2012 Hydrograph Development

Status

June 22, 2011

1
2012 Hydrograph

Development 

• Start with 2011 Hydrograph 

(+/-100 kaf w/16,000 & 22,000 cfs limits)

• Consider operating experiences from 2011

• Look to improve cost/benefit/flexibility 

• Within existing environmental compliance

2
Methods

• USGS Model for sand

• Western’s GTMAX hourly model for costs to 

the Basin Fund

• Compare against original MLFF

• Average sediment inputs

• Objective – Retain sand inputs high in the 

system in anticipation of a potential HFE

3
4

0

20

40

60

80

100

120

140

160

Sand Load (kg/sec)

Average Sand Inputs
5

0

200

400

600

800

1000

1200

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

Releases (KAF)

Bounding the Options

Monthly Release Volumes for 9.3 maf year

With November 2011 HFE

Steady +/- 25 KAF +/- 50 KAF +/- 100 KAF Original MLFF Pre-ROD Targeted
-400

-300

-200

-100

0

100

200

300

400

500

600

700

800

900

1000

Bedload Sand (ktons)

Bounding the Options

Upper Marble Canyon (RM30)

9.3 maf Release

MLFF +/-100 Targeted (Aug) Steady/Steady Pre-ROD

Nov 1 Cost

Steady 820 ktons $2.66m

+/-25 732 ktons $2.63m

+/-50 719 ktons $2.36m

Targeted 694 ktons $1.34m

+/-100 694 ktons $1.75m

MLFF 572 ktons reference

Pre-ROD 453 ktons -$2.78m
Finalists

2011 Hydrograph Method

• Monthly volume may vary 

+/- 100 kaf from average of 

remaining balance

• 16,000 cfs limit up to 11.0 

maf annual release

• 22,000 cfs limit above 11.0 

maf annual release

• No limits if needed for 

equalization

• ROD limits apply

Targeted Method

• August releases are limited 

using percentage method to 

conserve sediment inputs

• Sept/Oct low-steady 

releases also conserve 

sediment

• No limits on other months

• No limits if needed for 

equalization

• ROD limits apply

7
2012 Finalists

9.3 maf Release Example

8

+/-100 KAF (SCENARIO 18) Targeted (SCENARIO 19)

Release

Annual 

Forecast

Sept Steady 

Flow Target

Min 

Monthly 

Release

(Avg - 100 kaf)

Max 

Monthly 

Release

(Avg + 100 kaf)

Release

Annual 

Forecast

Sept 

Steady 

Flow

Target

August

Target

Percent

August 

Target

Volume

(kaf) (maf) (kaf) (kaf) (kaf) (kaf) (maf) (kaf) (kaf) 

Oct 738 9.30 714 738 738 Oct 738 9.30 714 800

Nov 700 9.30 714 685 885 Nov 700 9.30 714 800

Dec 800 9.30 714 694 894 Dec 800 9.30 714 800

Jan 800 9.30 714 693 893 Jan 800 9.30 714 10 800

Feb 700 9.30 714 693 893 Feb 700 9.30 714 10 800

Mar 710 9.30 714 708 908 Mar 700 9.30 714 12 800

Apr 730 9.30 714 728 928 Apr 600 9.30 714 15 800

May 760 9.30 714 752 952 May 800 9.30 714 20 800

Jun 800 9.30 714 783 983 Jun 948 9.30 714 25 800

Jul 1,000 9.30 714 824 1,024 Jul 1,000 9.30 714 40 800

Aug 848 9.30 714 748 948 Aug 800 9.30 714 100 800

Sep 714 9.30 714 Sep 714 9.30 714
Monthly Release Volumes

9.3 maf Release

9

0

200

400

600

800

1000

1200

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

Release (kaf)

+/-100 Targeted
10

-400

-300

-200

-100

0

100

200

300

400

500

600

700

800

900

1000

Bedload Sand (ktons)

Upper Marble Canyon (RM30)

9.3 maf

+/-100 KAF August Target MLFF

Nov 1 Cost

+/-100 650 ktons $0.64m

Targeted 624 ktons $0.41m

MLFF 526 ktons Reference
Monthly Release Volumes

9.3 maf > 8.23 maf (2004) Pattern

11

0

100

200

300

400

500

600

700

800

900

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

Release (kaf)

+/-100 Targeted
12

-400

-300

-200

-100

0

100

200

300

400

500

600

700

800

900

1000

Bedload Sand (ktons)

Round 5b

Upper Marble Canyon (RM30)

9.3 maf > 8.23 maf

+/-100 KAF August Target MLFF

Nov 1 Cost

+/-100 920 ktons $1.03 m

Targeted 910 ktons $1.01 m

MLFF 867 ktons Reference
Monthly Release Volumes 

9.3 maf > 9.72 maf Release (July 2009)

13

0

200

400

600

800

1,000

1,200

1,400

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

Release (kaf)

+/-100 Targeted
14

-400

-300

-200

-100

0

100

200

300

400

500

600

700

800

900

1000

Bedload Sand (ktons)

Round 5c

Upper Marble Canyon (RM30)

9.3 maf > 9.7 maf

+/-100 KAF August Target MLFF

Nov 1 Cost

+/-100 501 ktons $1.89m

Targeted 454 ktons $1.47m

MLFF 369 ktons Reference
15

0

200

400

600

800

1,000

1,200

1,400

1,600

7 8 9 10 11 12 13

Retained Sand (ktons)

Annual Release (maf)

Projected Sand Retained (November)

Targeted