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•Management strategies for flood protection in the Lower Illinois River, Phase I: Development of the Lower Illinois River-Pool 26 UNET model (1)
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Management strategies for flood protection in the Lower Illinois River, Phase I: Development of the Lower Illinois River-Pool 26 UNET model

 
 Volume/Number:  2001  
 Issuing Agency:   
 Description:  One of the main concerns was the ability to specify proper stage hydrographs at the downstream boundary of the Lower Illinois River for hydraulic design and analysis. We found that a unique stage-discharge rating relationship does not exist at the lower boundary of the Lower Illinois River at Grafton because of backwater effects from the Upper Mississippi River. Management options and results for managed storage and emergency activities need to be analyzed under more comprehensive design of flooding conditions. To improve the capability of UNET for modeling backwater effects for the Lower Illinois River, an extended model including Pool 26 of the Upper Mississippi River was developed. The downstream stations of the model are at the tail of Lock and Dam 25 and the Mel Price Lock and Dam pool, where stage readings are available. The model was calibrated with a 1979 flood and verified with a 1983 flood. Discharge and stage frequency analysis have also been performed for stations at Troy on Cuivre River, Lock and Dam 25 tail, Lock and Dam 26 pool, and Mel Price Lock and Dam on the Mississippi River. 
 Date Created:  9 24 2004 
 Agency ID:  CR-2001-10 
 ISL ID:  000000000840   Original UID: 999999994323 FIRST WORD: Management