ITEM: |
INFORMATIONAL ITEMS/STAFF REPORTS |
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25. |
CARMEL RIVER FISHERY REPORT FOR JULY 2023 |
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Meeting Date: |
August 21, 2023 |
Budgeted: |
N/A |
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From: |
David J. Stoldt, |
Program/ |
N/A |
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General Manager |
Line Item No.: |
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Prepared By: |
Beverly Chaney |
Cost Estimate: |
N/A |
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General Counsel Review: N/A |
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Committee Recommendation: N/A |
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CEQA Compliance: This
action does not constitute a project as defined by the California
Environmental Quality Act Guidelines Section 15378. |
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AQUATIC HABITAT AND FLOW CONDITIONS: River flow throughout much of the watershed
remained above normal in July with a flow of 13 cubic-feet-per-second (CFS) all
the way to the lagoon. At Los Padres Dam, the syphon was turned on and the Behavioral
Guidance System (BGS) was closed mid-month, while the reservoir was barely
spilling by the end of the month. Juvenile steelhead rearing conditions remain
“good” in the mainstem while most tributaries began to dry back.
July’s mean daily streamflow at the Sleepy
Hollow Weir gaging station dropped from 38 to 15
cfs (monthly mean 25 cfs), resulting in 1,530 acre-feet (AF) of
runoff, while flows at the Highway 1 gage dropped from 46 to 13 cfs (monthly
mean 24 cfs), resulting in 1,450 acre-feet (AF).
There was no rainfall in July as recorded at the San Clemente
gauge. The rainfall total for Water Year (WY) 2023 (which started October 1,
2022) is 35.19 inches, or 168% of the long-term
year-to-date average of 21.02 inches.
CARMEL RIVER
LAGOON: The lagoon water surface elevation (WSE) ranged
from approximately 4.0 to 8.1 feet in July. The lagoon mouth closed, likely for
the season, on July 16th (North American
Vertical Datum of 1988; NAVD 88) (See graph below).
Water
quality depth-profiles were conducted at five sites on July 19, 2023, while the
lagoon mouth was closed to the north, water surface elevation was 7.3 feet, and
river inflow was 19 cfs. Steelhead rearing conditions were fair. Salinity
levels were low down to 1-meter (<5 ppt), but much higher at depth, water
temperatures ranged from 64-70 degrees Fahrenheit in the mainstem, but up to 80
degrees in the upper south arm, and dissolved oxygen (DO) levels were variable,
ranging from 5-15 mg/l.
JUVENILE
STEELHEAD RESCUES – TRIBUTARIES: Staff started juvenile steelhead rescues in
the tributaries on June 30, 2023, as the lower portions of the creeks started
to dry. By the end of July, a total of 3,152 fish were rescued and released
into the Carmel River including: 2,778
from Cachagua Creek, 216 from Hitchcock Creek and 163 from Garza Creek There were
5 mortalities, and 102 fish were tagged before release.
Carmel River Lagoon Plot:
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