oil spills - experience from incidents and the need for improved coastal predictions hilde dolva
Post on 14-Jan-2016
31 Views
Preview:
DESCRIPTION
TRANSCRIPT
Oil spills - Experience from incidents and the need for
improved coastal predictions
Hilde DolvaSenior Adviser
NCA’s main tasksAuthority under the Ministry for Fisheries and Coastal Affairs.Main tasks:• Piloting and Vessel Traffic Services (VTS)• Navigational Aids• Construct, improve and maintain shipping lanes and fishing
harbours, transport-planning activities• Acute pollution – at sea and onshore
– Manage governmental oil spill response – primarily spills from vessels
– Co-ordinate the national contingency– Regulatory authority for industry and municipal oil spill response
operations
Norwegian Coastal Administration, Department for Emergency Response
Norway in a nutshell• Geographical features:
– North - South: 1752 km – Coastline: 80 000 km– Climatic variations form
arctic in the north to coastal in the south.
– EEZ approx 2 mill. km2
• Petroleum industry:– Production 3 mill. bbl./day– 90 % is exported, 3rd largest
exporting country– Exploration and production
starting in the Barents Sea.• Large shipping industry
– And Increasing traffic off the Norwegian coast
Some incidents in Norway….
Green Ålesund 2000
John R 2000
Rocknes 2004
Server 2007
Crete Cement 2008Full City 2009
Godafoss 2011
Norwegian Coastal Administration, Department for Emergency Response
…not only oil
National principles – counter pollution• Focus on preventive measures and risk reduction
– Risk based – not “worst case”• Coordination
– Private – Municipal - Governmental• Response
– As close to the source of the spill as possible to reduce further pollution and achieve the best net damage reduction
– Use of both mechanical measures and chemical dispersants • Continuous surveillance of response operations
Pollution incidents- focus on:
• Type of pollution
• Sensitive areas affected/might be affected
• Oil drift and spreading
Norwegian Coastal Administration, Department for Emergency Response
Info needed
• Wind
• Waves
• Currents
• Drift
• Ice
• Tides
When incidents happens
• Need data (weather forecast, oildrift) quickly, information needed to operational use (e.g.where to send oil recovery equipment)
• Information integrated in maps used
• The information - used in the planning for the next step
Where is the oil…
Predictions oildrift Godafoss
Local knowledge
Foto: Svein Dahlgren regiongeolog
Beach cleaning- time consuming- expensiveCan it be avoided?
Godafoss incident, 17 February 2011
Norwegian Coastal Administration, Department for Emergency Response
www.kystverket.no- public information
Full City – registrert og modellert strandpåslag
Oil in ice, estimated 1.2 l oil pr 1000 m2
Ice Information must be: - detailed (grid)- updated
Oil weathering
Incident Godafoss 2011Estimated oil spill112 m3
Norwegian Coastal Administration, Department for Emergency Response
Norwegian Coastal Administration, Department for Emergency Response
Oil recovery budget– Full City
Total on board "Full City" 1154 m3
From open sea 28 m3
From beaches 74 m3
Emergency pumping from ship 860
m3
Left in nature 191 m3
Tømt Götavärket ?
Tømt Langesund
In total 2930 tons is collected (963 tons of oil)
Oil samples
• Sampling: – Thin oil– Thick oil– Oil on beaches– Birds
• Oil identificationWhat is the source/ securing evidence
Sampling
Spills from: vessels, illegal oil discharge, satellite observationsThe oils have different fingerprints Extent of damage
min4 6 8 10 12 14 16 18
counts
0
50000
100000
150000
200000
250000
300000
350000
400000
FID1 A, (220204\004F0401.D)
Pad prøve av oljefilm på sjø
Figurer: SINTEF
Chemical dispersion - using vessel, helicopter and/or air plane
Chemical dispersion
• Must reduce overall environmental impact• Protect seabirds and shoreline• Can harm marin organisms• If used- e.g. Deep Water Horizon – remaining oil?
Stril Poseidon, Draugen 2006
New technology
• Drift buoys – improved oil drift models
• Operation in the darkness - oil recovery
• Low temperatur/ice are limiting factors
Challenges• Weather and current forecasting - linked to oil
recovery possibilities• Near coast predictions – more accuracy• Currents• Ice• Transfer oil drift predictions (wms) to maps • NCA needs:
– oil drift predictions during incidents– historical data for contingency planning
Norwegian Coastal Administration, Department for Emergency Response
Norwegian Coastal Administration, Department for Emergency Response
Thank you for your attention!
Thank you for your attention!
“working to keep our coast and waters among the safest and purest in the world”
top related