The nation's biological communities, habitats, ecosystems, and processes, and the ecological services, uses, and values they provide to this and future generations.
- Browse Related Terms: [Marine] Natural Heritage, Cultural Heritage, Cultural patrimony, Cultural Resource, Cultural resource(s), Marine Sanctuary, Marine Spatial Planning, National Park Service (NPS), National Register of Historic Places, Nationwide Rivers Inventory (NRI), Special features, Traditional cultural property (TCP)
Any biological or physical component of the marine environment that contributes to the structure, function, or services provided by a marine ecosystem.
- Browse Related Terms: [Marine] Natural Resources, BA, BO, BRD, Human environment, Psychological value., Succession
- The climate representative of relatively large area.
- Browse Related Terms: ASC, AUO, Conventional tillage, Drought, Macroclimate
- An extensive habitat presenting considerable variation of the environment, containing a variety of ecological niches and supporting a large number and variety of complex flora and fauna.
- Browse Related Terms: Ambient, Environmental Protection Agency (EPA), Exclusive Economic Zone (EEZ), High hazard, In situ, Macrohabitat, Municipal Use of Water, National Pollutant Discharge Elimination System (NPDES), Subtidal, Urbanization
- A plant large enough to be seen by the naked eye.
- Browse Related Terms: algae, Algal bloom, Ammonium, Aquatic algae, Dissolved oxygen (DO), eutrophic, Eutrophication, Flora, Forb, Giant salvinia (Salvinia molesta), Macrophytes, mesotrophic, Oligotrophic, Phytophagous, plankton
- Molten or fluid rock material from which igneous rock is derived.
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- A rating of a given earthquake, independent of the place of observation. It is calculated from measurements on seismographs and it is expressed in ordinary numbers and decimals based on a logarithmic scale. A measure of the strength of an earthquake, or the strain energy released by it, as determined by seismographic observations. See Richter scale.
- Browse Related Terms: conservation, Damping, Efficiency, EGL, EPACT, Federal Power Commission (FPC), FERC, Firm energy (power), Ground motion, Hypocenter, Kinetic Energy, Magnitude, Nonfirm commercial energy, Pollution, Potential Energy
The Magnuson-Stevens Fishery Conservation and Management Act (MSA) is the primary law governing marine fisheries management in United States federal waters. The Act was first enacted in 1976 and amended in 1996. Most notably, the Magnuson-Stevens Act aided in the development of the domestic fishing industry by phasing out foreign fishing. To manage the fisheries and promote conservation, the Act created eight regional fishery management councils. The 1996 amendments focused rebuilding overfished fisheries, protecting essential fish habitat, and reducing bycatch.
- Browse Related Terms: Biological Opinion (BO), Essential Fish Habitat (EFH), Fish & Wildlife Service (FWS), Fishery Management Councils, Fishery Management Zone, Habitat Areas of Particular Concern (HAPC), Hazardous Waste Indicators, Jeopardy opinion, Magnuson-Stevens Fishery Conservation and Management Act, No jeopardy opinion, Sensitive species
- The principal pipe artery to which branches may be connected.
- Browse Related Terms: Annular space, Bailer, Bend, Branch, Butt joint (open joint), Casing, Deflect, Elongate, Fall, Field tile, Flange, Full hydraulic capacity, Gated pipe, Hanger, Haunches (haunch), import, Main, Manifold (Header), nipple, Nominal diameter, P.T, Perforated pipe, Run, Siphon, Siphonage, tile, Vertical curve
- The deepest or central part of the bed of a stream, containing the main current.
- Browse Related Terms: Backwater, Braided Stream, Caisson, Catchment basin, Coulees, Dendritic, Eddy, Gaining stream, Losing stream, Main channel, Mainstream (mainstem), Pool
- Reach of a stream or river with a low bed elevation, relative to rapids or riffles.
- Browse Related Terms: Accretion, Anabranch, Base flow, channel, Creek, Depletion, Drainage Area, Drainage Basin, Dynamic equilibrium, Floatable flows, Headwater Basin, Headwaters, Lotic, Lotic System, Main channel pool, Main Stem, Navigable waters, River Basin, Surface water, Tributary, Watercourse
The reach of a river/stream formed by the tributaries that flow into it.
