2-Dimensional Tidal Dispersion Coefficients and Total Suspended Solids Flux Characterization in the James River

Track 3B: Monitoring and Managing Pollution from the Urban Environment
Thursday, October 12, 2017, 3:40 pm – 5:10 pm

Jaewan Yoon
Associate Professor and University Professor
Department of Civil and Environmental Engineering
Old Dominion University
Norfolk, VA 23529

The longitudinal and lateral dispersion coefficients are parameters used to evaluate the effect of cross-sectional variations on substance mixing mechanisms in estuaries influenced by tide, wind and internal density variations. Study aims at evaluating a tidal mixing of the lower James River at approximately 19 miles upstream from the mouth at the Chesapeake Bay, in the City of Newport News where receives a discharge from the HRSD James River Wastewater Treatment Plant. Two dimensional dispersion coefficients were estimated and used to further characterize Total Suspended Solids flux and transport mechanisms in the surrounding area based on Control Volume/Steady State Response Matrix method among eight segments in the study area. Additional General Linear Model method was used to develop an in-situ correlationship between Turbidity and Total Suspended Solids from historical HRSD James River plant data series. The results suggest that in the study area of the James River, dispersive mechanisms of Flood cycles influence the transport of TSS towards the upstream, reducing the effect of advective movement from the Warwick River towards the lower reach of the James River.