Laserfiche WebLink
<br />Dm Collllcllon & Analyala . <br /> <br />e <br /> <br />TABLE 5 - 2 <br /> <br />Typical Values (Reprinted lrom Chow. 1959) <br /> <br />Conduit Material <br />Concrete Lined ChllUlels <br />Rubble or Riprap Chamois <br />Rock <br />Unmaintained Earth <br />Excavated Earth, uniform and straight <br />Excavated Earth, with short gr..., few weeds <br />Mountain SlIeams, no vegetation, steep banks, trees on bank <br />Bottom: gravels, cobbles, and few boulders <br />Bottom: cobbles with large boulders <br />Flood Plains <br />Pasture, no brush <br />Short Grass <br />High Grass <br />Brosh <br />Scattered brush, heavy weeds <br />Light brush and !lees <br /> <br />Manning'. n <br />0.02~.035 <br />0.011-0.020 <br />0.03~.045 <br />0.050-0.140 <br />0.016-0.020 <br />0.022-0.033 <br /> <br />0.030-0.050 <br />0.040-0.070 <br /> <br />0.025-0.035 <br />0.030-0.050 <br /> <br />0.035-0.070 <br />0.035-0.080 <br /> <br />The National WATer Data STOrage and REtrieval System (WATSlORE) was <br />established for handling water data collected through the activities of the U.S. <br />Geological Survey and to provide for more effective and efficient means of releasing the <br />data to the public. The system is operated and maintained on the central computer <br />facilities of the Survey at its National Center in Reston, Virginia. <br /> <br />W ATSlORE can provide a variety of useful products ranging from simple data tables to <br />complex statistical analyses. A minimal fee, plus the actual computer cost incurred in <br />producing a desired product, is charged to the requester. Information about the <br />availability of specific types of data, the acquisition of data or products, and user <br />charges can be obtained locally from each of the Water Resources Division's District <br />offices. <br /> <br />General inquiries about WATSlORE may be directed to: <br /> <br />Chief Hydrologist, U.S. Geological Survey, 437 National Center, Reston. Vuginja <br />22092 <br /> <br />5.3.7 Groundwater. <br /> <br />In relation to chapter 3, groundwater can playa major role in the assessment of <br />streambank stability. The question that an engineer must answer is "Does groundwater <br />influence bank stability at this site?" If the answer is yes to this question, then the <br />engineer needs to identify the source of the groundwater and its associated impacts <br /> <br />e <br /> <br />Colorado Erosion Control Manual <br /> <br />61 <br />