presented at modeling subcommittee july 18, 2006

Preliminary Assessment of Sediment Observations from the Shallow Stations and the Mid-Channel StationsPresented at Modeling SubcommitteeJuly 18, 2006

What is the relationship between the shallow water turbidity observations and related observations from adjacent channel stations?- Does one reflect the other in any way? With what consistency? Can one predict one with the other?- What is the relationship between turbidity and TSS?- Do the Data Flow cruises go out to the channel stations and if so, what does that tell us about the relationship of the shallow and channel monitoring? If Data Flow doesn't go to the channel stations, should it?Does it ever cross from one side of a broad river, e.g., the Potomac, to the other and what can that tell us about the shallow/channel differences?

Can one shallow water monitoring station's continuous turbidity observations as well as other observations be related to adjacent sites, or are they entirely independent?

Are the shallow water monitoring stations effected by high TSS loads from the fall line?- With what frequency does this happen?- How far down estuary does the fall line influence go? To the oligohaline? To the lower estuary?- What is the frequency of fall line effects for different stations in the Tidal Fresh Potomac for example?

Can we relate wind speed and direction to turbidity?- If a stiff wind is blowing in a Chesapeake tributary do we consistently see high turbidity on the leeward shore?- Does this effect all stations on the leeward shore?- Do the windward shore shallow water monitoring sites have relatively less suspended sediment under the same conditions?

Review of Previous Work127 shallow, 54 midChannel (13 tribs)

Secchi depth, DIN, Chl-a.

Statistics: Wilcoxon paired-sample; relation plots.

~2 km distance for midChannel to characterize nearshore conditions. -- by MDDNR (Karrh; )

Mid Channel Stations: TSS (biweekly).

Shallow stations: Turb (15 minutes interval).

Precipitation, Wind speed, fall-line flow.

MTI0015:- MataponiXDE4587 - Pin OakPXT0455 Jug BayXED0694 - BenedictXCF9029 CBLWXT0013 Iron PotPAT0311 Kings LandingXBE8396:- PineyPointXBF0231:- FenwickXBF6843:- SagePointXEA3687 MwomanXFB2184 - PiscatawayRET1.1RET2.2RET2.4TF2.1TF1.0

Iorn Point

Jug Bay

Mataponi

Pin Oak

Iorn Point

Jug Bay

Mataponi

Pin Oak

Iorn Point

Jug Bay

Mataponi

Pin Oak

Lower layer of Mid-channel is effected mainly by upstream flow-load, and tide cycles.

The upper layer of Mid-Channel may have certain correlation with nearby shallow stations.

Tide, precipitation, and wind have certain effects on TSS.

Preliminary findings

Future WorkFurther collect data (more).

Data analysis: graphical analysis.

Statistics: Ranking Method (Wilcoxon, Spearman) , Cluster analysis ( -- needs more parameters), correlation analysis.

Tracer analysis: Dye test, Isotope tracer, tracer modeling.

AcknowledgementsBruce Michael and other DNR colleagues (providing shallow water monitoring data).

Mary Ellen Ley (providing shallow water and mid-channel monitoring information).

AcknowledgementsBruce Michael and other DNR colleagues (providing shallow water monitoring data).

Mary Ellen Ley (providing shallow water and mid-channel monitoring information).

Rich Batiuk and Lewis Linker (Coordinates and supports).

Thank [email protected]

Statistics: .

Compare Shallow stations:

Tracer experiments: dye test, isotope.

Future Work

presented at modeling subcommittee july 18, 2006

Documents

shallow stations

adjacent channel stations

different stations

channel monitoring

jug baymti0015

pin oakmti0015

related observations

high turbidity