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The term 100-year flood indicates that the area has a one-percent chance of flooding in any given year, not that a flood will occur every 100 years. [2] Such maps are used in town planning, in the insurance industry, and by individuals who want to avoid moving into a home at risk of flooding or to know how to protect their property. FIRMs are ...
The flood is blamed for at least ten deaths. [1] The floods were historic, breaking records that went back more than a century in some locations. The Chattahoochee River, the largest river in the region, measured water levels at a 500-year flood level. [2]
For coastal or lake flooding, a 100-year flood is generally expressed as a flood elevation or depth, and may include wave effects. For river systems, a 100-year flood is generally expressed as a flowrate. Based on the expected 100-year flood flow rate, the flood water level can be mapped as an area of inundation. The resulting floodplain map is ...
Counties of Alabama Alabama counties (clickable map) Location State of Alabama Number 67 Populations Greatest: 662,895 (Jefferson) Least: 7,341 (Greene) Average: 76,246 (2023) Areas Largest: 1,590 sq mi (4,100 km 2) (Baldwin) Smallest: 535 sq mi (1,390 km 2) (Etowah) Average: 782 sq mi (2,030 km 2) Government County government Subdivisions cities, towns, unincorporated communities, census ...
The county is currently using 500-year flood maps to indicate areas where residents should be ready to evacuate. "We are using the 500-year flood plain maps as kind-of a guide.
The stream rises in northern Lawrence County, Tennessee, and enters the Tennessee River in Lauderdale County, Alabama, where its lower reaches are impounded in the backwater of Wilson Dam. Historically, Shoal Creek (Sycamore River) was an important source of water power for the cotton industry in Lawrence County. [3]
The Grand River went above bankfull on the night of March 24, rising slowly for the next four days. It broke the previous high-water mark by over 60 cm (2.0 ft), and was considered a once in 100 year flood. Over one-half of the population on the west side of the river was inundated. On the east bank of the river, numerous factories went underwater.
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related to: 100 vs 500 year floodplain map alabama county records list by zip code