CHEM 1223A

haq [at] umd [dot] edu

Sujay Kaushal

Enhanced river chemical loads have the potential to release stored nutrients and metals from sediments, alter weathering rates, decrease biodiversity, and jeopardize public health. The magnitude and frequency of these chemical inputs may be amplified in the near future due to the interactive effects of climate variability, urban population growth, and land use changes.

I am investigating the spatial and temporal trends in anthropogenic inputs of base cations to urban rivers, the hydrologic controls on these inputs, and the subsequent perturbation on stream chemistry and biogeochemical cycles. My research is concentrated on urbanized watersheds in the Baltimore-Washington Metropolitan area and couples laboratory (ex-situ) experiments with high-frequency sensor data; all within the urban watershed continuum and urban evolution frameworks.

Kaushal, S. S., Duan, S., Doody, T. R., Haq, S., Smith, R.M., Newcomer Johnson, T.A., Delaney Newcomb, K., Gorman, J., Bowman, N., Mayer, P.M., Wood, K.L., Belt, K.T., Stack, W.P. (2017) Human-Accelerated Weathering Increases Salinization, Major Ions, and Alkalinization in Fresh Water Across Land Use. Applied Geochemistry. 83 121-135. DOI: 10.1016/j.apgeochem.2017.02.006

Haq, S., Kaushal, S. S., Duan, S. (2018) Episodic salinization and freshwater salinization syndrome mobilize base cations, carbon, and nutrients to streams across urban regions. Biogeochemistry. 141 463-486. DOI: 10.1007/s10533-018-0514-2

Kaushal, S.S., Likens, G.E., Pace, M.L., Haq, S., Wood, K.L., Galella, J.G., Morel, C., Doody, T.R.,Wessel, B., Kortelainen, P., Räike, A., Skinner, V., Utz, R., Jaworski, N. (2018) Novel 'chemical cocktails' in inland waters are a consequence of the freshwater salinization syndrome. Philosophical Transactions of the Royal Society B. 374(1764) DOI: 10.1098/rstb.2018.0017