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<br />r <br /> <br />001546 <br /> <br />" <br /> <br />I' <br /> <br />3. Note significant changes in grade, changes in vegetation, bed <br />and bank material, slope, and other physical features in <br />survey notes. <br /> <br />4. Measure stream distance between cross sections using top of <br />bank locations on either side to estimate center of the <br />channel. <br /> <br />5. Photograph each section. <br /> <br />6. Sketch each section and general plan of study reach to show <br />significant features. <br /> <br />D. Collect the following hydraulic information: <br /> <br />1. Perform stream discharge measurement for study reach using <br />USGS stream gaging procedures. <br /> <br />2. Assess the channel roughness and identify roughness changes in <br />each cross section up to bankfull stage and near overbanks. <br /> <br />3. Incl ude vegetation associ at ions and features of channel and <br />overbanks in sketch. <br /> <br />4. Qualitatively assess channel stability at each section and for <br />entire study reach. <br /> <br />5. Photograph any significant erosional or depositional features. <br /> <br />E. Sediment i nformati on. Data must be coll ected in accordance wi th <br />USGS standards ("Field Methods for Measurement of Fluvial Sediment" <br />and "A Field Calibration of the Sediment-Transporting Characteris- <br />tics of the Helley-Smith Bed-Load Sampler. ") <br /> <br />I. Obtain at least three surface 25-lb bed-material samples (more <br />than three may be required). <br /> <br />2. Obtain at least two representative (RB & LB) 25-lb bank <br />samples for the study reach (more than two may be required). <br /> <br />3. For coarse bed streams (050 > I") use Wol man pebbl e count <br />(Wolman, 1954) and/or photo grid to sample bed material. <br /> <br />4. Obtain depth-integrated suspended sediment sample. <br /> <br />5. Use Helley-Smith sampler to obtain 20 min. bed-load sample. <br /> <br />6. If practical, repeat stream discharge, suspended sediment, and <br />bed-load samples for a range of flow conditions, preferably <br />encompassing both the rising and recession limb of the <br />snowmelt hydrograph. <br />