Time-series stream temperature and dissolved oxygen modeling in the Lower Flint River Basin
Jackson, C. Rhett
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In the Lower Flint River Basin (LFRB), ex- cessive groundwater withdrawals and possible water supply reservoirs threaten to exacerbate low ow conditions during summer droughts, possibly leading stream temperature and dissolved oxygen (DO) levels detrimental to aquatic biota. To evaluate possible effects of human modi cations to stream habitat, summer time-series of stream temperature and DO were monitored over the last three years along these streams. Continuously Stirred Tank Reactor (CSTR) models for tem- perature and DO were developed and calibrated with these data. The dominant drivers of stream temperature and DO were identi ed by this model. Simulations were conducted with assumed managed ow conditions to illustrate potential effects of various stream ow regimes on stream temperature and DO time-series. The goal of this research is to provide an accurate simulation tool to guide management decisions.