More than one billion people (1 in 6) do not have access to adequate clean fresh water – which is defined as just 20 to 50 liters per day. (In contrast, the average American can use in excess of 400 liters per day indoors.) More than 2.5 billion people do …
Watershed Hydrogeology Lab graduate student Brock Freyer has spent the last two years learning deeply about the hydrology, geomorphology, and sedimentology of the Upper Mississippi River System, as well as learning to use some sophisticated GIS techniques for 3-D analysis of topographic data. This week he is presenting the results …
Boundary Layers and the no slip condition [youtube=http://www.youtube.com/watch?v=cUTkqZeiMow] Laminar Flow in a Pipe [youtube=http://www.youtube.com/watch?v=KqqtOb30jWs&NR=1] Turbulent Flow in a Pipe [youtube=http://www.youtube.com/watch?v=NplrDarMDF8&NR=1] Subcritical and supercritical flow over a weir (video courtesy of Little River Research and Design) Standing Waves [youtube=http://www.youtube.com/watch?v=rFOt-oOUzJY]
This post is cross-posted at Highly Allochthonous. Please look over there for 15+ comments on the post. Meandering rivers are characterized by regularly spaced bends that grow and cutoff and generally march downstream in a fairly orderly fashion. Click the image below to watch a movie of meander migration on …
The Watershed Hydrogeology Lab is going to be busy at this year’s Geological Society of America annual meeting in Portland, Oregon in October. We’ve submitted four abstracts for the meeting, I am co-convening a session, and I’ll be helping lead a pre-meeting field trip. I’ll be an invited speaker in …
The Watershed Hydrogeology Lab is going to be busy at this year’s Geological Society of America annual meeting in Portland, Oregon in October. We’ve submitted four abstracts for the meeting, I’ll be co-convening a session, and I’ll be helping lead a pre-meeting field trip. New lab member Cameron Moore has …
[Cross-posted at Highly Allochthonous] “Ten thousand rocks and grassy islets meet the traveler’s eye, ten thousand murmuring streams meander through them. During low water the cattle delight to graze upon the islets…at such times they furnish a curious spectacle in the midst of a mighty river.” So wrote architect Robert …
Cross-posted at Highly Allochthonous. Any further discussion will be found there. For the past week, the flooding in the Upper Midwest has been all over the news, as rivers have reached record levels and thousands of people have been evacuated across several states. A couple of science bloggers have been …
As the casualty count continues to climb in China’s Sichuan province following the May 12th M 7.9 earthquake, authorities are struggling to provide shelter and prevent disease amongst the 5 million people displaced by the quake. Seismologists are warning that there is still the potential for large aftershocks, and many …