Status Report on Bottom-Tracking ADCPs _ ADPs by wpr1947

VIEWS: 54 PAGES: 36

									Status Report on
Bottom-Tracking
ADCPs & ADPs
       David S. Mueller
    Office of Surface Water
       Topics for Presentation
   ADCP & ADP Usage
   Benefits
   Applications
   QA/QC Efforts
   New Developments
      Profilers in the USGS


                    10
               15
                          165 River Profilers =
                              $4,100,000



RD Instruments
Sontek ADP
Nortek BoogieDopp
                         165
                   Benefits
   Measures Profiles in the whole cross section
   Doesn’t assume log velocity profile
   Handles bidirectional flows
                    Benefits
   Less time and equipment on bridges
   No lines in the water (debris risk reduced)
   Multiple deployment options
Typical Deployment Methods
Tethered from Cableway
Maine’s Bank Operated Cableway
Alaska’s Seaplane
Maine’s Canoe Deployment
Remote Control Boat Demo
SFWMD Remote Boat
      OceanScience R/C Boat




Available Now
Max. Vel. 5.5 fps
               Applications

   Measure Flow Distribution
   Evaluate Aquatic Habitat
   Calibrate and Validate Numerical Models
   Visualize Flow Fields
   Qualitatively Assess Suspended Sediments
                         Flow Distribution
                  CROS -S ECTION AT CUMBERLAND        (RM3 1 .0
                 CROS SS -S ECTIONAT CUMBERLAND RIVER (RM3 1 .0 ))

                 LEW
                  LEW                                                                       REW
                                                                                            REW
         350
           350


         340
           340
ELEVATION (FT)
ELEVATION (FT)




                                       Ve lo city
                                        Ve lo city
         330
           330                         (ft/s eec)
                                        (ft/s c)
                                                     BARKLEY
                                                     BARKLEY LAKE
                                               0.6
                                              0.6
                                               0.5
                                              0.5
                                               0.4
                                              0.4
                                                     Conto
                                                     Co nto ur plo t o f the
                                                                           the
                                                     cro s s
                                                     cro s s -s e ctio nal ve lo citie s in
                                                                           ve lo citie s in
           320
         320                                   0.3
                                              0.3    the do
                                                     the do wns tre am dire ctio n (only)
                                                                            dire ctio n (only)
                                               0.2
                                              0.2
                                               0.1
                                              0.1
                                               0.0
                                              0.0
                                                     Date
                                                     Date : No ve mbe r1 6 ,, 1 9 9 8
                                                                             6 1998
                                                     S tart
                                                     S tart Time : 1 5 17
                                                                       17
           310
         310                                  -0.1
                                             -0.1    End
                                                     End Time : 1 61 0
                                                                    61
                                              -0.2
                                             -0.2    Dis charg
                                                     Dis charg e : 1 4 ,6 0 0 cfs
                                                                            0 cfs
                                              -0.3
                                             -0.3    Wate
                                                     Wate r S urface Ele vatio n: 3 5 4 .5
                                                                        Ele vatio n: 3 5 4 .5

           300
         300


                    00       2000
                            2000       4000
                                      4000            6000
                                                      6000                     8000
                                                                               8000
                                    RANGE (FT)
                                    RANGE (FT)
Flow Field Measurements

                                      VELOCITY
                                      (FT/S EC)
                                            10
                                            9
 430000                                     8
                                            7
                                            6
                                            5
                                            4
                                            3
                                            2
                                            1
                                            0

 425000




 420000
          3.01E+06   3.015E+06   3.02E+06
Numerical Model Validation
                                                        1 ft/s



              324000




              323500
    Y-Coord




                                               Line 4




              323000




                       1031500   1032000   1032500
                                 X-Coord
Sacramento River at Delta Cross Channel
          Courtesy of Randal Dinehart, California District




Survey Grid
Flow Animation
Animation of Backscatter Changes
           QA/QC Efforts to Date
   Tow Tank Tests
       Marginal success due to limits of tow tanks
        Efforts to Date -- continued
   Discharge Comparisons
       Broadband tests: Morlock, 1996
       Rio Grande and RiverSurveyor tests: Mueller, 2003
           Parameter                      Rio Grande                   RiverSurveyor
           Frequency (kHz)        1,200                600          1,500          3,000
           Water Mode         1           5      1            5      N/A            N/A
           Bin Size (cm)     25           5      50          10      50              25
           Blank (cm)            25                  25              40              20
           Bottom Mode            5                   5              N/A            N/A
           Averaging         1 ping per          1 ping per       5-second       5-second
                               profile             profile         profiles       profiles
                                     Sample Data
                                              Kankakee River at Shelby, IN


                  1150




                  1100




                  1050
DISCHARGE (cfs)




                  1000




                   950




                   900                                                         RDI 1200 M1
                                                                               RDI 1200 M5
                                                                               RDI 600 M5
                                                                               Sontek 3 MHz
                   850                                                         Cup Meas. 1
                                                                               Cup Meas. 2
                                                                               Rating
                   800
                     10:48   12:00    13:12        14:24           15:36     16:48            18:00
                                                 TIME (EDT)
                   Variation in Rio Grande Meas.
                                     6
DEVIATION FROM MEAN OF ALL PASSES,




