Abstract
Rapid profiling instrumentation is used to resolve spatial patterns of temperature (T), specific conductance (SC), chlorophyll (Chl) and beam attenuation (c660), in three dimensional space for three water supply reservoirs (Pepacton, Rondout and Ashokan) located in New York State, U.S.A. Conspicuous patterns depict the operation of important processes that include the development of deep chlorophyll maxima, the entry of major tributary and tunnel inflows as interflows, and the development of benthic nepheloid layers. SC is demonstrated to be a valuable tracer of the interflow process in these reservoirs. Distinct longitudinal structures are documented for T in spring, SC, Chl and c660, along the major axes of Pepacton, Rondout, and one of the two (separated) basins of Ashokan. Substantial differences are demonstrated to prevail between the two basins of Ashokan; treatment as two basins in series is recommended for modeling purposes. Three-dimensional structures in SC and c660, apparently imparted from interflows, are documented for one of the basins of this impoundment. The needs of mechanistic model frameworks to accommodate the observed spatial patterns and processes are considered.
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