Lahontan Basin Area Office Water Supply Outlook March 2019 - - PowerPoint PPT Presentation

▶
lahontan basin area office water supply outlook
SMART_READER_LITE
LIVE PREVIEW

Lahontan Basin Area Office Water Supply Outlook March 2019 - - PowerPoint PPT Presentation

Nov 24, 2022 244 likes •525 views

Lahontan Basin Area Office Water Supply Outlook March 2019 Presented by: Dan Lahde Topics Newlands Project Credit Water Water Year 2019 Outlook NRCS/RFC Forecasted Data Current/Projected Reservoir Operations 2 Truckee and

slide-1
SLIDE 1

Lahontan Basin Area Office Water Supply Outlook

March 2019

Presented by: Dan Lahde

slide-2
SLIDE 2

Topics

  • Newlands Project Credit Water
  • Water Year 2019 Outlook
  • NRCS/RFC Forecasted Data
  • Current/Projected Reservoir Operations

2

slide-3
SLIDE 3

LAKE TAHOE DONNER INDEPENDENCE PROSSER Tahoe City MARTIS Nixon Fernley Derby Dam WINNEMUCCA LAKE (dry) STAMPEDE TRUCKEE RIVER CARSON LAKE CARSON RIVER Pyramid Lake Indian Reservation Stillwater NWR LAHONTAN BOCA Reno/Sparks Newlands Project Carson City Fallon Fallon Indian Reservation PYRAMID LAKE MARBLE BLUFF TRUCKEE CANAL

Truckee and Carson River Basins and the Newlands Project

3

slide-4
SLIDE 4

Newlands Project Credit Water (NPCW)

  • NPCW establishment is provided for by the Truckee River

Operating Agreement (TROA) (TROA §7.H)

  • Goal of NPCW under TROA: “…make maximum use of Carson

River water for the Newlands Project and to minimize diversions of Truckee River water through the Truckee Canal…” (TROA §7.H)

  • “NPCW established pursuant to TROA 7.H.1 shall be managed by

the United States…”

4

slide-5
SLIDE 5

NPCW Establishment

NPCW Can be Established by:

  • Exchange volume that would have been diverted at Derby with an

equal amount of Fish Credit Water (§7.H.2(a))

  • Floriston Rate Holdback - Retaining in storage an amount of

Floriston Rate Water (§7.H.2(b)(1))

  • Above Floriston Rate Holdback - Retaining in storage Truckee

River flow in excess of Floriston Rates (§7.H.2(b)(2))

5

slide-6
SLIDE 6

NPCW Management

6

slide-7
SLIDE 7

2018-2019 NPCW Operations

7

slide-8
SLIDE 8

WY 2019 Outlook

8

slide-9
SLIDE 9

Current WY Precipitation To Date

9

slide-10
SLIDE 10

Current Snowpack

10

slide-11
SLIDE 11

Historical & Forecasted Apr-Jul Runoff by Basin

RFC Mar 10 Forecast

11

slide-12
SLIDE 12

Historical & Forecasted A-J Runoff - Truckee

RFC Mar 10 Forecast

12

slide-13
SLIDE 13

Historical & Forecasted A-J Runoff - Carson

RFC Mar 10 Forecast

13

slide-14
SLIDE 14

WY 2019 Mar 10 RFC Forecast - Hydrograph

Farad AJ Vol (KAF) Carson AJ Vol (KAF) Tahoe Gate Closed Rise (ft.) 30% (W) 563 330 2.6 50% (M)

487 275 2.1

70% (D) 389 196 1.6

14

slide-15
SLIDE 15

Average & Forecasted Farad Flow

15

slide-16
SLIDE 16

Forecasted Lahontan Inflows

  • Ft. Churchill Inflows = 618 cfs

Lahontan Reservoir = 194,6100 AF

16

slide-17
SLIDE 17

Average & Forecasted Ft. Churchill Flow

17

slide-18
SLIDE 18

18

Current Reservoir Storage

slide-19
SLIDE 19

Stampede Reservoir Storage Forecast

19

slide-20
SLIDE 20

Lake Tahoe Storage Forecast

20

slide-21
SLIDE 21

Lahontan Reservoir Storage Forecast

21

slide-22
SLIDE 22

Boca Reservoir Storage Forecast

22

slide-23
SLIDE 23

Lahontan Reservoir Storage Forecast - MRM

23

47 out of 59 Traces (79%) store on the boards 20 of 59 Traces (33%) stores to the top of the boards

slide-24
SLIDE 24

Lahontan Forecasted Total Outflow (cfs) - MRM

24

26 of 59 (43%) Traces Require Precautionary Drawdown

slide-25
SLIDE 25

Current Lahontan Operations

  • The 30% and 50% RFC forecast exceedance runs show Lahontan

Reservoir storing on the flashboards in 2019.

  • MRM Riverware run forecasts that 33% of traces will fill Lahontan and

43% of traces show a precautionary drawdown.

  • Based on the forecast, no additional NPCW will be established or

released in 2019.

25

CKM6

slide-26
SLIDE 26

Slide 25 CKM6 Need to edit

Clancey, Katherine Marie, 3/8/2019

slide-27
SLIDE 27

End!

Comments or Questions?

End!

Comments or Questions?

26