MMWD Fish Tales - nbwatershed.org · 5/5/2017 · 0 100 200 300 400 500 600 700 800 900 1000 1100...
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MMWD Fish Tales North Bay Watershed Association Board Meeting – May 5, 2017
Transcript of MMWD Fish Tales - nbwatershed.org · 5/5/2017 · 0 100 200 300 400 500 600 700 800 900 1000 1100...
MMWD Fish TalesNorth Bay Watershed Association Board Meeting – May 5, 2017
San Rafael Creek King Salmon
Home to the largest and most stable population ofcoho salmon in Central California
Lagunitas Creek & Coho Salmon
Mouth of Creek is Open Year-Round – No Sand Bar
Estuary Access & Habitat
MMWD Water Supply
25%
73%
2%
Imported
District Reservoirs
Recycled
Human Impacts - Habitat Loss
50% of watershed cut off by MMWD
dams.
Blocking access to streams with:
Rearing habitat Lower winter
flows for eggs and fry
Cooler water Better
spawning gravel
Flows for FishMore water for Lagunitas Creek – Since 1995
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
Min
imum
Mon
thly
Stre
am Fl
ow (c
fs)
State Water BoardOrder WR95-17
Coho Salmon
People
• Residential, businesses, and irrigation
Environment• Water is released to protect the
largest Coho run in Central California 66%
34%
People Environment
Annual Avg. Water Use = 33,000 AF/year
Water for People and the Environment
22,000 AF
11,000 AF
MMWD has invested $17M in fisheries enhancement since 1997
Marin Watersheds
In West Marin, there are four species of salmon & trout:
Coho
Steelhead/Rainbow
Chum
Chinook
In East Marin, there are two salmonid species:
Steelhead/Rainbow
Chinook
Salmon & Steelhead Life Cycle
Our surveys track all freshwater life stages
Salmon Spawner Surveys
•Finding fish and redds (nests)
Salmon Spawner Surveys
Adult Coho Returns
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
Coh
o Re
dds
Olema Creek
Cheda and Nicasio Creeks
Devil's Gulch
San Geronimo Tributaries
San Geronimo Creek
Lagunitas Creek
Mean
NOAA Recovery Target
Note: The NOAA recovery target is 2,600 adults or 1,300 redds assuming two fish per redd.
Dynamic Weather Patterns
52
11
95
0
10
20
30
40
50
60
70
80
90
100
Average 2013 July '16 - April 19, 2017
Lake Lagunitas Annual Rainfall (inches)
Lowest calendar year rainfall
Highest water year rainfall
Surviving Environmental Extremes
Fall 2014 Fall 2015
Extreme Flooding & Habitat Impacts
Smolt Surveys
Rotary Screw Trap
Prediction for the 2017 Smolt Population
R² = 0.85
-
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
20,000
0 2 4 6 8 10 12 14
Coh
o sm
olts
Days of Stream Flows between 650 and 1,100 cfs, at the Point Reyes Gage
2017
Things May Not be What They Seem
Prediction for the 2017 Smolt Population
R² = 0.85
-
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
20,000
0 2 4 6 8 10 12 14
Coh
o sm
olts
Days of Stream Flows between 650 and 1,100 cfs, at the Point Reyes Gage
2017
Habitat Enhancement Efforts
Biotechnical Bank Stabilization & Revegetation
Before
After
Habitat Enhancement Efforts
Large woody debris structures (LWD)
High Flow Refuge from LWD
Habitat Enhancement Efforts
Fish passage improvements
Habitat Enhancement EffortsEstuary Restoration – Giacomini Wetlands
Before After
Estuary Restoration - Giacomini Wetlands
Habitat Enhancement Efforts
Winter Habitat & Floodplain Enhancement
Habitat Enhancement Efforts
Winter Habitat & Floodplain
Enhancement
Habitat Enhancement Efforts
