- المجال: 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 ...
That depth of soil which plant roots readily penetrate and in which the predominant root activity occurs. The area where a low-angle thrust fault steepens and descends into the crust.
Industry:Engineering
The maximum value of earth pressure. This condition exists when a soil mass is compressed sufficiently to cause its internal shearing resistance along a potential failure surface to be completely mobilized.
Industry:Engineering
Water in a soil or rock mass, held by physico-chemical forces, having physical properties substantially different from absorbed water or chemically combined water, at the same temperature and pressure.
Industry:Engineering
The zone above the free water elevation in which water is held by capillary action. The porous material just above the water table which may hold water by capillarity in the smaller void spaces.
Industry:Engineering
An established river stage at a given location along a river which is intended to represent the maximum safe water level that will not overflow the river banks or cause any significant damage within the river reach.
Industry:Engineering
A flume with a specially shaped open-channel flow section that may be installed in a drainage lateral or ditch to measure the rate of flow of water. A calibrated device consisting of a broad and flat converging section, a narrow downward sloping throat, and a diverging upward sloping section developed to measure a wide range of flows in an open channel. A calibrated device, based on the principle of critical flow, used to measure the flow of water in open channels. See short-throated flume.
Industry:Engineering
A plot of the maximum response of a series of single-degree-of-freedom damped oscillators (elastic systems) as a function of their natural periods, or frequencies, when the oscillators are subjected to a vibratory ground motion. The maximum values of acceleration, velocity, and/or displacement of an infinite series of single-degree-of-freedom system subjected to an earthquake. The maximum response values are expressed as a function of natural period for a given damping. The response spectrum acceleration, velocity, and displacement values may be calculated from each other assuming a sinusoidal relationship between them.
Industry:Engineering
The physical connection (e.g. transmission lines, transformers, switch gear, etc.) between two electric systems permitting the transfer of electric energy in one or both directions.
Industry:Engineering
A horizontal conduit for intercepting and collecting ground water by gravity flow. A subsurface ground water collection system, typically shallow in depth, constructed with open-jointed or perforated pipes that discharge collected water into a water-tight chamber. From this chamber the water is pumped to treatment facilities and into a distribution system. Infiltration galleries are usually located close to streams or ponds and may be under the direct influence of surface water. A horizontal well or subsurface drain that intercepts underflow in permeable materials or infiltration of surface water.
Industry:Engineering
The dry weight of sediment per unit volume of water-sediment mixture in place, or the ratio of the dry weight of sediment to the total weight of water-sediment mixture in a sample or a unit volume of the mixture.
Industry:Engineering
