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Volume 2012/13, Issue 10 
March 12, 2013
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In This Issue
Calaveras River Juvenile Migration Monitoring
Stanislaus River Juvenile Migration Monitoring
Tuolumne River Juvenile Migration Monitoring
Mokelumne River Juvenile Migration Monitoring
Stanislaus River Weir Adult Migration Monitoring
Tuolumne River Weir Adult Migration Monitoring
San Joaquin River Conditions
Delta Exports
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March 13-16

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April 4-6

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Key Highlights
February 18, 2013 - March 3, 2013

Calaveras River Juvenile Migration Monitoring continued at Shelton Road (RM 28) and a total of 7 O. mykiss were captured, increasing the season total to 104.

 

Stanislaus River Juvenile Migration Monitoring continued at Oakdale (RM 40) and a total of 20,724 Chinook salmon were captured, increasing the season total to 127,034. Monitoring at Caswell Memorial State Park (RM 9) continued and a total of 3,460 Chinook salmon were captured, increasing the season total to 12,553. 

 

Tuolumne River Juvenile Migration Monitoring continued at Waterford (RM 30) and a total of 779 Chinook salmon were captured, increasing the season total to 2,278. Monitoring continued at Grayson (RM 5) and one Chinook salmon was captured, increasing the season total to 2.

 

Mokelumne River Juvenile Migration Monitoring continued at Vino Farms (RM 54) and a total of 18,085 Chinook salmon were captured, increasing the season total to 48,803. Monitoring continued at Golf (RM 38) and a total of 849 Chinook salmon were captured, increasing the season total to 1,877.

 

Stanislaus River Weir Monitoring continued and 9 Chinook salmon passed upstream through the weir between February 18 and March 3, increasing the total to 7,058.

 

Tuolumne River Weir Monitoring continued with a total of 3 Chinook salmon passing upstream through the weir between February 18 and March 3, increasing the total to 2,123.

 

San Joaquin River Conditions. San Joaquin River flow at Vernalis ranged from 1,938 cfs to 2,501 cfs. Daily average water temperature in the San Joaquin River ranged from 50.6F to 58.0F at Vernalis, and from 51.1F to 58.8F at Mossdale. Daily average dissolved oxygen (DO) in the San Joaquin River ranged from 9.8 mg/L to 10.7 mg/L at Mossdale, and from 10.0 mg/L to 10.6 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island).

 

Delta Exports.
Combined total exports (state and federal pumps) fluctuated during the reporting period, ranging from 3,882 cfs to 6,425 cfs.

2011/12 Calaveras River Juvenile Migration Monitoring 

The Calaveras River rotary screw trap at Shelton Road (RM 28) operated eight days between February 18 and March 3 and a total of 7 O. mykiss were captured, increasing the total to 104. Daily catches ranged from zero to two individuals (Figure 1), and all O. mykiss captured were Age 1+ (100-299 mm) and were rated as parr (n=2) and silvery parr (n=5). Average forklengths and weights of O. mykiss are provided in Table 1.

No Chinook salmon were captured during this reporting period. The season total remains at two yearlings.

 

Instantaneous temperature recorded at the trap ranged from 49.2F to 54.3F, and turbidity ranged from 0.17 NTU to 1.65 NTU. During the reporting period, daily average combined flow from New Hogan Dam (NHG) and Cosgrove Creek (COS) fluctuated between 23 cfs and 26 cfs, and at Bellota (MRS) flow fluctuated between 7 cfs and 15 cfs (Figure 1).

Table 1. Biosampling data for O. mykiss captured at Shelton Road between February 18 and March 3, 2013. Parenthesis indicates range
.

 

Figure 1. Daily O. mykiss catch at Shelton Road, and Calaveras River flow recorded by New Hogan Dam (NHG) and Cosgrove Creek (COS) combined and flow recorded at Bellota (MRS), in 2012 and 2013.

