- 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 ...
A periodic evaluation of operation and maintenance activities at a particular facility. The RO&M program recognizes the following three categories for reporting deficiencies:
: Category 1 - Recommendations involving the correction of severe deficiencies where immediate and responsive action is required to ensure structural safety and operational integrity of a facility.
: Category 2 - Recommendations covering a wide range of important matters where action is needed to prevent or reduce further damage or preclude possible operational failure of a facility.
: Category 3 - Recommendations covering less important matters but believed to be sound and beneficial suggestions to improve or enhance the operations and maintenance (O&M) of the project or facility.
Industry:Engineering
A layer of large uncoursed stones, broken rock, boulders, precast blocks, bags of cement, or other suitable material generally placed in random fashion on the upstream and downstream faces of embankment dams, stream banks, on a reservoir shore, on the sides of a channel, or other land surfaces to protect them from erosion or scour caused by current, wind, wave, and/or ice action. A protective blanket of large loose stones, which are usually placed by machine to achieve a desired configuration. Riprap is usually placed by dumping or other mechanical methods but, in some cases, is hand placed. It consist of relatively large pieces as distinguished from a gravel blanket. Very large riprap is sometimes referred to as "armoring."
Industry:Engineering
The decrease in volume, expressed as a percentage of the soil mass when dried, of a soil mass when the moisture content is reduced from a given percentage to the shrinkage limit.
Industry:Engineering
The total space occupied by concrete 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. The volume includes all mass concrete appurtenances not separated from the dam by construction or contraction joints. Where a powerplant is located at the downstream toe of a concrete dam, the limit of concrete in the dam should be taken as the downstream face projected to the general excavated foundation surface.
Industry:Engineering
Certification signatures are those of the persons who co-facilitated the risk analysis. These signatures signify that Reclamation methodology, processes, and requirements were followed. In addition, these signatures verify that qualifications of the persons making various probability estimates were appropriate. The purpose of endorsing qualifications is to reduce the potential for inappropriate estimates, or conflicts, arising from limited qualifications that might result in total rejection of risk analysis findings. Certification signatures also signify that the spirit of the risk analysis and team dynamics are represented by the document. In other words, any divergent views, critical issues or significant influencing factors have been captured. This is a check of the author's responsibility to fully capture and represent the team's thinking.
Industry:Engineering
The point or focus within the earth which is the center of an earthquake and the origin of its elastic waves. The location within the Earth where the sudden release of energy is initiated. The focus of an earthquake.
Industry:Engineering
Measure of extent to which light passing through water is reduced due to suspended materials (see nephelometric). The optical property of water based on the amount of light reflected by suspended particles. Cloudiness of water, measured by how deeply light can penetrate into the water from the surface. The cloudy appearance of water caused by the presence of suspended and colloidal matter. The scattering and absorption of light that makes the water look murky. Caused by the content and shape of matter suspended in the water. The state of having sediment or foreign particles suspended or stirred up in water.
Industry:Engineering
A water-bearing stratum of permeable rock, sand, or gravel. A water-bearing formation that provides a ground water reservoir. Underground water-bearing geologic formation or structure. A geologic formation, group of formations, or part of a formation that stores and transmits water and yields significant quantities of water to wells and springs. A natural underground layer of porous, water-bearing materials (sand, gravel) usually capable of yielding a large amount or supply of water.
Industry:Engineering
A potentially harmful physical, biological, chemical or radiological substance in water. Any physical chemical, biological, or radiological substance or matter that has an adverse effect on air, water, or soil.
Industry:Engineering
A pool located below a spillway, gate, or valve into which the discharge dissipates energy to avoid downstream channel degradation. An unlined stilling basin usually constructed in natural ground or rock.
Industry:Engineering
