Anthropogenic Influences on an Urban River: Differences in Cations and Nutrients along an Urban/Suburban Transect
نویسندگان
چکیده
The Anacostia River in Washington, D.C. has been experiencing the challenges typical of urban rivers over last 70+ years. Here, we examine six years (2014 to 2020) base-flow geochemistry three tidal sites and suburban sites. Parameters examined include pH, hardness, SAR, alkalinity, TDS, Ca, Mg, Na, K, Fe, Mn, Zn, Al, As, B, Ba, Be, Cd, Cr, Cu, Co, Mo, Ni, Pb, total P, S, Sr, Ti, NO3−, NH4+. Not surprisingly, winter spring months showed very high Na (means 786 mg/L 1000 mg/L, respectively). Plotting Na/(Na + Ca) versus TDS shows contributions from groundwater, but also differences major world rivers. Main stem locations usually had Ca/Sr ratios > 200, suggesting that concrete was source Ca; however, Ca as well were frequently <200, indicating a different for Ca. Most low median Si:NO3 (between 3 5), elevated NO3− non-natural sources. data are consistent with freshwater salinization syndrome (a specific type stream syndrome), show developed landscape environments influences differently than environments.
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ژورنال
عنوان ژورنال: Water
سال: 2022
ISSN: ['2073-4441']
DOI: https://doi.org/10.3390/w14091330