Arboriculture Glossary of Terms
u
- UAAUtility Arborist Association
- UFCUniform Fire Code. Urban Forest Council
- UFOREUrban Forest Effects Model (now i-Tree ECO)
- UFORE (Urban Forest Effects model)system that uses field data to provide information on the amount and value of atmospheric contaminant removal. carbon storage. and energy conservation.
- unavailable watersoil water that is held so tightly to the soil particles that it cannot be absorbed by plant f roots (contrast with available water).
- uncertainty reductionrisk control strategy in which one attempts to learn more about the risk in order to increase the ability to predict what will happen.
- undercutcut on the underside of a branch or stem being removed to prevent unwanted tearing as the part being removed falls.
- undifferentiatedPlant tissue that has not developed into roots. stems. buds. cambium. or other identifiable plant organs or structures
- Uniform Fire Codein the United States. regulations that address and specify fire prevention standards and measures. Affects utility arboriculture because it defines minimum clearance distances to be maintained between vegetation and electrical conductors. Also addresses issues pertaining to flammable liquids. hazardous materials storage. explosives. and new construction and building operations.
- urban forest management plandocument that describes how urban forestry goals are to be accomplished within a defined time frame; includes tasks. priorities. best management practices. standards. specifications. budgets. and staffing analyses.
- urban foresteran individual trained in or practicing ' urban forestry. "
- urban forestrymanagement of naturally occurring and planted trees and associated plants in urban areas.
- urban heat islandphenomenon of cities having air temperatures warmer than adjacent rural areas and producing more smog.
- Urban-Wildland Interface Codefire prevention standards and regulations developed by the International Fire Code Institute that define the difference between urban areas and wildlands. In utility arboriculture. defines minimum clearance distances around electrical lines. Also addresses proper planning. construction techniques. defensible space. vegetation control. and land uses.
- USDAUnited States Department of Agriculture
- USGBCU.S. Green Building Council
- USTunderground storage tank
- utility1) a public or private entity that provides products or services. including communications. electricity. natural gas. transportation. and water. 2) the facilities associated with any particular utility. 3) an economic concept considered in the appraisal of monetary value; the ability to satisfy human desires. needs. and wants; the quality of usefulness.
- utility arboriculturesector of the arboriculture industry that provides services to utilities that often requires specialized equipment and training of workers. Includes utility line-clearance pruning right of-way clearing and maintenance. and Integrated Vegetation Management.
- utility line-clearance pruningselective removal of vegetation. especially tree branches. that could affect electric supply lines or other utility facilities.
- utility line clearance pruningselective removal of vegetation. especially tree branches. that could affect electric supply lines or other utility facilities.
- utility pruningpruning around or near utility facilities with the object of maintaining safe and reliable utility service.
- utility vegetation managera professional with the proper experience. education. and training to successfully establish or supervise an integrated vegetation management program.
- UVMutility vegetation management
- UWICUrban-Wildland Interface Code