USGS Surface-Water Monitoring Activities in Louisiana · •Deck elevation 30.0 ft NAVD 88...
Transcript of USGS Surface-Water Monitoring Activities in Louisiana · •Deck elevation 30.0 ft NAVD 88...
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USGS Surface-Water Monitoring
Activities in Louisiana
Presented to the Louisiana Water Resources Commission
by John K. Lovelace, September 27, 2017
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Local, State, and Federal
Partner Agencies
Sabine River Compact
Commission
Bayou Lafourche
Fresh Water District
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Data Network—Streams, Lakes,
Reservoirs, and Coastal Areas
Surface Water
24 Index-Velocity sites
53 Stage-Discharge sites
123 Continuous Stage sites
131 Crest-Stage sites
7 Flood-Profile sites
Water Quality
40 Continuous Monitor Sites
4 NASQAN Sites
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Traditional gage
construction with stilling
well and submersible
pressure transducer.
In addition to stage and
discharge, many sites also
measure rainfall, wind
speed, and wind direction.
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Power supply,
data recorder,
and transmission
equipment. Many
of these gages
are “real-time”
and data are
typically
transmitted to
the internet
hourly via GOES
satellite.
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Newer gages
use non-contact
radar sensors to
measure the
water level.
These gages
can be better
located to
capture the full
range of stage
because no in-
channel
structure is
required.
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Typical
coastal
installation
on channel
marker
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Coastal Monitoring Network
07381349 Caillou Lake SW of
Dulac Louisiana
• 40 Continuous monitoring stations • 25 Traditional stations
• LWF Shrimp/Oyster season
• DNR Diversion operation
• 10 CRMS stations
• Marsh health
• 5 Hurricane hardened stations
• Hurricane monitoring
• Typical Parameters
• Temperature
• Specific Conductance
• Computed Salinity
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Hurricane Hardened Stations • Hurricane Katrina
supplemental funds
• 10 Stations
• 5 Louisiana
• 5 Mississippi
• Construction
• Contracted with New
Orleans COE
• 90’ Steel pipe
• 10’x10’ Deck
• Deck elevation 30.0 ft
NAVD 88
• Installed summer 2008
• Data collection
• Water level
• Water temperature
• Specific conductance
• Wind speed/direction
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07381349 Caillou Lake SW of Dulac, LA
Hurricane Gustav September 1, 2008
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Peak-stage gage—
Small pieces of cork
float up and mark the
high water on a wood
staff mounted inside a
pipe, the lower end of
which is in the stream.
Four to six peaks per
year are typically
recorded. All
continuous gages
have an associated
peak gage to verify the
maximum water level
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Continuous nitrate
monitors at:
Mississippi River at
Baton Rouge
Atchafalaya River at
Morgan City
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Mississippi River Nitrate and Turbidity
• Continuous Monitoring
• Gage height, discharge, nitrate, pH, salinity, specific conductance, dissolved oxygen, and turbidity from direct or proxy measurements
• Intervals of seconds to hours
• Remote access and control of sensors
Mississippi River at Baton Rouge
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Mississippi River @ Baton Rouge: 1,150,000 mi2 drainage area, ~26% of
conterminous US total streamflow to the ocean, ~ 43% of total N load
Historical data from NWIS (Mississippi River @ Baton Rouge, 07374000)
1/07 5/07 9/07 1/08 5/08 9/08 1/09 5/09 9/09 1/10 5/10 9/10 1/11 5/11 9/11 1/12 5/12 9/12 1/13 5/13 9/13
Dis
ch
arg
e (
CF
S)
0
200000
400000
600000
800000
1000000
1200000
1400000
1600000
Nit
rate
(m
g N
/L)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Discharge
Nitrate
NAWQA sensor record
Continuous Nitrate
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Continuous Turbidity
Nov 11 Jan 12 Mar 12 May 12 Jul 12 Sep 12 Nov 12 Jan 13 Mar 13 May 13 Jul 13 Sep 13 Nov 13
Dis
ch
arg
e (
CF
S)
0
200000
400000
600000
800000
1000000
1200000
Tu
rbid
ity (
FN
U)
0
100
200
300
400
500
600
Discharge
Turbidity (DTS-12)
• 2 Locations along the Mississippi River • Baton Rouge • Belle Chasse
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NASQAN
• 4 Stations sampled 14 or 16 times/year
• Mississippi River
• St. Francisville (16 samples/year)
• Belle Chasse
• Atchafalaya River
• Melville (16 samples/year)
• Morgan City
• Discharge
• 2 continuous record stations
(index velocity)
• Sediment
• Water Quality (parts per billion
protocol)
• Metals
• Nutrients
• Organics
• Pesticides
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What the data are used for:
Highway and bridge construction
Flood monitoring, management, and mitigation
Coastal restoration projects
Water availability
Ecological studies
Fisheries management
Wastewater management
Contaminant transport studies
Navigation
Recreation
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Flood
conditions
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Streamflow
conditions
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Drought
conditions
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The USGS WaterNow smartphone app can
be programmed to provide alerts when
streamflow conditions reach user-defined
thresholds at gages of interest