TIDE 2005 Sediment and Geomorphology Update by yurtgc548

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									            TIDE 2005
Sediment and Geomorphology Update




    Lynsey E. LeMay & Carl T. Friedrichs
                2005 Recap
•   Sediment plates (all creeks, SW d/no-d)
•   TSS/FSS (all creeks)
•   Tide Sticks (all creeks)
•   Pb-210 / Cs-137 (SW, in ditch, TSS, SP)
•   ADV (SW)
•   ADCP (all creeks, SW twice)
•   Sweeney Flooding Pattern
                                Ditch/No-ditch
                                2005 All Creek sites With Elevations > 4m

                           15
cm above creekbank datum




                           10




                            5




                            0

                                DITCH                         NO DITCH
        BUT…
What about the treatments?

 Are there treatment affects on the
  sediment and geomorphology?
                                     FSS (mg/L)

          Sweeney                    West            Club Head                Nelson
           L          R          L          R          L          R          L          R
       10.700     13.0467    15.6133 16.6692       18.9231 13.9062       12.4750 11.9556
2003 +/- 1.1587   +/- 1.1392 +/- 1.0463 +/- 1.7571 +/- 1.6973 +/- 1.5414 +/- 2.2861 +/- 0.8665

       11.9570    12.0076    15.5333 8.4000        10.2313 18.1767       10.4000 12.1307
2004 +/- 0.9603   +/- 0.9239 +/- 2.9917 +/- 1.0060 +/- 0.5912 +/- 2.4243 +/- 1.2835 +/- 1.5821

       15.1201    10.8813    15.4419 11.9082       9.9790     14.5967    15.5057 11.1159
2005   +/- 3.1310 +/- 1.2605 +/- 3.5267 +/- 1.6610 +/- 1.1413 +/- 3.0909 +/- 2.7781 +/- 1.9857
                                          FSS (mg/L)
25                                   25                                   25



20                                   20                                   20



15                                   15                                   15



10                                   10                                   10       TextEnd




5                                    5                                    5



0                                    0    L   R   L   R   L   R   L   R   0    L    R        L   R   L   R   L   R
     L   R   L   R   L   R   L   R
     SW WE           CL      NE           SW WE           CL      NE           SW WE                 CL      NE

             2003                                 2004                                           2005
                       Sediment Deposition
                       (mg/cm2/week)
           Sweeney                   West              Club Head              Nelson
           L          R          L          R           L         R          L          R
       0.3169     0.5321     0.3780     0.4253     1.7114     1.4807     1.2143     0.9414
2003   +/- 0.1435 +/- 0.1540 +/- 0.1186 +/- 0.1968 +/- 0.1651 +/- 0.1468 +/- 0.1729 +/- 0.1366

       2.8114     3.7392     1.3421     1.4199     1.5997     2.6204     0.7708     0.6587
2004   +/- 0.7115 +/- 1.0743 +/- 0.3661 +/- 0.3155 +/- 0.4392 +/- 0.5740 +/- 0.0858 +/- 0.0982

                             2.7061     1.5805
2005   -          -
                             +/- 1.1967 +/- 0.3179
                                                   -          -          -          -
                                        Sediment Deposition
                                        (mg/cm2/week)
               2                                     5

              1.8                                    4.5

              1.6                                    4

              1.4                                    3.5
mg/cm2/week




              1.2                                    3

               1                                     2.5

              0.8                                    2

              0.6                                    1.5

              0.4                                    1

              0.2                                    0.5

                0                                    0
                    L   R   L   R   L    R   L   R         L   R   L   R   L    R   L   R
                    SW      WE      CL       NE            SW      WE      CL       NE
                                2003                                   2004
So…about those treatments?

