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<br />BIBLIOGRAPHY
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<br />GLOSSARY
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<br />1. Bell Mapping Company, "Topography Map for Middle and South St.
<br />Vrain Creek Flood Plain Study", Denver, Colorado, October, 1977.
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<br />Backwater Effect. The rise in surface elevation of flowing water up-
<br />stream from and as a result of an obstruction to flow.
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<br />2. Colorado Division of Water Resources, Unpublished Streamflow
<br />Charts, Denver, Colorado.
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<br />Channel. A natural or artificial watercourse of perceptible extent with
<br />definite bed and banks to confine and convey continuously or per-
<br />iodically flowing water.
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<br />3. U.S. Department of the Army, Corps of Engineers, Hydrologic
<br />Engineering Center, "HEC-2, Water Surface Profiles, Generalized
<br />Computer Program," Davis, California, November, 1976.
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<br />Cloudburst. A sudden and extremely heavy downpour of rain that is small
<br />in areal extent; of short duration; and may be accompanied by
<br />lightning, thunder, and strong gusts of wind.
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<br />4. U.S. Department of the Army, Omaha District Corps of Engineers,
<br />"Flood Plain Information Upper St. Vrain Creek, Volume IV, Boulder
<br />County, Colorado", Omaha, Nebraska, September, 1972.
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<br />Designated Floodplain. The area designated as a floodplain by official
<br />action of the Board of County Commissioners or City Council with
<br />the prior concurrence of the Colorado Water Conservation Board.
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<br />5. U.S. Department of the Interior, Geological Survey, Water-Supply
<br />Paper 1680, "Magnitude and Frequency of Floods in the United
<br />States", Part 6-B, Washington, D.C., 1968.
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<br />Flood. An overflow on lands not normally covered by water and that are
<br />used or usable by man. Floods have two essential characteristics;
<br />the inundation of land is temporary; and the land is adjacent to
<br />and inundated by overflow from a river or stream or an ocean, lake
<br />or other body of standing water.
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<br />6. -------------------------, Water-Supply Paper 1918, "Surface Water
<br />Supply of the United States 1961-1965", Part 6, Volume 3,
<br />Washington, D.C., 1969.
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<br />7. -------------------------, Water-Supply Paper 2118, "Surface Water
<br />Supply of the United States 1966-1970", Part 6, Volume 3,
<br />Washington, D.C., 1973.
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<br />Normally a flood is considered as any temporary rise in stream flow
<br />or stage, but not the ponding of surface water, that results in
<br />significant adverse effects in the vicinity. Adverse effects may
<br />include damages from overflow of land areas, temporary backwater
<br />effects in sewers and local drainage channels, creation of unsani-
<br />tary conditions or other unfavorable situations by deposition of
<br />materials in stream channels during flood recessions, use of
<br />groundwater coincident with increased stream flow, and other
<br />problems.
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<br />8. -------------------------, "Water Resources Data for Colorado",
<br />Part 1, Surface Water Records, 1971-1974, Denver Federal Center,
<br />Lakewood, Colorado.
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<br />9. -------------------------, Water-Supply Paper 977, "Floods in
<br />Colorado", Washington, D.C., 1948.
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<br />Flood, 100-Year. A type of flood, including the water surface elevation
<br />and territorial occupation thereof, which can be expected to occur
<br />at any time in a given area based upon recorded historical precip-
<br />itation and other valid data, but with an average statistical one
<br />percent change of being equalled or exceeded during anyone year.
<br />The term is used interchangeably with a one percent flood or
<br />Intermediate Regional Flood (see definition for Intermediate
<br />Flood).
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<br />10. -------------------------, Unpublished Streamflow Charts, Denver
<br />Federal Center, Lakewood, Colorado.
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<br />11. U.S. Water Resources Council, "Guidelines for Determining Flood
<br />Flow Frequency", Bulletin tll7 of the Hydrology Committee,
<br />Washington, D.C.,.March, 1976.
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<br />Flood Crest.
<br />flood at
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<br />The maximum stage or elevation reached by the water of a
<br />a given location.
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<br />Flood Frequency. (See Probability.) The average recurrence interval of
<br />specific discharges or water stages which cause flooding.
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<br />Flood Peak. The maximum instantaneous discharge of a flood at a given
<br />location. It usually occurs at or near the time of the flood
<br />crest.
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