Laserfiche WebLink
<br />Additional particle-size data collected included information on <br /> <br />roundness and vertical orientation of the particles in the stream bed. <br /> <br />The roundness of the particles was determined using guidel ines provided <br /> <br />by Krumbein (1941). The determination of the vertical orientation of <br /> <br />the particles was based on which axis--short, intermediate, or long--was <br /> <br />vertical. <br /> <br />Additional data on the relative amounts of bank vegetation, bank <br /> <br />irregularities, bed aquatic growth, and bed material compaction were <br /> <br />also obtained. Except as noted in table 1, these factors were classi- <br /> <br />~~ <br />fled as having I ittle ~ no effect on flow resistance. Although these <br /> <br />cross-section and bed-material data were obtained after the peak flow <br /> <br />during the low-flow season, the lack of noise produced by boulders <br /> <br />roll ing along the stream bed, the tight packing of the bed material, a <br /> <br />lack of bank erosion, and the undisturbed aquatic growth of the stream <br /> <br />bed indicate that these data were representative of stream conditions at <br /> <br />the time of peak flow. <br /> <br />DATA ANALYSES AND INTERPRETATION <br /> <br />/ <br /> <br /> <br />The field data obtained were used to determine the following: (1) <br /> <br />a plan view of the reach; (2) cross sections at each site; (3) the <br /> <br />water-surface profiles for each bank and each discharge measurement at <br /> <br />each site; and (4) a frequency distribution of the sizes of the intermediate <br /> <br />axes of bed-material at each site, an arithmetic average of the par- <br /> <br />ticles' upstream dimensions of height and width, an arithmetic average <br /> <br />of Krumbein's roundness, and the average percent of vertical orientation <br /> <br />of particles at each site. <br /> <br />If <br />