“…There is a long history in the fields of hydrology and biogeochemistry of determining the sources of solute fluxes in rivers, particularly where solute loads are elevated due to anthropogenic influences (Alexander, Boyer, Smith, Schwarz, & Moore, ; Flewelling, Herman, Hornberger, & Mills, ; Mulholland, ; Tesoriero, Duff, Saad, Spahr, & Wolock, ; Tesoriero, Duff, Wolock, Spahr, & Almendinger, ; Yevenes & Mannaerts, ). Soil type, bedrock presence and permeability, terrain, and urbanization are some of the factors that influence the dominant routing pathways for solutes in watersheds (Buda & DeWalle, ; Hiscock, ).…”