Surface modification of Muddy River lahar deposit, Mount St. Helens National Volcanic Monument, Skamania County, Washington

Purpose of the project is to note and describe the extent of modification, since 1980, of the surface of the upper Muddy River lahar deposit. Several traverses will involve measurements concerning the density, width, and depth of drainage channels, and changes to interfluve areas. These will be compared with features recorded on aerial photographs and related to longitudinal gradients of channels and surface. The information is to be summarized in a written report.


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