Presented at Modeling Subcommittee July 18, 2006

1. Preliminary Assessment of Sediment Observations from the Shallow Stations and the Mid-Channel Stations Presented at Modeling Subcommittee July 18, 2006

2. 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?

3. Review of Previous Work -- by MDDNR (Karrh; ) • 127 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.

4. Mid Channel Stations: TSS (biweekly). • Shallow stations: Turb (15 minutes interval). • Precipitation, Wind speed, fall-line flow.

5. TF1.0 WXT0013 – Iron Pot XFB2184 - Piscataway PXT0455 – Jug Bay TF2.1 MTI0015:- Mataponi XEA3687 – M’woman RET1.1 XDE4587 - Pin Oak RET2.2 RET2.4 XBF6843:- SagePoint XBE8396:- PineyPoint XBF0231:- Fenwick PAT0311 – King’s Landing XED0694 - Benedict XCF9029 – CBL

9. TF1.0 WXT0013 – Iron Pot XFB2184 - Piscataway PXT0455 – Jug Bay TF2.1 MTI0015:- Mataponi XEA3687 – M’woman RET1.1 XDE4587 - Pin Oak RET2.2 RET2.4 XBF6843:- SagePoint XBE8396:- PineyPoint XBF0231:- Fenwick PAT0311 – King’s Landing XED0694 - Benedict XCF9029 – CBL

10. Iorn Point

15. TF1.0 WXT0013 – Iron Pot XFB2184 - Piscataway PXT0455 – Jug Bay TF2.1 MTI0015:- Mataponi XEA3687 – M’woman RET1.1 XDE4587 - Pin Oak RET2.2 RET2.4 XBF6843:- SagePoint XBE8396:- PineyPoint XBF0231:- Fenwick PAT0311 – King’s Landing XED0694 - Benedict XCF9029 – CBL

16. Jug Bay

21. TF1.0 WXT0013 – Iron Pot XFB2184 - Piscataway PXT0455 – Jug Bay TF2.1 MTI0015:- Mataponi XEA3687 – M’woman RET1.1 XDE4587 - Pin Oak RET2.2 RET2.4 XBF6843:- SagePoint XBE8396:- PineyPoint XBF0231:- Fenwick PAT0311 – King’s Landing XED0694 - Benedict XCF9029 – CBL

22. Mataponi

29. TF1.0 WXT0013 – Iron Pot XFB2184 - Piscataway PXT0455 – Jug Bay TF2.1 MTI0015:- Mataponi XEA3687 – M’woman RET1.1 XDE4587 - Pin Oak RET2.2 RET2.4 XBF6843:- SagePoint XBE8396:- PineyPoint XBF0231:- Fenwick PAT0311 – King’s Landing XED0694 - Benedict XCF9029 – CBL

30. Pin Oak

36. TF1.0 WXT0013 – Iron Pot XFB2184 - Piscataway PXT0455 – Jug Bay TF2.1 MTI0015:- Mataponi XEA3687 – M’woman RET1.1 XDE4587 - Pin Oak RET2.2 RET2.4 XBF6843:- SagePoint XBE8396:- PineyPoint XBF0231:- Fenwick PAT0311 – King’s Landing XED0694 - Benedict XCF9029 – CBL

42. TF1.0 WXT0013 – Iron Pot XFB2184 - Piscataway PXT0455 – Jug Bay TF2.1 MTI0015:- Mataponi XEA3687 – M’woman RET1.1 XDE4587 - Pin Oak RET2.2 RET2.4 XBF6843:- SagePoint XBE8396:- PineyPoint XBF0231:- Fenwick PAT0311 – King’s Landing XED0694 - Benedict XCF9029 – CBL

43. Iorn Point

44. Jug Bay

45. Mataponi

46. Pin Oak

48. Iorn Point

49. Jug Bay

50. Mataponi