2011/12 Stanislaus River Juvenile Migration Monitoring  

Stanislaus River rotary screw trap monitoring at Oakdale (RM 40) continued during the reporting period and a total of 20,724 Chinook salmon were captured, increasing the season total to 127,034. Most of the Chinook salmon measured were fry (n=998), but parr (n=2) were also observed (Table 2).

 

No O. mykiss were captured during the reporting period. The season total remains at 21.

 

Table 2. Biosampling data for Chinook salmon and O. mykiss captured and measured at Oakdale between February 18 and March 3, 2013. Parentheses indicate range
.
 


 

Instantaneous temperature taken at the trap ranged from 50.0F to 52.8F, and turbidity ranged from 0.61 NTU to 2.70 NTU. Daily average flow at Goodwin Dam (GDW) ranged from 1,008 cfs to 1,519 cfs, and flow ranged from 1,084 cfs to 1,519 cfs at Ripon (RIP) (Figure 2).

 

Four trap efficiency evaluations were conducted during the reporting period with naturally spawned juvenile Chinook salmon marked caudal fin green (CFG). Preliminary estimates of capture efficiency are provided in Table 3.

 

Table 3. Trap efficiency tests conducted at Oakdale between February 18 and March 3, 2013. 

   

Figure 2. Daily Chinook salmon catch at Oakdale and Stanislaus River flow recorded at Goodwin Dam (GDW) and Ripon (RIP) in 2013.

 

Stanislaus River rotary screw trap monitoring at Caswell Memorial State Park (RM 9) continued during the reporting period and a total of 3,460 juvenile Chinook salmon were captured during the reporting period including 3119 fry and 340 parr, and 1 yearling smolt bringing the season total to 12,204 fry, 346 parr, and three yearling smolts.

 

No O. mykiss were captured during the reporting period. Season total remains at two. 

 

Instantaneous temperature taken at the trap ranged from 47.8F to 54.1F, and instantaneous turbidity ranged from 2.57 NTU to 3.68 NTU. Instantaneous dissolved oxygen measured at the trap ranged from 10.20 mg/L to 12.10 mg/L.

2012 Tuolumne River Juvenile Migration Monitoring 

  

Tuolumne River rotary screw trap monitoring at Waterford (RM 30) continued during the reporting period and a total of 779 Chinook salmon were captured, increasing the season total to 2,278. Most of the measured fish were fry (n=416) but parr (n=103) and smolt (n=2) were also observed (Table 4).

 

Table 4. Biosampling data for Chinook salmon captured and measured at Waterford between February 18 and March 3, 2013. Parentheses indicate range. 

Instantaneous temperature taken at the trap ranged from 50.1F to 56.8F, and turbidity ranged from 0.43 NTU to 2.02 NTU. Daily average flow at La Grange (LGN) was stable between 164 cfs and 167 cfs (Figure 3).

 

Four trap efficiency evaluations were conducted during the reporting period with naturally spawned juvenile Chinook salmon marked caudal fin orange (CFO). Preliminary estimates of capture efficiency are provided in Table 5.

 

Table 5. Trap efficiency tests conducted at Waterford between February 18 and March 3, 2013. 

 
Figure 3. Daily Chinook salmon catch at Waterford and Tuolumne River flow recorded at La Grange (LGN) between January 1 and March 3, 2013.

 

Tuolumne River rotary screw trap monitoring at Grayson (RM 5) continued during the reporting period and one Chinook salmon (FL=55 mm) was captured and rated as parr, increasing the season total to two.

 

Instantaneous temperature taken at the trap ranged from 51.9F to 65.3F, and turbidity ranged from 0.54 NTU to 2.92 NTU. Daily average flow at Modesto (MOD) ranged between 187 cfs and 220 cfs (Figure 4).

 

No trap efficiency evaluations were conducted during the reporting period.

 

   

Figure 4. Daily Chinook salmon catch at Grayson and Tuolumne River flow recorded at Modesto (MOD) between January 1 and March 3, 2013.


