SUBJECT HEADING LIST TO THE CEDB 

You can browse this alphabetical list of Subject headings or
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 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

BT = Broader term; NT = Narrower term; RT = Related term; SN = Scope note; UF = Use for
Unauthorized term = Term displayed in []'s

O

Observation wells
            BT: Wells
Occupational health
            RT: Health hazards
            RT: Public health
Occupational safety
            BT: Safety
Ocean bottom
            RT: Sea floor
Ocean engineering
            BT: Engineering
Ocean water
            BT: Water
Ocean waves
            BT: Waves
Oceanography
            BT: Graphic methods
Oceans
            NT: Baltic Sea
            NT: Bering Sea
            NT: Black Sea
            NT: Caspian Sea
            NT: Mediterranean Sea
            NT: North Sea
Odors
Offshore construction
            BT: Construction
Offshore drilling
            BT: Drilling
Offshore pipelines
            BT: Pipelines
            RT: Submarine pipelines
            RT: Underwater pipelines
Offshore structures
            BT: Structures
Ohio
            BT: United States
Ohio River
            BT: Rivers
Oil pipelines
            BT: Pipelines
Oil shale
            BT: Shale
Oil spills
            BT: Spills
Oil storage
            BT: Storage
Oils
            NT: Crude oil
Oklahoma
            BT: United States
Oman
            BT: Asia
One dimensional flow
            BT: Flow
Open channel flow
            BT: Flow
Open channels
            BT: Channels
Openings
Operation
            NT: Biological operations
            NT: Cold weather operations
            NT: Reservoir operation
Optical devices
Optimization
            RT: Algorithms
Optimization models
            BT: Models
Orbits
            RT: Space exploration
Oregon
            BT: United States
Organic carbon
            BT: Carbon
            NT: Dissolved organic carbon
Organic chemicals
            BT: Chemicals
            NT: Volatile organic chemicals
Organic compounds
            NT: Halogen organic compounds
Organic loads
            BT: Loads
Organic matter
            RT: Microbes
Organic nitrates
            BT: Nitrates
Organizational policy
            BT: Policies
Organizations
            NT: Corporations
Orthotropism
Oscillations
Oscillatory flow
            BT: Flow
Osmosis
            NT: Electroosmosis
Outfall sewers
            BT: Sewers
Outflow
            BT: Flow
Outwash
            UF: [Overwash]
Overconsolidated soils
            BT: Soil consolidation
Overflow
            BT: Flow
            NT: Combined sewer overflow
Overland flow
            BT: Flow
            UF: [Surface flow]
Overloads
            BT: Loads
Overpasses
            BT: Highways and roads
[Overwash]
            Use: Outwash
Owners
Oxidation
Oxygen
            NT: Dissolved oxygen
Oxygen content
Oxygen demand
            NT: Biochemical oxygen demand
            NT: Chemical oxygen demand
Oxygen transfer
Oxygenation
            RT: Deoxygenation
Ozone
Ozonization

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