- 産業: Government
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A U.S. Department of the Interior agency that oversees water resource management incuding the oversight and operation of numerous diversion, delivery, and storage projects the agency has built throughout the western United States for irrigation, water supply, and attendant hydroelectric power ...
Principal organization for coordinating and promoting reliability for North America's electric utilities. NERC was formed in 1968 in the aftermath of the November 9, 1965 northeast blackout. A council formed in 1968 by the electric utility industry to promote the reliability and adequacy of bulk power supply in the electric utility systems of North America. NERC consists of ten regional reliability councils and encompasses essentially all the power regional of the contiguous United States, Canada, and Mexico. The NERC Regions are: Alaskan System Coordination Council (ASCC)
Industry:Engineering
An electrical device designed to protect people (not equipment) from electrical shock. The GFCI is a very sensitive device that can detect ground leakage currents as low as 5 milliamperes. The GFCI can be provided as part of a receptacle or as part of a circuit breaker. When the GFCI detects a ground leakage current, it either deenergizes the receptacle or trips the circuit breaker. Whether the GRCI is part of a receptacle or part of a circuit breaker, it will have a TEST button. Pressing the TEST button will operate the GFCI device and deenergize the circuit. The receptacle will have a RESET button and the circuit breaker is manually reset by hand.
Industry:Engineering
The Edison Electric Institute is an association of electric companies formed in 1933 "to exchange information on industry developments and to act as an advocate for utilities on subjects of national interest."
Industry:Engineering
Electric service is traditionally provided on a bundled basis, meaning that generation, transmission, and distribution services are provided as a single package. By unbundling, the packaged offering of the various services that make up traditional utility service are separated into discreet, separately-priced components. An example would be selling electric power distribution as a separate service without including costs associated with power generation or transmission services. Unbundling could allow the customer to select a different supplier or source for each of the components required to obtain a product or service.
Industry:Engineering
A circular or glory hole form of a drop inlet spillway. Usually free standing in the reservoir and so called because of its resemblance to the morning glory flower. See shaft spillway.
Industry:Engineering
Lowering of a reservoir's water level; process of depleting a reservoir or ground water storage. The drop in the water table or level of water in the ground when water is being pumped from a well. Vertical distance the free water surface elevation is lowered or the reduction of the pressure head due to the removal of free water. The difference between a water level and a lower water level in a reservoir within a particular time. The amount of water used from a reservoir.
Industry:Engineering
A generating plant which uses heat to create steam driven electricity. Such plants may burn coal, gas, oil, wood, waste; or use nuclear, solar, and geothermal energy to produce thermal energy.
Industry:Engineering
An arbitrary scale to describe the degree of shaking at a particular place. The scale is not based on measurement, but on assessment by an experienced observer. A numerical index describing the effects of an earthquake on mankind, on structures built by mankind, and on the earth's surface. The scale in common use in the U. S. today is the Modified Mercalli Scale of 1931 with grades indicated by Roman numerals from I to XII. For more information, visit the U.S. Geological Survey National Earthquake Information Center.
Industry:Engineering
The responsibility for ensuring that a law is implemented, and the authority to enforce a law and related regulations. A primacy agency has the primary responsibility for administrating and enforcing regulations.
Industry:Engineering
An alluvial sediment deposit normally formed where a river or stream enters a lake or estuary. Flat land mass of sediment deposit formed at the mouths of streams where they enter larger bodies of water. Sediment deltas are usually triangular in plan view, narrow at the upstream end and relatively wide at the downstream end. The sediment particles deposit because the river velocity and gradient are too low to keep the particles in motion. Active deltas contain diverging multiple channels that continually deposit sediment and migrate back and forth across the delta surface. The sediment particles of the delta deposit are usually well sorted such that the coarser particles (gravel and sand) deposit first at the upstream end, while finer particles (silt and clay) deposit farther downstream. A fan-shaped area at the mouth of a river.
Industry:Engineering