2011/12 Mokelumne River Juvenile Migration Monitoring  

The Mokelumne River rotary screw trap at Vino Farms (RM 54) continued sampling intermittently during the reporting period. A total of 18,085 juvenile Chinook salmon were captured, increasing the season total to 48,803.

 

Average daily flow from Camanche Reservoir (CMN) ranged from 256 cfs to 397 cfs (Figure 5). Instantaneous temperature ranged between 47.1F and 48.7F, and instantaneous turbidity ranged between 1.52 NTU and 2.64 NTU.
 

Figure 5. Daily juvenile Chinook catches at Vino Farms and Mokelumne River flow recorded at Camanche Reservoir (CMN), between December 1, 2012, and March 3, 2013.

The Mokelumne River rotary screw trap at Golf (RM 38) continued sampling intermittently during the reporting period. A total of 849 juvenile Chinook salmon were captured, increasing the season total to 1,877.

 

Average daily flow from Woodbridge Dam (WBR) ranged from 88 cfs to 145 cfs (Figure 6). Instantaneous temperature ranged between 48.0F and 52.2F, and instantaneous turbidity ranged between 1.68 NTU and 5.21 NTU
.  
 
Figure 6. Daily juvenile Chinook catches at Golf and Mokelumne River flow recorded at Woodbridge Dam (WBR), between December 15, 2012, and March 3, 2013.

2011 Stanislaus River Weir Adult Migration Monitoring   

 

Between February 18 and March 3, nine Chinook salmon were detected by the Vaki Riverwatcher as they passed upstream of the Stanislaus River weir.The total passage to-date of 7,058 is the highest observed at the Stanislaus weir since monitoring began in 2003 (Figure 5; Table 6). Daily passage ranged between 0 and 2 Chinook salmon (Figure 7).

 

Nine O. mykiss were detected passing upstream, increasing the season total to 66.

 

Instantaneous water temperature measured at the weir ranged between 50.1˚F and 55.7˚F, and daily average water temperature at Ripon (RPN; RM 15) ranged between 50.3˚F and 54.7˚F (Figure 8). Instantaneous turbidity ranged between 0.93 NTU and 6.11 NTU (Figure 9). Instantaneous dissolved oxygen at the weir ranged between 9.71 mg/L and 11.89 mg/L, and daily average dissolved oxygen at Ripon (RPN; RM 15) ranged from 10.10 mg/L to 10.60 mg/L (Figure 10).

 

Daily average flows in the Stanislaus River at Goodwin Dam (GDW; RM 58) ranged from 1,008 cfs to 1,519 cfs. Flows at Ripon (RIP; RM 15) ranged from 1,084 cfs to 1,519 cfs. Note: flows downstream of Goodwin Dam may differ from dam releases due to irrigation, precipitation, and other factors


Table 6. Annual fall-run Chinook passage at the Stanislaus River weir prior to March 3, 2003-2013.
 
 
Figure 7. Daily upstream Chinook passage at the Stanislaus River weir in relation to daily average flows (cfs) recorded in the Stanislaus River at Goodwin (GDW) and Ripon (RIP), 2012/13. 

Figure 8. Daily upstream Chinook passage recorded at the Stanislaus River weir in relation to instantaneous water temperature recorded at the weir, and daily average water temperature recorded in the Stanislaus River at Ripon (RPN), and in the San Joaquin River at Vernalis (VER), Mossdale (MSD) and Rough & Ready (RRI) in 2012/13. 

Figure 9. Daily upstream Chinook passage at the Stanislaus River weir in relation to instantaneous turbidity recorded at the weir in 2012/13. (Note: Turbidity on December 24 was measured at 106.0 NTU.) 

Figure 10. Daily upstream Chinook passage at the Stanislaus River weir in relation to instantaneous dissolved oxygen recorded at the weir, and daily average dissolved oxygen recorded in the Stanislaus River at Ripon (RPN), and in the San Joaquin River at Mossdale (MSD) and Rough & Ready (RRI) in 2012/13.

