Title & OutlineDevelopment of a Sediment Transport Model for the

Chesapeake Bay:

Supporting Physical Data from VIMS Potomac River Intensive Surveys with Emphasis on LISST

Suspended Particle Size

Grace M. Cartwright and Carl T. FriedrichsVirginia Institute of Marine Science

OUTLINE:

1. Draft Data Report

2. Preliminary Trends from Particle Size Analysis

Report cover

Station locations

General station locations along

Potomac

Table 1

Transects map

Lateral ADCP/profiler transect locations

ADCP, Proflier ADCP

LISST

2 OBS

CTD

ADV

Pump

Profile & OBSsTypical profile

Calibration:TSS vs. OBS

ABS & Heidi

Large volume pump sampling for laboratory grain size analysis

Calibration:TSS vs. ABS

Bottom samplingBed grab with

1 cm interval

subsamples

of top 5 cm:

% water

organic matter

sand/silt/clay

Eh profile

Transects

LISST D50

profiles

CTDsalinity profiles

ADCP velocitytransect

ADCP conc

transect

Data sheet

Title & OutlineDevelopment of a Sediment Transport Model for the

Chesapeake Bay:

Supporting Physical Data from VIMS Potomac River Intensive Surveys with Emphasis on LISST

Suspended Particle Size

Grace M. Cartwright and Carl T. FriedrichsVirginia Institute of Marine Science

OUTLINE:

1. Draft Data Report

2. Preliminary Trends from Particle Size Analysis

Along axis

UMCES Data: D50 depends on location, elevation and TSS.Two distinct populations indicated: (i) suspended, (ii) flocculated

Size vs. TSS

101 102101

102

Pump TSS (mg/l) (o 2004, x 2005)

D84(m)

D16(m)

D50(m)

Two populations at low C; Spectrum more peaked at high C

Inorganic

101 1020

10

20

30

40

50

60

70

80

90

100

%Inorganic

Pump TSS (mg/l) (o 2004, x 2005)

Two populations: (i) highly inorganic, (ii) organic/inorganic mixture

TSS vs. speed

0 10 20 30 40 50 60

101

102

TSS vs. Speed

PumpTSS

(mg/l)

Current speed (cm/s) (o 2004, x 2005)

TSS vs. sp, z<1

0 10 20 30 40 50 60

101

102

Nearbed TSS vs Speed

PumpTSS

(mg/l)

Current speed (cm/s) (o 2004, x 2005)

Height above bed

< 1 m

PCs

0 10 20 300

0.5

1

1.5

2

2.5

3

3.5

4

0 10 20 300

0.5

1

1.5

2

2.5

3

3.5

4

0 10 20 300

1

2

3

4

5

-2 0 2 4101

102

-4 -2 0 2101

102

-5 0 5101

102

D84(m)

D16(m)

D50(m)

Principal Component Weighting

Nor

mal

ized

Vol

. C

onc.

Size category (5 to 500 m)

Mean profiles shapes for cases with PC weightings > 2 or < -2

PC1PC2

PC3

PC1 (84.4%) PC2 (8.0%) PC3 (5.7%)

Principal Component Analysis of Particle Size Spectra:

Title & OutlineDevelopment of a Sediment Transport Model for the

Chesapeake Bay:

Supporting Physical Data from VIMS Potomac River Intensive Surveys with Emphasis on LISST

Suspended Particle Size

Grace M. Cartwright and Carl T. FriedrichsVirginia Institute of Marine Science

OUTLINE:

1. Draft Data Report

2. Preliminary Trends from Particle Size Analysis