Sediment Erosion Characteristics at the Potomac River Jerome P.-Y. maa Virginia Institute of Marine Science College of William and Mary.

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Presentation transcript:

Sediment Erosion Characteristics at the Potomac River Jerome P.-Y. maa Virginia Institute of Marine Science College of William and Mary

Douglas Pt Maryland Pt Gunston Cove Three experimental sites in 2005

Maryland Pt.

Douglas Pt

Two experimental sites at Gunston Cove in 2004, only select one in 2005

A sediment sample from Gunston Cove site on Virginia side

APPRXIMATED EXCESS BED SHEAR STRESS (Pa) BED SHEAR STRESS (Pa) (s -1 ) EROSION RATE (g/cm 2 /s) Gunston Cove (Aug., 04) Virginia Side Maryland Side

VIMS sea Carousel

OBS Output (v) TSS Conc. (mg/L) C = v * v * v 3 Fig. XX. Calibration curve for converting the OBS readings to suspended sediment concentrations. Plus signs are from Douglas Point site, diamonds are from Maryland Point site and circles are from Gunston Cove site.

Shear Stress (Pa) Time (min) TSS (mg/L) Maryland Point Incipient test Sept. 13, 2005  cr = 0.05 Pa

Shear Stress (Pa) Time (min) TSS (mg/L) Douglas Point Incipient test Sept. 12, 2005  cr = Pa

Shear Stress (Pa) Time (min) TSS (mg/L) Gunston Cove Incipient test Sept. 14, 2005  cr = 0.13 Pa

Time (min) Shear Stress (Pa) TSS (g/L) Douglas Point Erosion rate test

Shear Stress (Pa) Time (min) TSS (g/L) Maryland Point Erosion rate test

Time (min) TSS (g/L) Shear Stress (Pa) Gunston Cove Erosion rate test

APPRXIMATED EXCESS BED SHEAR STRESS (Pa) BED SHEAR STRESS (Pa) (s -1 ) EROSION RATE (g/cm 2 /s) Gunston Cove (Sept. 05) Douglas Pt and Maryland Pt Gunston Cove (Aug., 04)

APPRXIMATED EXCESS BED SHEAR STRESS (Pa) BED SHEAR STRESS (Pa) (s -1 ) EROSION RATE (g/cm 2 /s) Gunston Cove (Aug., 04) Virginia Side Maryland Side

Thanks