- Browse Related Terms: Accretion, Anabranch, Base flow, channel, Creek, Depletion, Drainage Area, Drainage Basin, Dynamic equilibrium, Floatable flows, Headwater Basin, Headwaters, Lotic, Lotic System, Main channel pool, Main Stem, Navigable waters, River Basin, Surface water, Tributary, Watercourse
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- The main course of a stream where the current is the strongest.
- Browse Related Terms: Backwater, Braided Stream, Caisson, Catchment basin, Coulees, Dendritic, Eddy, Gaining stream, Losing stream, Main channel, Mainstream (mainstem), Pool
- All routine and extraordinary work necessary to keep the facilities in good repair and reliable working order to fulfill the intended designed project purposes. Maintaining structures and equipment in intended operating condition, equipment repair, and minor structure repair.
- Browse Related Terms: Design summary, Designers' Operating Criteria (DOC), Duration of Protection, Enhancement, Fishing, Inactive capacity (inactive storage), maintenance, Maximum water surface (maximum pool), Minimum operating level, Normal water surface, Reservoir capacity, right, Top of inactive capacity
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- Any organized system used to ensure that all operations and maintenance activities (e.g., maintenance, inspection, operational testing) at a facility is accomplished and documented.
- Browse Related Terms: Dam tender, Earthwork, essential element, Gated spillway, Incident command system, Landfill, Logbook (operating log), Maintenance management system, OML, Posted operating instructions, Remote operation, Reservoir regulation (or operating) procedure, Review of Operation and Maintenance (RO&M), Standing Operating Procedures (SOP), Supervisory control
- A term used by Reclamation to describe those facilities for which an examination is conducted every third year, alternately conducted by the Denver and respective regional office. Major facilities include storage dams and reservoirs, diversion dams with significant storage or where major equipment and operation are complex, large pumping plants and powerplants, large canal systems, large complex closed conduit systems, and Group A bridges.
- Browse Related Terms: Annual inspection (AI), Certified water right, Comprehensive Facility Review (CFR), Evaluation report (Report for Examination No. 1, first formal examination), Examination report, Exit conference, Initial SEED examination, Intermediate SEED examination, Major facility, Ongoing Visual Inspection (OVI), Periodic Facility Review (PFR), Safety Evaluation of Existing Dams (SEED) examination, Special examination
A general term including extensive inundation and property damage. (Usually characterized by the evacuation of people and livestock and the closure of both primary and secondary roads.)
- Browse Related Terms: Catastrophe, Consequences, Direct Flood Damage, Emergency Action Plan, Emergency action plan (EAP), Exclusive Flood Control Storage Capacity, Flood control capacity, Flood Loss Reduction Measures, Hazard, Hazard classification, Incremental loss of life, Inflow design flood (IDF), Major Flooding, Minor Flooding, Moderate Flooding, Property Protection, River Observing Station
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The federal, state, commonwealth, territorial, local, or tribal entity or entities with legal authority to designate, promulgate regulations for, and/or manage an MPA. In many cases, authority lies with one agency or program, however, in certain instances, such as the federal/state National Estuarine Research Reserve System and the state/tribe co-management arrangements, authority is formally shared or split among two or more entities.
- Browse Related Terms: Advisory Council on Historic Preservation (ACHP), ALC #, Benchmark (BM), Executive Orders, FEMA, Forest Service (FS), Jurisdiction, List of National System MPAs, Management/Managing Agency or Authority, Marine Protected Areas (MPA) Inventory, National Institute for Occupational Safety and Health (NIOSH), Occupational Safety and Health Act of 1970 (OSHA), Primacy, Proratable water, Purveyor, Reportable quantities, U.S. Geological Survey (USGS), Water purveyor, Water transfers
- A large pipe to which a series of smaller pipes are connected.
- Browse Related Terms: Annular space, Bailer, Bend, Branch, Butt joint (open joint), Casing, Deflect, Elongate, Fall, Field tile, Flange, Full hydraulic capacity, Gated pipe, Hanger, Haunches (haunch), import, Main, Manifold (Header), nipple, Nominal diameter, P.T, Perforated pipe, Run, Siphon, Siphonage, tile, Vertical curve
- A coefficient used to describe the relative roughness of a channel and overbank areas; used in hydraulic computations.
- Browse Related Terms: Designated floodway, Flood Problems, Floodway, Manning's roughness coefficient (n), Natural floodway, Pioneering