Monitoring Results 2

Selected and Preliminary Re

TWG Meeting May 17, 20
Outflow

1-Oct 15-Oct 29-Oct 12-Nov 26-Nov 10-Dec 24-Dec 7-Jan 21-Jan 4-Feb 18-Feb 4-Mar 18-Mar 1-Apr 15-Apr 29-Apr 13-May 27-May 10-Jun 24-Ju

0

5,000

10,00015,00020,00025,00030,00035,00040,00045,00050,000

Discharge(cfs)

'01 Inflow
975

100010251050107511001125

D epth inElevation(m)

Conductivity (μS/cm)

1991 1992 1993 1994 1995 1996 1997 1998 1

penstock depth

jet-tube depth
Colorado River Mainstem Daily Tem

TEMPERATURE C

68

10121416182022

10/1/99

10/31/99

11/30/99

12/30/99

1/29/00

2/28/00

3/29/00

4/28/00

5/28/00

Glen Canyon Dam (-15 RM)

Diamond Creek Gage (224 RM)

DATE

TEMPERATURE C

68

10121416182022

10/1/00

10/31/00

11/30/00

12/30/00

1/29/01

2/28/01

3/30/01

4/29/01

5/29/01
PHYTOBENTHIC BIOMASS

Colorado River, Glen and Grand Canyo

05

101520253035

1991 1992 1993 1994 1995 1996 1997 1998 1

Mean AFDM - g / m 2

O

s

cillatoria

MAMB

Cladophor

a

0

1000200030004000500060007000

1991 1992 1993 1994 1995 1996 1997 1998 

YE

AR

Mean Density - # / m 2 SNAIL

S

IN

V

E

RTS
0

10203040506070

0.8

3.1 98.62 109.61 

AFDM - g / m2

0

2000400060008000

100001200014000

0.

8

3.1 98.62 109.61 

SA

MP

L

I

NG SI

TE

S

Density - # / m2
0

10203040506070

1991 1992 1993 1994 1995 1996 1997 1998 

PSD

Proportional Stock Density for RBT at Lees Fe
Mean Catch per minute and 95% Confidence, Interval Lees Ferry Elec

March 2002 (Coffelt Boat only).

0.01.02.03.04.05.06.0

1991 1992 1993 1994 1995 1996 1997 1998 19

Year
Angler Catch Rates at Le
0

123456

1991 1992 1993 1994 1995 1996 1997 1998 

Year

Catch per Minute

Electrofishing CPUE for RBT at Lees Ferry
LITTLE COLORADO RIVER INFLOW

RBT CPUE (# fish / 10 hr)

0

200400600800

10001200140016001800

Rainbow Trout

Brown Trout

BRIGHT ANGEL CREEK

 RBT CPUE (# fish / 10 hr)

0

200400600800

10001200140016001800

Dec-1983

Dec-1985

Dec-1987

Dec-1989

Dec-1991

Dec-1993

Dec-1995

Dec-1997

Dec-1999

Rainbow Trout

Brown Trout

CPUE from electrofishing for BT and RBT in Dece
0%

10%20%30%40%50%60%70%80%90%

100%

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

Proportions of Native and Non-Native fishes in LC
Bird Abundance per Patch

05

1015

New High Water

Old High Water

Marble Canyon Grand Canyon

Bird Richness per Plot

012345

Marble Canyon 

abundance Spec

Bird Species
Southwestern Willow Flycatchers

Confirmed Nests

YEAR

NESTS

02468

1012

1984 1986 1988 1990 1992 1994 1996 
Mamm

al Abundance per Transect

05

101520

Water's Edge

New High Water

Old High Water

Marble Canyon Grand Canyon

Mammal Richness per Transect

01234

Marble Canyon 

number Nu

Small Mammals
Herp Richness per Transect

01234

Water's Edge

New High Water

Old High Water

Marble Canyon Grand Canyon

Mean Herps per Transect

05

1015 Water's Edge

New High Water

Old High Water

Marble Canyon 

Species richness

Herptofauna-snakes, lizards, toads, etc
Arthropod Abundance 

per Transect

10

100

1000

Water's Edge

New HighWater

Old High Water

Marble Canyon Grand Canyon

Arthropod Richness per Transect

048

1216

Water's Edge

New HighWater

Old HighWater

Marble Canyon 

number Num

Arthropods
TVV per Tra

nsect

0

50

100150

Water's Edge

New High Water

Old High Water

Marble Canyon Grand Canyon

Plant Richness per Transect

01234

Marble Canyon 

Vegetation volume Numbe

Terrestrial Vegetat
Updated HBC Recruitm

Superta

g E

stim

ate

s of A

g

e-1 R

ecruitm

e

nt by Bro

0

10000200003000040000500006000070000

1988 1989 1990 1991 1992 1993 1994 1995 

Brood Year

Abundance
Abundance of HBC >150 mm

0

100020003000400050006000700080009000

1990 1991 1992 1993 1994 1995 1996 1997 1

Year

Abundance Supertag 00

Supertag 01Douglas and Marsh Mth (1995)Douglas and Marsh Null (1995)USFWS 2001Fit USFWSRoAverage 92-97Average 89-91

provisional
Projection of HBC Abundance by Age Class

0

100020003000400050006000700080009000

19931994199519961997199819992000200120022003200420052006200720082009

Year

Abundance
0

500

10001500200025003000

1990 1991 1992 1993 1994 1995 1996 19

RECRUITMENT TO 15Om

Flannelmouth Sucker Recruitment-20