Lower Yuba River Accord Accord Flow and Temperature Performance - - PowerPoint PPT Presentation

▶
lower yuba river accord
SMART_READER_LITE
LIVE PREVIEW

Lower Yuba River Accord Accord Flow and Temperature Performance - - PowerPoint PPT Presentation

Jan 19, 2023 104 likes •326 views

Lower Yuba River Accord Accord Flow and Temperature Performance Yuba Accord River Management Team 5 th Annual Symposium June 12, 2013 Accord Flow and Temperature Overview Flows Temperatures Implementation of Yuba Accord Operations

slide-1
SLIDE 1

Accord Flow and Temperature Performance

Lower Yuba River Accord

June 12, 2013 Yuba Accord River Management Team 5th Annual Symposium

slide-2
SLIDE 2

Lower Yuba River Accord

RMT Symposium, June 2013

2

Accord Flow and Temperature Overview

  • Flows
  • Temperatures
  • Implementation of Yuba Accord Operations
slide-3
SLIDE 3

Lower Yuba River Accord

RMT Symposium, June 2013

3

Flow Schedules

  • Two Compliance Points:
  • Smartsville at 0.5 mi, Marysville at 19 mi
  • Marysville usually controls
  • Six flow schedules, plus a conference year

NOV DEC JAN FEB MAR JUL AUG SEP Annual

1-15 16-31 1-30 1-31 1-31 1-29 1-31 1-15 16-30 1-15 16-31 1-15 16-30 1-31 1-31 1-30 Vol. (TAF)

1

500 500 500 500 500 500 700 1000 1000 2000 2000 1500 1500 700 600 500 574

2

500 500 500 500 500 500 700 700 800 1000 1000 800 500 500 500 500 429

3

500 500 500 500 500 500 500 700 700 900 900 500 500 500 500 500 399

4

400 400 500 500 500 500 500 600 900 900 600 400 400 400 400 400 362

5

400 400 500 500 500 500 500 500 600 600 400 400 400 400 400 400 335

6

350 350 350 350 350 350 350 350 500 500 400 300 150 150 150 350 232

OCT APR MAY JUN

0.5 mi 19 mi

slide-4
SLIDE 4

Lower Yuba River Accord

RMT Symposium, June 2013

4

Flow Schedule Dispatch: North Yuba Index

  • Indexing flow schedules to available water
  • Includes storage
  • Includes current best predictions or actual inflow
  • The North Yuba Index leverages storage to

increase the occurrence of higher flows

  • The North Yuba Index:

Available Water = Storage in NBB (9/30) + Inflow to NBB

920 820 693 Schedule 5 Schedule 6 500 Conference 1400 Schedule 4 1040 Schedule 3 Schedule 2 Schedule 1

slide-5
SLIDE 5

Lower Yuba River Accord

RMT Symposium, June 2013

5

Schedule North Yuba Index Percent Occurrence Cumulative 1 >1,400 56% 56% 2 1,400 to 1,040 22% 78% 3 1,040 to 920 7% 85% 4 920 to 820 5% 90% 5 820 to 693 5% 95% 6 693 to 500 4% 99% Conference < 500 1% 100%

Yuba Accord Flow Schedule Occurrence

  • Development of Accord Flows:
  • Optimum flow schedules, plus
  • Accurate index for flow schedule dispatch, plus
  • High occurrence of schedules 1 & 2
slide-6
SLIDE 6

Lower Yuba River Accord

RMT Symposium, June 2013

6

Expected Occurrence Frequency of Accord Flow Schedules

slide-7
SLIDE 7

Lower Yuba River Accord

RMT Symposium, June 2013

7

Ranked North Yuba Index (Accord EIR model)

In the Drier Years (low inflow) Storage plays an increasing role in determining flow schedule In the Driest 15% of years the Accord Flow Volume is about equal to the total NBB Inflow (modeled)

Start of Water Year NBB Active Storage Annual NBB Inflow

slide-8
SLIDE 8

Lower Yuba River Accord

RMT Symposium, June 2013

8

Comparison of Year Types and Flow Schedule

North Yuba Index (Yuba Accord) Yuba River Index (D1644) Sacramento Valley Index 2006 NA (1) Wet Wet 2007 2 Dry Dry 2008 3 Critical Critical 2009 2 Below Normal Dry 2010 2 Below Normal Below Normal 2011 1 Wet Wet 2012 2 Below Normal Below Normal

slide-9
SLIDE 9

Lower Yuba River Accord

RMT Symposium, June 2013

9

Accord Water Temperature Performance

  • Accord flows designed to achieve various temperature
  • bjectives
  • No assigned temperature criteria
  • Extensive modeling in 2005-2007 predicted good results
  • Empirical water temperature data 2007 – 2012
  • Actual Mean Daily temperatures have generally been in the

ranges expected

  • Summertime temperatures at Marysville have been at or below the

expected ranges

slide-10
SLIDE 10

Lower Yuba River Accord

RMT Symposium, June 2013

10

Actual Temps in River Colder than Predicted by Modeling – 2007 (Dry)

slide-11
SLIDE 11

Lower Yuba River Accord

RMT Symposium, June 2013

11

Actual Temps in River Colder than Predicted by Modeling – 2008 (Critical)

slide-12
SLIDE 12

Lower Yuba River Accord

RMT Symposium, June 2013

12

Actual Temps in River Colder than Predicted by Modeling – 2009 (Dry)

slide-13
SLIDE 13

Lower Yuba River Accord

RMT Symposium, June 2013

13

2007 – Schedule 2 (Dry Year)

slide-14
SLIDE 14

Lower Yuba River Accord

RMT Symposium, June 2013

14

2008 – Schedule 3 (Critical Year)

slide-15
SLIDE 15

Lower Yuba River Accord

RMT Symposium, June 2013

15

2009 Schedule 2 (Below Normal Year)

slide-16
SLIDE 16

Lower Yuba River Accord

RMT Symposium, June 2013

16

2010 Schedule 2 (Below Normal Year)

slide-17
SLIDE 17

Lower Yuba River Accord

RMT Symposium, June 2013

17

2011 Schedule 1 (Wet Year)

slide-18
SLIDE 18

Lower Yuba River Accord

RMT Symposium, June 2013

18

2012 Schedule 2 (Below Normal Year)

slide-19
SLIDE 19

Lower Yuba River Accord

RMT Symposium, June 2013

19

Summary

  • Flows
  • Perform as intended
  • With the North Yuba Index, less impact (more water) in drier year

types

  • Temperatures
  • Performance generally better than modeled (colder temps) during

warm summer months

  • Implementation of Yuba Accord Operations
  • Successful implementation - no violations of Fisheries Agreement
  • No trigger of penalties or dispute provisions
slide-20
SLIDE 20

Lower Yuba River Accord

June 12, 2013 Yuba Accord River Management Team 5th Annual Symposium Accord Flow and Temperature Performance