- 産業: Government
- Number of terms: 15655
- Number of blossaries: 0
- Company Profile:
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 ...
The moisture content corresponding to the arbitrary limit between the liquid and plastic states of consistency of a soil. The water content at which a pat of soil, cut by a groove of standard dimensions, will flow together for a distance of 1/2 inches under the impact of 25 blows in a standard liquid limit apparatus. Minimum moisture content which will cause soil to flow if jarred slightly.
Industry:Engineering
The total space occupied by the materials forming the dam structure computed between abutments and from the top to the bottom of the dam. No deduction is made for small openings such as galleries, adits, tunnels, and operating chambers within the dam structure. Portions of power plants, locks, spillway, etc., may be included only if they are necessary for the structural stability of the dam.
Industry:Engineering
The individual responsible on a day-to-day basis for a jurisdiction's effort to develop a capability for coordinated response to and recovery from the effects of emergencies and large-scale disasters. This official may be called the local emergency manager, civil defense director, disaster preparedness coordinator, or other similar title; the duties may vary from jurisdiction to jurisdiction.
Industry:Engineering
The practice by which two or more interconnected electric power systems augment the reliability of bulk electric power supply by establishing planning and operating standards; by exchanging pertinent information regarding additions, retirements, and modifications, to the bulk electric power supply system; and by joint review of these changes to assure that they meet the predetermined standards.
Industry:Engineering
A crop that provides temporary protection for delicate seedlings and/or provides a canopy for seasonal soil protection and improvement between normal crop production periods. Except in orchards where permanent vegative cover is maintained, cover crops usually are grown for one year or less. When plowed under and incorporated into the soil, cover crops are also referred to as green manure crops.
Industry:Engineering
A gradual wearing away of soil or rock by running water, waves, or wind. Concrete surface disturbance caused by cavitation, abrasion from moving particles in water, impact of pedestrian or vehicular traffic, or impact of ice floes. Surface displacement of soil caused by weathering, dissolution, abrasion, or other transporting. The gradual wearing away of material as a result of abrasive action.
Industry:Engineering
Manmade deposits of natural soils or the process of the depositing. Manmade deposits of natural soils or rock products and waste materials designed and installed in such a manner as to provide drainage, yet prevent the movement of soil particles due to flowing water. An earth or broken rock structure or embankment. Soil or loose rock used to raise a grade. Soil that has no value except as bulk.
Industry:Engineering
A section of concrete or riprap constructed upstream or downstream from a control structure to prevent undercutting of the structure. A short ramp with a slight pitch. A floor or lining of concrete, timber, or other suitable material at the toe of a dam, discharge side of a spillway, a chute, or other discharge structure, to protect the waterway from erosion from falling water or turbulent flow.
Industry:Engineering
The capacity for powerplants is the nameplate rating in kW (kilowatts) and generally includes only the main generating units, except for very large plants such as Grand Coulee and Hoover where the station service units are included in the total rated capacity. Maximum flow that can pass through the turbines at a dam. Also refers to the electrical capacity of the generators expressed in megawatts.
Industry:Engineering
Modification of the input bedrock ground motion by the overlying unconsolidation materials. Amplification causes the amplitude of the surface ground motion to be increased in some range of frequencies and decreased in others. Amplification is a function of the shear wave velocity and damping of the unconsolidated materials, its thickness and geometry, and the strain level of the input rock motion.
Industry:Engineering
