|
<br />GLOSSARY OF TERMS
<br />
<br />Channel - A natural or artificial water course of perceptible extent
<br />with definite banks to confine and conduct continuously or period-
<br />ically flowing water. Channel flow is that water which is flowing
<br />within the limits of the defined channel.
<br />
<br />Flood - Water from a river, stream, water course, lake or other body
<br />of standing water, that temporarily overflows the boundaries within
<br />which it is ordinarily confined.
<br />
<br />Flood Crest - The maximum stage or elevation reached by the waters of,
<br />a flood at a given location.
<br />
<br />Flood Frequency - A means, of expressing the probability of flood occur-
<br />rences as determined from a statistical analysis of representative
<br />stream flow or rainfall ,and runoff records. The frequency of a
<br />particular stage or discharge is usually' expressed as occurring
<br />once in 'a specified number of years. The 10-, 25-, 50-, 100-, and
<br />SOO-year frequency floods have an average frequency of occurrence
<br />in the order of once in the,number of years as indicated.
<br />
<br />10-Year Flood - A flood having an average frequency of, occurrence
<br />of once in 10 years. It has a 10 percent chance of being
<br />equalled or exceeded in any given year.
<br />
<br />100-Year Flood - A flood having an average frequency of occurrence
<br />of once in 100 years., It has a 1 percent chance of being
<br />equalled or exceeded in any given year.
<br />
<br />Flood Peak - The highest stage or discharge attained during a flood
<br />event; also referred to as peak stage or peak discharge.
<br />
<br />Flood Plain - The relatively flat or low land area adjoining a river,
<br />stream, watercourse, lake, or other body of standing water which
<br />has been or may be covered temporarily by flood water. For admini-
<br />strative purposes the flood plain may be defined as the area that
<br />would be inundated by the 100-year flood.
<br />
<br />Reach - A hydraulic engineering term used to describe longitudinal
<br />segments of a stream or river.
<br />
<br />Runoff - That part of precipitation, as well as any other flow con-
<br />tributions, which appears in surface streams of either perennial or
<br />intermittent form.
<br />
<br />Stream - Any natural channel or depression through which water flows
<br />whether continously, Intermittently, or periodically, including
<br />modification of the natural channel or depression.
<br />
<br />C - 7
<br />
<br />Structure _ Anything constructed or erected, the use of which requires
<br />a more or less permanent location on or in the ground. I~cludes
<br />but is not limited to bridges, buildings, canals, dams, dlt:hes,
<br />diversions, irrigation systems, pumps, pipelines,.pumps, railroads,
<br />roads, sewage disposal systems, underground conduits, water supply
<br />systems, and wells.
<br />
<br />Ty 'cal Valley Cross Sectlon- An engineering drawing of a ve;tical.
<br />_pi section of a stream channel and adjoining landscape ~s.vlewed '~ a
<br />downstream direction. The drawing represents a specified location
<br />within a designated stream reach.
<br />
<br />Water Surface Profile - (This term is synonymous with - Flood pro:ile) -
<br />a graph showing the relationship of the water.surface elevation of
<br />a flood event to location along a stream or river.
<br />
<br />Watersheds - A drainage
<br />mits it usually by
<br />of the basin.
<br />
<br />basin
<br />means
<br />
<br />or area which collects runoff and trans-
<br />of streams and tributaries to the outlet
<br />
<br />BIBLIOGRAPHY
<br />
<br />Elevated Residential Structures - Reducing flood damage through bu!lding
<br />design _ FIA, National Flood Insurance Program, Department of HOUSing
<br />and Urban Development - 1976
<br />
<br />Federal Register - National Flood Insurance Program - October 26, 1976
<br />
<br />Guidelines for Determining Flood Flow Frequency - Bulletin N6. 17 -
<br />u. S. Water Resources Council, Washington, D. C., March, 197
<br />
<br />1 d Characteristics of Natural Flow Streams in
<br />Manual for Estimating Food
<br />1 No. I-Colorado Water Conservation Boar,
<br />Colorado - Technical Manua
<br />
<br />1976
<br />
<br />Manual for Local Governments, Flood Plain Manageme~t, F100~ C~ntro19;6d
<br />Flood Disaster Programs - Colorado Water Conservation Boar, une
<br />
<br />losses, Volumes One and
<br />D. C., 1971 and 1972
<br />
<br />Regulation of Flood Hazard Areas ~o reduc: flood
<br />Two - U. S. Water Resources Council, Washington,
<br />
<br />C - 8
<br />
|