Flood Hazard Analyses Upper Grand River, Jackson County, MichiganU.S. Soil Conservation Service, 1976 - Всего страниц: 58 |
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100 feet east 100-year flood 100-YEAR FREQUENCY FLOOD AGRICULTURE SOIL CONSERVATION Analyses Jackson County approximately 600 feet AREAS JACKSON COUNTY Blackman Township Bridge deck Road Bridge low clearance Chiseled square City of Jackson CONSERVATION SERVICE Date corner fence County Bench Mark Datum deck Road overflow DEPARTMENT OF AGRICULTURE Disk and nail ELEVATION ABOVE MEAN Falahee feet north feet south feet west Flood Hazard Analyses FLOOD HAZARD AREAS flood insurance flood plain management Grand River Flood GRAND RIVER Upper Ground Channel Bottom Hazard Analyses Jackson HIGH WATER PROFILES Interstate 94 Jackson County Bench Jackson County Elevation Low Ground Channel Maple Grove Road MEAN SEA LEVEL Michigan U.S. DEPARTMENT northeast corner painted yellow Penn Central photomosaic Portage River power pole PROFILES GRAND RIVER River Flood Hazard RIVER Upper Grand SERVICE UPPER GRAND SOIL CONSERVATION SERVICE southwest corner stream gage Summit Township Upper Grand River WATER PROFILES GRAND wingwall
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Стр. 6 - Base Flood means the flood which has a one percent chance of being equalled or exceeded in any given year (also known as a 100-year flood).
Стр. 6 - Also called bypass channel, flood way . flood routing — The process of determining progressively the timing and shape of a flood wave at successive points along a river.
Стр. 8 - Runoff is that part of the precipitation, as well as any other flow contributions, which appears in surface streams of either perennial or intermittent form. This is the flow collected from a drainage basin or watershed, and it appears at an outlet of the basin.
Стр. 7 - ... completely fills the voids of the bedrock and drift. ground-water level (water table). The level below which the bedrock or drift is saturated with water. Usually a subdued replica of the surface topography. ground moraine. Debris deposited underneath the glacier directly by the ice. hydrology. An earth science dealing with the occurrence and movement of water upon and beneath the land areas of the earth. ice-contact deposit. Material deposited by meltwater streams near or at the margin of a...
Стр. 8 - The time of concentration for a watershed is defined as the time required for water to flow from the most remote point of the watershed to the outlet.
Стр. 6 - Flood frequency A means of expressing the probability of flood occurrences as determined from a statistical analysis of representative stream flow records. It is customary to estimate the frequency with which specific flood stages or discharges may be equalled or exceeded, rather than the frequency of an exact stage or discharge. Such estimates by strict definition are designated "exceedence frequency," but in practice the term "frequency
Стр. 6 - Wind and water loading values shall each have a one percent chance of being equalled or exceeded in any given year (100year mean recurrence interval).
Стр. 5 - The lowest point of a bridge or other structure over or across a river, stream, or water course that limits the opening through which water flows. This is referred to as "low steel