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 Vol. 2, Issue 1: Oct 8, 2007 |
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Key Highlights New and Improved Website 2007 Adult Migration Monitoring San Joaquin River Conditions |
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October 1-October 21, 2007 |
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Key Highlights:New and Improved Website. Over the next couple of months, the San Joaquin Basin stakeholders will be unveiling a new and improved website, sanjoaquinbasin.com, to share fisheries and environmental information. The website will include information relevant to the the San Joaquin River and its tributaries including information on fisheries monitoring activities, environmental data, restoration information, and key documents pertinent to individual tributaries. Existing websites such as stanislausriver.com and calaverasriver.com will be merged into the sanjoaquinbasin.com website so information on all rivers can easily be accessed through a single website. 2007 Adult Migration Monitoring. Adult salmonid migration monitoring began at the Stanislaus River weir for the fifth consecutive year. Monitoring is scheduled to continue until the fall-run Chinook migration is complete (i.e., December or January). San Joaquin River Conditions. San Joaquin River flows continue to remain low (i.e., approximately 1,000 cfs) while tributary reservoirs continue to conserve water following a lower than average year of precipitation. We encourage subscribers to contribute any relevant information for future issues of the newsletter (e.g., additional monitoring studies, announcements of upcoming meetings and events, etc). If you would like to contribute, please contact Chrissy Sonke. If you have any questions please contact Doug Demko at 530-342-9262 or by e-mail at dougdemko@fishbio.com. To view a print version of this newsletter, click here. |
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Upcoming EventsOct. 11: SRFG Meeting
Featured LinksScience News
Related LinksTuolumne River Technical Advisory Committee |
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| New and Improved Website
Over the next couple of months, San Joaquin Basin stakeholders will be unveiling a new improved website, sanjoaquinbasin.com, to share fisheries and environmental information. When completed, the site will contain quick links to environmental information, such as flow, temperature, and dissolved oxygen for the San Joaquin River and its tributaries. The website will include bi-weekly summaries of research in the basin, such as adult Chinook weir and carcass counts, juvenile outmigration results, as well as other fisheries related activities. The website will also include information about restoration activities and will provide links to documents related to each of the rivers. The bi-weekly summaries can currently be found at www.sanjoaquinbasin.outmigrant.com until the new website is up and running. You can subscribe to receive a notification and link to the current summary by sending an e-mail to subscribe@sanjoaquinbasin.com.
2007 Adult Migration Monitoring
Stanislaus River Stakeholders, in cooperation with the USFWS and CDFG, are monitoring adult Chinook salmon escapement in the Stanislaus River with an infrared scanner and portable resistance board weir. This marks the fifth consecutive year of monitoring at the Stanislaus River weir. More details, including pictures and video will soon be available on the Stanislaus River page of the new improved sanjoaquinbasin.com website. The Stanislaus River weir was installed between September 19 and September 21 in the same location as past years, i.e., approximately two river miles downstream of Jacob Meyers Park (RM 31.4) near the town of Riverbank. Monitoring began immediately following installation on the afternoon of September 21 and will continue until fall-run Chinook migration is complete (i.e., December or January). Due to permitting and contractual issues, weir installation was delayed and operation did not begin until about two to three weeks later than preceding years (i.e., weir began operating as early as September 5 and as late as September 10 from 2003-2006). Based on the percent of the total run that passed upstream of the weir prior to September 21 in previous years (i.e., 0.02% to 1.3% of total run), it is anticipated that the number of fish not counted due to delayed installation and operation was very low. A net total of 23 Chinook were recorded as they passed upstream of the weir between September 21 and September 30 (daily range: zero to six). Other fish species observed included Sacramento suckers and largemouth bass. Environmental conditions at the weir remained stable between September 21 and September 30. Releases from Goodwin Dam (GDW; RM 58.4) averaged 154 cfs; flow at Orange Blossom Bridge (OBB; RM 46.9) averaged 213 cfs; and flow at Ripon (RIP; RM 15) averaged 252 cfs. Note: flows downstream of Goodwin Dam are often higher than dam releases due to irrigation returns. Turbidity at the weir site ranged from 0.85 NTU to 2.0 NTU and DO averaged 9.8 mg/L. DO downstream of the weir at Ripon (RM 15) ranged from 8.0 mg/L to 8.6 mg/L. Daily instantaneous water temperature at the Stanislaus River weir ranged from 61.8 ºF to 63.0 ºF. Since temperatures are above 60 ºF (i.e., the maximum temperature at which we are permitted to handle salmonids), trapping will be postponed until Chinook passage increases and daily instantaneous temperatures decrease below 60 ºF. Once trapping commences, we will be trapping on a "two days on two days off" schedule to collect biological data and to continue to test the accuracy of the Vaki RiverWatcher system.
San Joaquin River ConditionsFlow in the San Joaquin River was approximately 1,000 cfs at Vernalis during September which is typical for years with lower than average precipitation. Water temperatures in the San Joaquin River decreased throughout the month as overnight ambient air temperatures decreased and ranged from 66.2 °F to 81.2 °F (avg: 72.2 °F). Monthly average water temperature was approximately 5 °F cooler than in July and August. Dissolved oxygen (DO) in the San Joaquin River at Mossdale fluctuated between 7.4 mg/L and 10.7 mg/L (avg: 9.2 mg/L); whereas, DO at Rough 'n Ready Island (RRI) increased throughout the month ranging from 4.9 mg/L to 6.6 mg/L (avg: 5.7 mg/L).
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© 2007 FISHBIO Environmental, LLC • 3188 Wood Creek Drive, Chico, CA 94928 Data Disclaimer: The data displayed on the sanjoaquinbasin.com website are courtesy of California Department of Fish & Game (CDFG), U.S. Fish & Wildlife Service (USFWS), Tri-dam, Turlock Irrigation District (TID), Modesto Irrigation District (MID) and FISHBIO. Data are intended to be current, but are preliminary and are not guaranteed to be accurate. Source data compiled and provided by FISHBIO, from whom further information can be obtained. Use or reproduction of this data is prohibited without prior permission of CDFG, USFWS, Tri-dam, TID, MID and/or FISHBIO. |