Reading the Washington Landscape
Reading the Washington Landscape's Latest Posts
Bit heavy work load and life so posting has been limited. Just finished a very challenging report that greatly deviates from a number of previous geologic interpretations of a certain location.Did have some field work at a site underlain by very silty hard glacial drift.Not much water infiltration once the forest duff topsoil is removed at this site.DT once pointed out that all those little cobbles embedded in the silty clay glacial drift are glacial erratics. So I should not have been […]
When looking at maps or reading or traveling I find it helps with perspective by placing the location on my own familiar landscape. So this morning I drew a rough outline of Gaza over my home territory.
As a bit of follow up on the DEM (digital elevation model) messing about I zoomed in a bit at the Nooksack River avulsion (course change) location near Everson.The river flows into the image from the south across a broad braided-channel flood plain. The river then bends sharp to the left at Everson just before it passes under a State highway bridge. It appears almost delta-like as over bank deposits on either side of the river cover a broad flood plain down stream of the Everson Bridge. If […]
A bit of messing around with some DEM (digital elevation model) and came up with some visuals of the lower Nooksack River in northwest Washington. By shifting the elevations of the colors one can enhance features that would otherwise be hard to see.The first image shows the complicated story of part of the Nooksack River and some late ice age drainage patterns. The dark green is lower elevation. The Nooksack flows towards the west into a broad valley formed by an […]
The GEER report on the Oso slide has been released. http://www.geerassociation.org/GEER_Post%20EQ%20Reports/Oso_WA_2014/index.htmlGEER stands for Geotechnical Extreme Events Reconnaissance. I believe this is the first landslide the program has looked at. They visit sites shortly after huge floods, tsunamis and earthquakes to gather evidence of the event before it weathers away. I utilized a GEER report for assessing scour potential from tsunami in a tsunami inundation area.
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