2011 Tuolumne River Weir Adult Migration Monitoring 

 

Between February 18 and March 3 a total of 3 Chinook salmon were detected by the Vaki Riverwatcher as they passed upstream of the Tuolumne River weir. Total passage to-date of 2,123 is less than the 2,850 passages observed in 2011 at the Tuolumne weir (Table 7). Daily passage, ranged between 0 and 1 Chinook salmon (Figure 11).

 

No O. mykiss were detected during the reporting period. Season total remains at three.

 

Daily average flow in the Tuolumne River ranged from 164 cfs to 167 cfs at La Grange (LGN; RM 50) and 187 cfs and 220 cfs at Modesto (MOD; RM 17). Note: flows downstream of La Grange may be higher than dam releases due to accretion and Dry Creek inflow.

 

Instantaneous water temperature measured at the weir ranged between 55.5˚F and 58.1˚F and daily average water temperature at Modesto (MOD; RM 17) ranged between 53.1˚F and 59.5˚F (Figure 12). Instantaneous turbidity ranged between 0.62 NTU and 1.52 NTU (Figure 13), and instantaneous dissolved oxygen ranged between 10.55 mg/L and 11.78 mg/L (Figure 14).

 

Table 7. Annual Fall-run Chinook passage prior to March 3, 2009 - 2013
.
    

  

Figure 11. Daily upstream Chinook passage at the Tuolumne River Weir in relation to daily average flows (cfs) recorded in the Tuolumne River at La Grange (LGN) and Modesto (MOD), and in the San Joaquin River at Vernalis (VNS) in 2012/13.

Figure 12. Daily upstream Chinook passage at the Tuolumne River Weir in relation to instantaneous water temperature recorded at the weir, and daily average water temperature recorded in the Tuolumne River at Modesto (MOD) and in the San Joaquin River at Vernalis (VER), Mossdale (MSD) and Rough & Ready (RRI) in 2012/13.

 

Figure 13. Daily upstream Chinook passage at the Tuolumne River Weir in relation to instantaneous turbidity recorded at the weir in 2012/13.  

 

Figure 14. Daily upstream Chinook passage at the Tuolumne River Weir in relation to instantaneous dissolved oxygen recorded at the weir, and daily average dissolved oxygen recorded in the San Joaquin River at Mossdale (MSD) and Rough & Ready (RRI) in 2012/13.


San Joaquin River Conditions

During the reporting period, flow in the San Joaquin River at Vernalis fluctuated from 1,938 cfs to 2,501 cfs (Figure 16). Water temperature in the San Joaquin River ranged from 50.6F to 58.0F at Vernalis, from 51.1F to 58.8F at Mossdale, and from 51.1F to 55.1F at Rough 'n Ready Island (Figure 17). Average daily dissolved oxygen (DO) in the San Joaquin River fluctuated from 10.0 mg/L to 10.6 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island), and from 9.8 mg/L to 10.7 mg/L at Mossdale (Figure 18).

 

Figure 16. San Joaquin River flow at Vernalis from March 1, 2012, through March 3, 2013.

      


Figure 17. San Joaquin River daily average water temperature at Vernalis, Mossdale, and Rough 'n Ready from March 1, 2012, through March 3, 2013.


 

Figure 18. San Joaquin River daily average dissolved oxygen at Mossdale and Rough 'n Ready, from March 1, 2012, through March 3, 2013.


Delta Exports

Mean daily pumping at the C.W. Jones Pumping Plant (federal pumps previously known as Tracy Pumping Plant) ranged from 1,184 cfs to 2,967 cfs (Figure 19). Mean daily pumping at the Harvey O. Banks Pumping Plant (state pumps) ranged from 2,383 cfs to 3,464 cfs. Combined total exports (state and federal pumps) during this period ranged from 3,882 cfs to 6,425 cfs.

Figure 19. Daily exports at the state and federal pumping stations from March 1, 2012, through March 3, 2013. 

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Data Disclaimer:  The data displayed on the FISHBIO 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), East Bay Municipal Utility District (EBMUD) 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.