Case Studies in Quantification and Mapping of Stream Channel Morphology in the Pacific Northwest: Lessons From Past Efforts and Recommendations for Future Studies, Montana, and Northern California <p> HR: <span class="hr"> 15:10h<br></span> AN: <span class="an"> H32F-06 <a href="../absbook/fm03-H32F.pdf">[PDF]</a><br></span> TI: <span class="ti"> Case Studies in Quantification and Mapping of Stream Channel Morphology in the Pacific Northwest: Lessons From Past Efforts and Recommendations for Future Studies, Montana, and Northern California <br></span> AU: <span class="au"> * O'Connor, M D<br></span> EM: <span class="em"> matto@oe-i.com<br></span> AF: <span class="af"> O'Connor Environmental Inc., PO Box 794, Healdsburg, Ca 95448 United States<br></span> AB: <span class="ab"> Watershed analysis seeks to identify patterns in channel geomorphology and sensitivity of different channel types to management influences. Although most analyses succeed in identifying patterns in the distribution of stream channel morphology and develop reasoned hypotheses regarding effects of past and future management, these conclusions generally rely on extrapolation of trends with high statistical variance. Field data are rarely collected in sufficient quantity and precision to satisfy common standards of statistical rigor. Nevertheless, field data form the basis for conclusions regarding watershed form and process. This paper reviews data from previous analyses in Washington, Montana, and northern California to gain insights regarding limitations on collection of data sets for rigorous analyses, including both high statistical variance in fluvial systems and cost of field surveys. Recommendations for techniques and protocols to develop rigorous field data sets that can be combined with remote sensing data to produce improved watershed scale assessments are offered. These methods are suitable for developing monitoring baseline surveys, which can be utilized for either long-term monitoring and adaptive management experiments. <br></span> DE: <span class="de"> 1800 HYDROLOGY<br></span> DE: <span class="de"> 1815 Erosion and sedimentation<br></span> DE: <span class="de"> 1824 Geomorphology (1625)<br></span> SC: <span class="sc"> Hydrology [H]<br></span> MN: <span class="mn"> 2003 Fall Meeting<br></span></p></body></html>