FIELD MEASUREMENTS OF BULK FLOW AND TRANSPORT THROUGH A SMALL COASTAL EMBAYMENT HAVING VARIABLE DISTRIBUTIONS OF AQUATIC VEGETATION

This thesis is largely the documentation of two passive tracer release studies per-formed in Sterling Pond (SP), a small embayment on the southern coast of Lake Ontario (LO). SP has a large watershed and is strongly connected to LO by a long and narrow channel. The experiments were designed to decipher the effects of aquatic vegetation (macrophytes) on flow and transport through SP and through shallow embayments dominated by macrophytes in general. Towards this objec-tive, the studies captured the residence time distribution (RTD) of water entering SP from its watershed under two different spatial distributions of macrophytes, and they were conducted in synchrony with extensive surveys of macrophyte density, height, and species composition. Variables relevant to the dynamics of SP were continuously monitored at its boundaries, including meteorological conditions, wa-ter surface elevation, flow, and temperature (temperature was continuously mon-itored within SP as well); bathymetric data was collected once. The first study took place when watershed flow was high and macrophytes were sparse – mean res