Incorporating water quality analysis into navigation assessments as demonstrated in the Mississippi River Basin
A description of historical and ambient water quality conditions is often required as part of navigational studies. This paper describes a series of tools developed by the USGS that can aid navigation managers in developing water quality assessments. The tools use R, a statistical software program, and provide methods to retrieve historical streamflow and water quality data, summarize observations, model concentrations and fluxes, and estimate seasonal, annual, and decadal trends. The utility of these tools is demonstrated by providing an analysis of the seasonal variability and long-term trends of nitrate plus nitrite, orthophosphate, and suspended sediment concentrations and fluxes at nine sites in the Mississippi River Basin. Trends in annual mean concentration and flux showed fairly stable nitrate plus nitrite at most of the nine sites, with increases in the Upper Mississippi and Missouri Rivers and decreases on the Illinois River over a 40-year period beginning in 1980. Orthophosphate concentration or flux increased at almost all sites over a similar time period. Conversely, a concurrent steady decline in suspended sediment concentrations and fluxes was noted at sites throughout the basin.
Citation Information
| Publication Year | 2021 |
|---|---|
| Title | Incorporating water quality analysis into navigation assessments as demonstrated in the Mississippi River Basin |
| DOI | 10.1061/(ASCE)WW.1943-5460.0000651 |
| Authors | Barbara Kleiss, Jennifer C. Murphy, Casey M. Mayne, Jake P. Allgeier, Amanda B. Edmondson, Katrina C. Ginsberg, Keaton E. Jones, Timothy J. Lauth, Emily L. Moe, Julie W. Murphy, Mead Allison |
| Publication Type | Article |
| Publication Subtype | Journal Article |
| Series Title | Journal of Waterway, Port, Coastal, and Ocean Engineering |
| Index ID | 70221869 |
| Record Source | USGS Publications Warehouse |
| USGS Organization | Central Midwest Water Science Center |
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Data to Incorporate Water Quality Analysis into Navigation Assessments as Demonstrated in the Mississippi River Basin
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Data to Incorporate Water Quality Analysis into Navigation Assessments as Demonstrated in the Mississippi River Basin
This data release includes estimates of annual and monthly mean concentrations and fluxes for nitrate plus nitrite, orthophosphate and suspended sediment for nine sites in the Mississippi River Basin (MRB) produced using the Weighted Regressions on Time, Discharge, and Season (WRTDS) model (Hirsch and De Cicco, 2015). It also includes a model archive (R scripts and readMe file) used to retrieve an - Connect