PUBLICATIONS--New parameter codes for bedload data


In Reply Refer To:                         February 24, 1992
Mail Stop 415




OFFICE OF SURFACE WATER TECHNICAL MEMORANDUM NO. 92.06

Subject:  PUBLICATIONS--New parameter codes for bedload data

The purpose of the Office of Surface Water Technical Memorandum 
No. 90.08 was to set the policy and guidelines for the 
collection and publication of bedload data.

The policy and guidelines require that all bedload data, to be 
stored in WATSTORE and published in the annual data reports, be 
qualified by storing with each sample data set the mandatory 
information identified in Table 1.  Six of the items in Table 1 
did not have parameter codes.  They had been applied for but 
only recently obtained.

The parameter codes have now been received and an updated 
Table 1 is attached.  Please insert the new Table 1 with OSW 
Memorandum 90.08.  The new parameter codes are given in bold 
print.




                                  Charles W. Boning
                                  Chief, Office of Surface Water

Attachments

WRD DISTRIBUTION:  A, B, FO, PO

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Table 1.  Mandatory and Optional Data to be Stored with
          Bedload Samples

Mandatory data

Parameter Code        Description

 ---            (1)   Date (begin date, end date)
 ---            (2)   Time of composite (begin time, end time)
 ---                  Hydrologic condition code
 ---                  Remarks
82073                 Start Time, of measurement
82074                 End Time, of measurement
00061                 Instantaneous stream discharge (cfs)
80225           (3)   Bedload discharge total section (tons/day)
04118           (4)   Composites in section discharge (count)
                        Short name - Number of Composites
04122           (5)   Bedload transport rate, unit (tons/day/ft)
                        Short name - Bedload transport rate
00063           (6)   Number of samples in composite (count)
04119           (7)   Number of verticals in composite
                        Short name - Number of verticals
00009           (8)   Cross-section location feet from left 
                        bank(ft)
                      (Vertical in composite closest to the
                        left bank)
04121           (9)   Width increment of samples in composite (ft)
                        Short name - width increment of sample
04120          (10)   Sampling time of each bedload sample (sec)
                        Short name - Sampling time of sample
84164                 Type of sampler (see Table 2)
82398                 Sampling methodology (see Table 2)
30333                 Bedload sampler bag mesh size (mm)
04117          (11)   Tetherline (0=no, 1=yes)
                        Short name - Tetherline (0=no, 1=yes)
80226-80238    (12)   Bedload particle size distribution
80154                 Suspended sediment concentration
70331-70347    (12)   Suspended sediment particle-size
                        distribution
80157-80175    (12)   Bed material particle-size distribution
00010                 Stream temperature (deg C)

1Enter the "Date of measurement" which may be composed of one or more composite samples.  If the measurement spans two or more days enter the date the measurement was started.

2A composite is a sample of bedload material which is bagged for 
analysis.  A composite sample may contain one or more individual 
samples.  An individual sample is the material collected while the 
sampler is on the bed for one sample time.  The "Time of composite" should begin at the time of the collection of the first individual sample in the composite and end with the time of completion of the last individual sample in the composite.  The time must be unique for each composite.

3The "Bedload discharge total section" is the total cross sectional bedload discharge as expressed in tons per day.

4The "Composites in section discharge" is the number of composited 
samples (one or more) making up the total cross sectional measurement.

5The "Bedload transport rate" is the average unit bedload discharge for the samples in the composite expressed in tons per day per foot of width.

6A composite sample may contain one or more individual samples 
obtained at one or more verticals.  The "Number of samples in 
composite" is the total number of individual samples combined in the composite sample.

7The "Number of verticals in composite" is the number of verticals, one or more, represented in the composite sample.

8The composite sample may contain individual samples from several 
verticals.  The "Cross-section location" should represent the distance from the left bank to the closest vertical included in the composite.  Only contiguous verticals may be composited.

9The "Width increment of samples in composite" is the horizontal width of river represented by each vertical in the composite.  Only verticals with equal width increments may be composited.

10The "Sampling time of each bedload sample" is the actual time in 
seconds that the sampler rests on the bed for each individual sample.  Only samples with equal sampling times may be composited.

11The code "Tetherline" will indicate whether or not a tetherline was used for collecting the samples in the composite.

12It is not necessary to run a size analysis for every composite 
sample, but enough analyses should be performed to accurately define these parameters for all seasons and flow conditions in which bedload samples are to be collected at the site.

Table 2.  Values for selected Parameter Codes

Sampling methodology, Code 82398

Value          Description

1000.00        SEWI, Single Equal Width Increment method
1010.00        MEWI, Multiple Equal Width Increment method
1020.00        UWI, Unequal Width Increment method
  30.00        Single vertical 


Type of sampler, Code 84164

Value          Description

1100           3" by 3" Helley-Smith, 1/4-inch thick nozzle and
                tail, Weight (50 to 100 pounds), cable suspended,
                Expansion ratio 3.22.
1110           3" by 3" Helley-Smith, 1/4-inch thick nozzle and
                tail, Weight (100-200 pounds), cable suspended,
                Expansion ratio 3.22.
1120           3" by 3" Helley-Smith, 1/4-inch thick nozzle,
                no tail, wading rod suspended, 
                Expansion ratio 3.22.
1130           3" by 3" Helley-Smith, 16-gage nozzle, no tail,
                wading rod suspended, Expansion ratio 3.22.
1140           3" by 3" FIASP, 1/4-inch thick nozzle and tail,
                Weight (50-100 pounds), cable suspended, 
                Expansion ratio 1.40.
1150           3" by 3" FIASP, 1/4-inch thick nozzle, no tail,
                wading rod suspended, Expansion ratio 1.40.
1160           3" by 3" FIASP, 16-gage nozzle, no tail,
                wading rod suspended, Expansion ratio 1.40.
1170           6" by 6" Helley-Smith, 1/4-inch thick nozzle and
                tail, Weight (150-200 pounds), cable suspended,
                Expansion ratio 3.22.
1080           12" by 6" Hubbell #5, 1/4-inch plate nozzle and
                tail, Weight 100-150 pounds, cable suspended,
                Expansion ratio 1.40.
1050           6" by 12" Toutle River type 2, 1/4-inch plate
                nozzle and tail, Weight (100-200) pounds, 
                cable suspended, Expansion ratio 1.40.