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
*********************************************
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.