Currituck Sound, located in the northeast corner of North Carolina, consists of about 150 square miles of shallow estuary fed by hundreds of miles of channels, rivers and tributaries draining nearly 700 square miles of North Carolina and southeast Virginia. Of current concern and focus is the potential for negative impact on the water quality of the system from the flows coming into the Sound from the highly developed Virginia Beach area. The focus of the study is to investigate the potential for significant transport, using salinity as a conservative tracer, between Lynnhaven Bay and the North Landing River. The geographic scope is defined as the North Landing River area, extending from Lynnhaven Bay through London Bridge Creek and West Neck Creek to the mouth of the North Landing River. The objective of the project is to develop, calibrate and verify a computer model which can be used to determine under which conditions transport is achieved along the 23 miles from Lynnhaven Bay to Currituck Sound.