  Well, doesn’t appear to be treatment
effects. Maybe disturbance effects from
 marsh trampling or toupee effect…….
 Or sampling problems in 1st year……
                                     Sweeney 2004 Sed Plates
                                           Deposition vs. Elevation

                            45

                            40
Elevation (cm above mllw)




                            35

                            30

                            25

                            20

                            15

                            10

                            5

                            0
                                 0     5      10          15          20       25   30
                                           Sediment Deposition (mg/cm2/week)
                       Grain Size
              Average Grain Size - L and R Branches

100%

90%

80%

70%

60%
                                                                clay
50%                                                             silt
                                                                sand
40%

30%

20%

10%

 0%
       SW L    SW R   WE L   WE R   CL L   CL R   NE L   NE R
                     Grain Size
        Average Grain Size with Distance Along
                      Transect

100%

80%
                                                       C lay
60%
                                                       Silt
40%                                                    Sand

20%

 0%
       SW SW SW SW WE WE WE C L C L C L C L NE NE NE
        4 10 20 50 4 20 50 4 10 20 50 4 20 50
    Sweeney Flooding Pattern
• Grid system
• 92 stations
• Water height measurement taken
  continuously through flood and ebb
0 min
10 min
20 min
30 min
40 min
50 min
60 min
70 min
100 min
110 min
120 min
130 min
140 min
             What’s Next?
• Normalize sediment deposition data by the
  length of time submerged
• ADV data analysis
• ADCP data analysis - Katie Luciano
• Compare our elevations with LIDAR
                                                                        Ž     ŽQ
Predicting Water Flux Along Creeks Using Mass conservation:         b      = 
                                                                        Žt     Žx
                                                                change in       transport
                                                                sea level     convergence




                                                                        Q
                                              x



              b = instantaneous basin width, Q = along-channel water flux,
                         positive x toward ebb,  = tidal elevation

  In SHORT tidal basins: -- Tidal elevation, , is nearly uniform over flooded area

                       Ž                 Ž         d
                          (x,t)            (t) =
                       Žt                Žt        dt
                                                                          d     ŽQ
Predicting Water Flux Along Creeks Using Mass conservation:           b      = 
                                                                          dt     Žx



                        x=0



                                                                           Q(L)
                                                           x=L
                                                       L                    L
   Solution:                                                 d                 ŽQ
                                                           b    dx =              dx
   Integrate mass conservation in x                          dt                 Žx
                                                   0                        0
   from x = 0 to sampling location x = L:          L                              0
                                              d
                                                       b dx =  ( Q(L)  Q (0) )
                                              dt
                                                   0

                                                           AL(t) = surface area landward of L
                                             d
Solve for water flux:    Q L(t) =  A L(t)         ~ Surface area times elevation change
                                             dt
                                                    d
Solve for water flux:           Q L(t) =  A L(t)           ~ Surface area times elevation change
                                                    dt

        So we need to know basin area AL , as a function of tidal height, 
                                (A unique function good for every tidal cycle.)
                   10 5

                                                                         Least-squares log fit:

  West Creek
                   10 4
                                                                    A=exp(a1*^3+a2*^2+a3*+a4)
   Estimated
  Basin Area                                                                  for  < 3.5
 AL = QL/(d/dt)
      (m2)                                                             A=6.5352e+04 for  ≥ 3.5
                        3
                   10


                                                                        a1=0.66243 a2=-3.7695
                                                                        a3=7.4953 a4=2.6288
                   10 2
                            0        1       2        3       4


                                     Yacht Club Tide (m)


                    Blue = June 1 ‘05, Green = June 22 ‘05
                          Red = Least-squares log fit
 Predicted flux
Q = AL() (d/dt)
     (m3/s)
               10 6
                                                                                                    1
                                                                                               10
                            Blue = EMCM June 21 ‘05                                                        Predicted flux
                            Green = EMCM July 7 ‘05                                                       Q = AL() (d/dt)
                                                                                                               (m3/s)




                                                                       Predicted Flux (m3/s)
                    5
               10             Red = ADCP July 7 ‘05
  Sweeney
    Creek
                 4
  Estimated 10                                                                                 10
                                                                                                    0

 Basin Area
AL = QL/(d/dt)
     (m2)     10
                 3

                                                                                                                     Blue = EMCM June 21,
                                                                                                                      Green = EMCM July 7
                                                                                                                       Red = ADCP July 7
               10 2                                                                            10 -1
                        1      1.5      2       2.5      3       3.5                              10 -1               10 0            10 1

                                     Tide height (m)                                                           Observed Flux (m3/s)
                            (Frank for x’s,Yacht Club for o’s)

								
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