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INDEPENDENT ACOUSTIC MONITORING PIPELINES CONSTRUCTION 2006 INDEPENDENT ACOUSTIC MONITORING PIPELINES CONSTRUCTION 2006 Supported by IFAW Supported by IFAW Grant Grant Alexander Vedenev Alexander Vedenev \ \ P.P. Shirshov Institute of Oceanology, RAS P.P. Shirshov Institute of Oceanology, RAS \ \
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PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

Mar 10, 2018

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Page 1: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

INDEPENDENT ACOUSTIC MONITORING PIPELINES CONSTRUCTION 2006INDEPENDENT ACOUSTIC MONITORING PIPELINES CONSTRUCTION 2006Supported by IFAW Supported by IFAW Grant Grant

Alexander Vedenev Alexander Vedenev \\ P.P. Shirshov Institute of Oceanology, RAS P.P. Shirshov Institute of Oceanology, RAS \\

Page 2: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

Long Term Acoustic autonomous Bottom Buoys(Two Buoys were used in 2006)

Acoustic autonomous Buoys with radio and Satellite Telemetry (Four this buoys were used in 2006 )

PPSIO instruments for monitoring

Page 3: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

Deployments of Acoustic autonomous Buoys with radio and Satellite Telemetry

1- bottom buoy with power sapply battery.2- surface buoy with radio and satellite

antennas on his mast.3- "pyramid" with a hydrophon.4- an intermediate anchor.5- float.6- float with reflector.

Page 4: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

Satellite buoys in Ships Laboratoryand on board Sailing Ship “NADEZHDA

July 2006

Page 5: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

Comparison real time monitoring instruments

PPSIO (IFAW) POI (SEIC)

Buoys can at bottom:- All data digitally recorded at bottom,- Computed levels of noise and spectra digitally transmitted by satellite connection to Internet;- Small digital data flow is 1 Kb eaсh 3 min- Data dynamic range more than 70 dB- Reserved radio system can transmit the same data by radio channel at 433 MHz also;- No limitation with data receiving -any place in world connected to Internet;- Satellite bottom buoy can transmit own coordinates by using own GPS receiver

Buoys can:- All data digitally recorded at bottom;- Row data transmit from buoys by FM radio chanal in analog form;- Huge data flow is 1Mb eaсh 3 min;- Data dynamic range about 30 dB;- Limitation for monitoring regionby 20 km around Piltun lighthouse -due to both atmospheric noise and limited altitude of lighthouse..

Page 6: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

JUNE 2006

Page 7: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

Start Finish Spread Type Activity Key Vessels Auxiliary

21-jul 2-aug Pipelay for deepwater Pipelay PA-A to KP 40 Semac 2x AHT at 100 %Semac PA-A Survey Vessel Survey PA-B to KP 40 Allied CommanderP Pipelay Pipelay for Shallow Water Pipelay PA-B KP 70- KP 66 Castoro 10 1x AHT at 100 %

Diving Support Vessel PA-B FPD, Flanges, etc. Fu LaiDredging: THSD 1 Standby Gerardus MercatorDredging: THSD 2 Backfill KP 65 – 60 TaccolaDredging: CSD Backfill Shore Approaches JFJ de Null + Pompeii

Page 8: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

The MAP OF ACOUSTIC MONITORING 2006 points Red: PPSIO-IFAW acoustic buoys Blue: POI-SEIC acoustic buoys

Page 9: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

First page of Website http://sns.academ.net/ifaw/

Second page will appear after “clicking” knob withname (number) of some buoy. This data appear after clicking on knob”buoy 04”. Buoy “04” was working in point S12(Piltun region) at time: 9:22\21.07 - 13:20\ 22.07.

Page 10: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

This is the same data, but screen copyshow other limit for noise level if exposuretime is 1 hour

To see exposure noise level at 1 hour, we used “mouse click” on knob “1 hour “Red line on level picture shows – PermittedExposure Levels (PEL) -130 dB for time 1 hour

Action CriteriaAction CriteriaRecomendedRecomended IISGIISG

Hours Hours PEL(dBPEL(dB))

0.25 140 0.25 140 0.5 135 0.5 135

1 1301 1302 1252 12544 120120

Page 11: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

Picture shows data receved from buoy “04” in point S13 (PA-B region)Time: 22.07\20:04:31-23.07\20:32:30

Noise averaging is 30 min PEL - at duration 30 min is 135 dB – see red line

You can see noise from ships “Nadezhda”at moving from POIbuoy “PA-B 20”and noise from ships prof. Bogorov

Page 12: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

First 3 from 5 day and night monitoring in point S1(south region pipelaying)

First picture shows data receved from buoy “02” deployed in point S1At time: 08:08\24.07 - 18:10\25.07

Second picture shows data received from buoy “03” deployed in the same point S1At time: 14:33\25.07 - 14:33\27.07

Page 13: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

Data from monitoring in point S2 (south region pipelaying)

First picture - buoy “04” in point S2 Time: 11:00\24.07 - 08:06\26.07

Second picture - buoy “04” in point S2Time 08:00\26.07 - 17:09\26.07

Third picture - buoy “02” in point S2Time 12:47\27.07 - 12:47\29.07

Page 14: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

At time 00:50\28.07 - 04:50\28.07 and exactly after24 hours 00: 50 \29.07 - 04:50\29.07.Levels exceed PEL 120 dBBut view of spectrogramm shows – this is not industrial noise, this is consequences of strong night currents passing near hydrophon

Page 15: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

Resulting noise level at 0.5 hour averaging from different satellite bottom buoysworking synchronously in points S1 and S2 in South Region during backfilling and pipelaying construction at time 24.07 – 29.07 2006

Page 16: PowerPoint - International Union for Conservation of ...cmsdata.iucn.org/downloads/ifaw_acoustic_monitoring.pdf · Bottom Buoys (Two Buoys were used in 2006) Acoustic autonomous Buoys

Noise Dose approach suppose to check PEL dB - Permitted Exposure Levels (RMS of sound pressure averaged on time duration of T) that suppose equal acoustic impact.

PEL(dB) = 130 - Q/3 *10 log10 (T / 60),

Where T is given in minutes, Q-dB exchange rate

PPSIO used Q=5 - precautionary approach

JASCO used Q=3 - equal-energy rule as “internal SEIC escalation guidance tool”

Hours PEL(dB) Hours PEL(dB) Q=5 (PPSIO) Q=3 (JASCO)Q=5 (PPSIO) Q=3 (JASCO)

0.25 140 1360.25 140 1360.5 135 1330.5 135 1331 130 1301 130 1302 125 127 2 125 127 44 120 124 120 124 8 8 -- 121 121

10 10 -- 120120

SEIC ignore IISG recommendationsSEIC ignore IISG recommendations