  The crew was able to visit all of the other sites, and the following are observations from this sampling day (if a site has no comments, there was nothing unusual to report).

February 6th, 2009

Sampling event turned out to be a better than expected day precipitation-wise.  About 0.3” had fallen in the Santa Rosa area during the previous 24 hours.  By 10:00 AM the 24 hour total was up to 0.7”.  Runoff was evident at every site we visited.  All sites were sampled during this sampling event.

February 17th, 2009

It rained steadily throughout the morning up until about 16:00. All streams were high and off-color with runoff. Gutters and ditches alongside roads were all carrying substantial runoff. We were only able to collect samples for seven of the 12 sites due to unexpected lab limitations. We priortized our sampilng by looking at the data from the first two sampling events.

Sites Sampled: Copeland Creek, Foss Creek, Laguna de Santa Rosa, Laguna de Santa Rosa at the confluence, Lower Atascadero Creek at Green Valley Road, Atascadero Creek at Bodega Hwy, and Prince Memorial Greenway.


February 23th, 2009

March 2-3, 2009