Masters Theses

Keywords and Phrases

Loading; Missouri; Nitrate; Nutrient; Phosphate; Streams


"This report presents the results of a study carried out in collaboration with the U.S. Geological Survey (USGS) and the Missouri Department of Natural Resources (MDNR) to estimate total nitrogen (TN) and total phosphorus (TP) at five USGS monitoring sites within Lower Grand River Watershed (LGRW) and two monitoring sites on the Missouri River. The objective of this study was to quantify temporal changes in TN and TP concentrations and compare those to best management practices (BMPs).

In this study, the approach to the analysis of long-term surface water-quality data by using Weighted Regressions on Time, Discharge and Seasons models (WRTDS). The model method is formulated to enable flexibility in long-term trend representations, discharge-related components, and concentrations of TN and TP seasonal components. The WRTDS model is designed make estimates of the actual concentrations and fluxes as well as estimates that eliminate the influence of year-to-year variations in discharge. The method is designed to use weighted regressions on time, discharge and season to estimate concentrations. This method is designed to be a tool which identifies changes that are taking place within a watershed related to surface-water nonpoint sources of contamination.

In this case, the results given by the WRTDS models were used to determine if best management practices implemented over the study period, have had any significant effect on TN and TP concentrations. At each monitoring location, water quality data was compared to temporal changes within the watershed to determine the effectiveness of BMPs implemented over the study period"--Abstract, page iii.


Grote, Katherine R.

Committee Member(s)

Rogers, J. David
Smith, Ryan G.


Geosciences and Geological and Petroleum Engineering

Degree Name

M.S. in Geological Engineering


Missouri University of Science and Technology

Publication Date

Fall 2019


x, 40 pages

Note about bibliography

Includes bibliographical references (pages 38-39).

Geographic Coverage

Lower Grand River Watershed, Missouri; Saint Joseph, Missouri; Hermann, Missouri


© 2019 Weston Scott Duley, All rights reserved.

Document Type

Thesis - Open Access

File Type




Thesis Number

T 11620

Electronic OCLC #



Thesis Location