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AUTHORS: Brian Korman, National Park Service; Gerald Mestl, Nebraska Game and Parks Commision
ABSTRACT: The 2011 Missouri River high water event caused significant ecological and physical changes to the Missouri National Recreational River. Observation and subsequent hypotheses related to these changes inspired the replication of a 1989 study, “Cross-sectional Analysis of Sediment and Organic Matter from Transects across the Lower Unchannelized Missouri River”, published by the Nebraska Game and Parks Commission in 1990.
The same methods were followed at eight of the same locations within the MNRR 59-Mile District. At each location transects were followed from bank to bank and sediment samples were collected every 50 feet. Samples were analyzed for particle size and organic matter content. The objective of the current study is to compare bed sediments collected in 2016 to those collected in 1989 to help understand what changes have occurred over time. A secondary goal was to understand how sediments collected in 2016 vary spatially within the 59-Mile District of the MNRR relative to tributary inputs and other physical attributes of the MNRR. This talk will present preliminary results of this ongoing cooperative research effort between the National Park Service and Nebraska Game and Parks Commission.
