A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Impact of Agricultural Levees on Flood Hazards
This report provides an assessment and methodology for determining the impact of agricultural levees on computed flood elevations. By accounting for flood hydrograph stage, flood hydrograph volume, and the conveyance and storage of floodwaters in the protected area behind the levee system, the effect of agricultural levees on floods of a magnitude greater than the levee design can be determined. A dendritic, one-dimensional dynamic wave model was used to computer the hydraulic routing characteristics for the flooding simulations. The methodology was applied to determine these effects specifically along the Missouri River from River Miles 187 through 235. Site-specific results from this application indicate that the level of flood protection provided by the existing agricultural levee system is less than the 10-year flood. Individual reaches of the existing agricultural levee system exceed the computed 100-year flood elevations; however, the levee systems taken as a whole do not provide a consistent level of protection. Overtopping of the existing levee system fills floodplain storage over the duration of the simulated flood hydrographs. Computer flood elevations for floods of magnitude greater than the levee design profile are not affected by the temporary loss of overbank storage and conveyance.
Impact of Agricultural Levees on Flood Hazards
This report provides an assessment and methodology for determining the impact of agricultural levees on computed flood elevations. By accounting for flood hydrograph stage, flood hydrograph volume, and the conveyance and storage of floodwaters in the protected area behind the levee system, the effect of agricultural levees on floods of a magnitude greater than the levee design can be determined. A dendritic, one-dimensional dynamic wave model was used to computer the hydraulic routing characteristics for the flooding simulations. The methodology was applied to determine these effects specifically along the Missouri River from River Miles 187 through 235. Site-specific results from this application indicate that the level of flood protection provided by the existing agricultural levee system is less than the 10-year flood. Individual reaches of the existing agricultural levee system exceed the computed 100-year flood elevations; however, the levee systems taken as a whole do not provide a consistent level of protection. Overtopping of the existing levee system fills floodplain storage over the duration of the simulated flood hydrographs. Computer flood elevations for floods of magnitude greater than the levee design profile are not affected by the temporary loss of overbank storage and conveyance.
Impact of Agricultural Levees on Flood Hazards
B. R. Hall (author)
1991
46 pages
Report
No indication
English
Hydrology & Limnology , Civil Engineering , Agricultural Equipment, Facilities, & Operations , Flooding , Levees , Agriculture , Computers , Consistency , Dynamics , Elevation , Floods , Hazards , Hydraulics , Hydrography , Missouri River , Models , One dimensional , Profiles , Protection , Routing , Simulation , Storage , Volume , Water , Waves , Agricultural engineering , Hydraulic models , Flood control , Rivers , Flood plains , Peak discharge , Mathematical models , Hydrographs
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Probabilistic Design of Flood Levees
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