Abstract

This compilation of studies provides an examination of phosphorus dynamics in the suspended solids, water column, and lakebed sediments of Utah Lake, a large, shallow, and phosphorus-rich water body. The first study introduces a novel phosphorus microfractionation (P-MF) method designed for small samples of suspended solids and sediments. This method reveals that suspended solids in Utah Lake can have a significantly higher phosphorus content across most fractions compared to lakebed sediments, highlighting the importance of considering suspended solids in nutrient management strategies. The second study analyzes historical phosphorus mass and concentrations, demonstrating that water column phosphorus levels have remained stable over time despite significant changes in lake volume and internal phosphorus mass. This stability is attributed to sorption processes, suggesting that external phosphorus load reductions may have a limited impact on the lake's phosphorus concentrations. The third study offers a detailed geochemical analysis of near-shore sediment cores, uncovering significant chemostratigraphic variability across the lake and complex interactions between phosphorus and other ICP-detectible elements. Together, these studies provide valuable insights into the internal processes and unique characteristics of Utah Lake, thereby informing future strategies for managing phosphorus levels and improving water quality in Utah Lake and similar shallow lakes.

Degree

PhD

College and Department

Ira A. Fulton College of Engineering; Civil and Environmental Engineering

Rights

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