                                     5
                                     4
                                     3
                                     2
            IN PERCENT




                                     1
                                     0
                                     -1
                                     -2
                                     -3
                                     -4
                                     -5
                                          1.9   2.3    1.7    1.0    1.7     2.2    2.4      0.7    1.2     1.0     1.0
                                          1      2      3      1       2      3      4        1      2       1       2


                                            Kankakee R. at                                Missouri R. at Mississippi R. at
                                                              Kankakee R. at Shelby, IN   Hermann, MO
                                           Dunns Bridge, IN                                                 Chester, IL
Variation in RiverSurveyor Meas.
                                       12
  DEVIATION FROM MEAN OF ALL PASSES,




                                       10
                                        8
                                        6
                                        4
              IN PERCENT




                                        2
                                        0
                                       -2
                                       -4
                                       -6
                                       -8
                                       -10   4.1        3.9      3.8   3.7        5.6      5.0       5.4
                                             1           2        3     1          2        3            4


                                                    Kankakee R. at
                                                   Dunns Bridge, IN          Kankakee R. at Shelby, IN
Variation in Bottom Track and GPS
  DEVIATION FROM MEAN OF ALL PASSES, IN PERCENT

                                                        600 kHz Rio Grande
                                                   5




                                                   0




                                                   -5




                                                         0.7%   2.2% 1.2%        2.3%   1.0%   4.4%   1.0%    1.7%
                                                  -10
                                                          BT   GPS     BT    GPS        BT   GPS       BT    GPS
                                                           GROUP 1      GROUP 2          GROUP 1        GROUP 2

                                                                Missouri River                 Mississippi River
                                                                       SITE AND NAVIGATION REFERENCE
           Summary of Results
   On average, all acoustic measurements were
    with 5% of Price AA or rating
   Higher frequency units will detect a moving
    bottom more often and will require use of
    DGPS more frequently
   COV was lower for RDI instruments
   COV was higher when using DGPS
        Efforts to Date -- continued
   Velocity Comparisons
       Rio Grande: Gartner, 2002
                                                                          MEAN VELOCITY PROFILES, DELTA MENDOTA CANAL, 1/24/02
                                                                0




                           Distance Below Surface, in Meters
                                                               0.5
                                                                          ADCP 5 cm blank (11 cm)
                                                                          ADCP 10 cm blank (15 cm)
                                                                1
                                                                          ADCP 15 cm blank (21 cm)
                                                                          ADCP 20 cm blank (25 cm)

                  ADCP                                         1.5
                                                                          ADCP 25 cm blank (30 cm)
                                                                          ADV at 32 cm below surface
                                                                          ADV at 36 cm below surface
                                                                          ADV at 42 cm below surface
ADV
                                                                2
                                                                          ADV at 46 cm below surface
                                                                          ADV at 51 cm below surface
                                                               2.5        ADCP (sled boat) 15 cm blank (20 cm)
                                                                          ADV at 30 cm below surface
                                                                          ADV at 130 cm below surface
                                                                3
                                                                     90               95                    100     105               110   115
                                                                                           Mean Velocity, in Centemeters Per Second
        Current QA/QC Efforts
   Rio Grande Testing
     Water Mode 11
     Water Mode 12

     Bottom Mode 7

   RiverSurveyor Testing
     New Software
     Shallow-Water Ping

     Bottom-Track Algorithms
          Current QA/QC Efforts
   Flow Disturbance
                                                   Simple cylinder
          Velocity Magnitude in ft/sec
    4.0             4.1                  4.2   

                                                  Fully-developed flow
                                                  Approach velocity = 4
                                                   ft/s
                                                  Flow is from right to
                                                   left with a y-axis
                                                   cutting plane at
                                                   approximately the
                                                   center of the cylinder.
        Current QA/QC Efforts
   GPS Evaluation




   StreamPro Evaluation
        Current QA/QC Efforts
   Number of Passes
          DEVIATION FROM MEAN OF ALL PASSES, IN PERCENT




                                                                                           RD INSTRUMENTS
                                                          10
                                                                                               SONTEK


                                                           5



                                                           0



                                                           -5



                                                          -10

                                                                1   2         4            6            8
                                                                        NUMBER OF PASSES
             Future Developments
   Phased Array
    Technology
       2.8 inches in diameter
       58 x 58 elements
       Replaces 4 individual
        ceramics
       Still in development
            Next Generation ADCP
   Dual Frequency
    Operation – For shallow
    & deep rivers:
       600 kHz for accurate bottom
        tracking & deep water
        profiling
       2400 kHz for high resolution
        shallow water profiling

   Flat face for minimum                Depth       Bin size            Frequency
                                       0.3–0.6 m      5 cm                2.4 MHz
    flow disturbance                    0.6–2 m       10 cm               2.4 MHz
                                        2–50 m     10 cm (? 2 m)   Interleave 2.4 MHz &
   5” X 5” cylinder                               40 cm (> 2 m)          600 kHz
    Next Generation Field Vehicle
   Great morale builder
   Great recruiting tool
   No need to maintain
    boats
   Built-in ADCP and
    computer
?

								
To top