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Research is being conducted to determine the physical effects of navigation on the Upper Mississippi River System (UMRS). Extensive field data on various aspects of physical effects of navigation within the UMRS are being collected and analyzed. The data acquisition program developed by the Illinois State Water Survey (ISWS) uses automated data logging systems for data collected with a number of measuring instruments, including current meters, electronic wave gages, wind monitors, turbidity meters, and pressure transducers. Suspended sediment is collected by a series of continually pumped sampling systems.
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To determine the characteristics of waves generated by recreational craft within the Upper Mississippi River System (UMRS), 246 controlled runs were made at an Illinois River site and a Mississippi River site. Data showed that recreational boats can generate from 4 to 40 waves per event, with a mean of about 10 to 20 waves. Average wave heights varied from 0.01 to 0.25 meter, with a median of about 0.06 to 0.12 meter. The maximum wave height was as much as 0.6 meter. The data were used to develop a regression equation for estimating maximum wave heights on the basis of the speed, draft, and length of the oats, and their distance from the measuring point. Data from uncontrolled boating events on the Mississippi River...
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