Analysis of Water Level Elevations and Discharge on the Lower Missouri River

摘要

Analyses of water level elevations and discharge data on the lower Missouri Riverwere made at four stations: Hermann, Missouri, at river mile 97.9; Waverly, Missouri, at river mile 293.5; St. Joseph, Missouri, at river mile 448.2; and Omaha, Nebraska, at river mile 615.9. Data were originally collected by the U.S. Army Corps of Engineers and the U.S. Geological Survey. Analysis was performed at all four stations on data collected between 1928 and early 1994. Trends for minimum, maximum, and mean water levels and discharge are all increasing at the three downriver stations. The same trend was not found at Omaha, but the data used for that station were questionable. The relationship between discharge and elevation was calculated on a yearly basis using a third-order polynomial regression. Water level elevations increased approximately 5 feet through time at the same relatively high discharge at the three downriver stations. No such trend was obvious at these three stations during relatively low discharges.