The composition of the streambed and streambank are an important facet of stream character, influencing channel form and hydraulics, erosion rates, sediment supply, and other characteristics (Rosgen, 1994). A quantitative description of the size of the coarse streambed material was obtained at all fixed sites using the Wolman Pebble Count (Wolman, 1954) technique. Stream bed and bank cores were sieved by the USGS Iowa City, Iowa Sediment Laboratory. Particle sizes are tallied by using Wentworth size classes in which the size doubles with each class (2,4,8,16,32 mm.). A minimum of 50 attempts were made at three transects to obtain a Wolman Pebble Count. Streambed and streambank core samples were collected at the same three transects and the composite results are found below.
Percent size and type of coarse material found on the streambed
by Wolman Pebble Count Method (size in millimeters)
% Boulders % Cobbles % Pebbles % Gravel
---------- --------- --------- -------------------
<=256 <=128 <=64 <=32 <=16 <=8 <=4
and and and and and and and
STATION >256 >128 >64 >32 >16 >8 >4 >2
NUMBER STATION NAME Date (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm)
04159492 BLACK R. NEAR JEDDO, MI 07/07/97 0 10.7 45.0 24.2 6.7 8.3 4.2 0.8
04161820 CLINTON R. AT STERLING HEIGHTS, MI 07/30/97 0 0 0 0.8 42.7 51.0 5.5 0
04175600 RIVER RAISIN NEAR MANCHESTER, MI 07/31/97 0 0.7 7.8 21.7 36.4 27.9 5.5 0
04178000 ST JOSEPH R. NEAR NEWVILLE, IN 08/08/97 0 1.5 12.1 27.1 30.8 22.5 6.0 0
04183000 MAUMEE R. AT NEW HAVEN, IN 08/07/97 0 2.8 7.7 27.4 34.6 26.1 1.4 0
04186500 AUGLAIZE R. NEAR FORT JENNINGS, OH 08/06/97 0 0.8 16.1 36.5 20.4 17.5 7.3 1.4
04193500 MAUMEE R. AT WATERVILLE, OH 08/04/97 0 11.4 22.9 24.0 28.1 7.3 6.3 0
04208504 CUYAHOGA R. AT LTV STEEL AT CLEVELAND, OH 07/17/97 0 5.0 24.0 41.0 26.0 4.0 0 0
04211820 GRAND R. AT HARPERSFIELD, OH 06/24/97 1.1 14.9 26.6 31.8 16.9 7.5 1.1 0
04213500 CATTARAUGUS CR. AT GOWANDA, NY 07/15/97 0.7 13.6 20.7 25.1 27.7 10.3 1.9 0
Percent size and type of bed material found in streambed cores (size in millimeters)
% Pebbles % Gravel % Sand % Silt/Clay
--------- ----------------------- ------------------------------------------------------- -----------
STATION <=32>16 <=16->8 <=8->4 <=4->2 <=2->1 <=1->0.5 <=0.5->0.25 <=0.25->0.125 <=0.125->0.062 <=0.062
NUMBER (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm)
04159492 0 7.7 14.0 12.0 10.9 9.1 21.1 11.4 2.1 11.6
04161820 0.4 12.2 15.0 10.0 7.7 12.5 30.0 10.5 1.2 0.4
04175600 0 6.4 8.1 7.8 6.1 13.2 34.6 16.0 1.4 6.3
04178000 0 10.7 11.3 10.9 12.9 16.8 19.4 7.1 3.3 7.5
04183000 0 10.7 17.6 13.7 9.0 8.1 19.2 10.4 3.5 7.8
04186500 1.0 19.2 16.8 13.6 12.8 12.7 11.4 4.7 1.7 6.1
04193500 No streambed sample collected, bedrock bottom
04208504 1.8 3.1 5.7 8.0 14.5 21.9 33.3 8.4 1.8 1.5
04211820 No streambed sample collected, bedrock bottom
04213500 0 18.8 22.3 17.0 14.0 11.6 12.3 2.9 0.6 0.5
Percent size and type of bank material found in streambank cores (size in millimeters)
% Pebbles % Gravel % Sand % Silt/Clay
--------- ----------------------- ------------------------------------------------------- -----------
STATION <=32>16 <=16->8 <=8->4 <=4->2 <=2->1 <=1->0.5 <=0.5->0.25 <=0.25->0.125 <=0.125->0.062 <=0.062
NUMBER (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm)
04159492 0 1.4 0.5 0.6 1.0 2.4 18.0 38.8 16.4 20.7
04161820 0 7.8 11.6 7.4 3.8 2.1 12.9 32.7 13.9 7.8
04175600 0 0.1 0.7 1.0 2.6 4.8 16.5 33.1 13.0 28.2
04178000 0 0 0.7 3.4 5.4 5.2 7.2 13.0 10.9 54.2
04183000 0 0.2 0.3 1.2 3.0 3.4 9.2 22.6 16.3 43.9
04186500 0 0.6 2.4 3.3 5.0 4.7 7.7 13.0 11.0 52.3
04193500 0 0 1.2 1.4 2.3 3.6 12.9 24.1 21.6 33.0
04208504 0 0 0.2 0.4 1.0 2.0 10.7 28.6 20.3 36.7
04211820 0 1.3 3.4 4.2 4.8 9.4 20.8 16.1 11.9 28.1
04213500 0 0.3 0.3 0.6 0.9 1.8 11.3 24.9 22.9 37.1
REFERENCES CITED:
Rosgen, D.L., 1994, A classification of natural rivers: Catena, v. 22, p. 169-199.
Wolman, M.G., 1954, A method of sampling coarse river-bed material: Trans. Am. Geophys. Union, v. 35, p. 951-956.