Author Archives: Anne Jefferson

Flooding around the world

Posted on January 31, 2011 by Anne Jefferson

Based on information from The Flood Observatory and other news sources, here are some tidbits about on-going and recent flood events around the world. Every one of these floods is having significant local and regional impacts, even if they don’t … Continue reading →

Categories: by Anne, geohazards, geomorphology, hydrology

Edible debris flow

Posted on January 28, 2011 by Anne Jefferson

Steep hillslopes with loose sediment are at risk from debris flows triggered by heavy rain or rapid snowmelt. As water is added to the hillslope, surface runoff or positive pore water pressure catastrophically destabilizes a portion of the slope. I decided to undertake my own research and investigate the possibilities for an edible analog for debris flows. Continue reading →

Categories: by Anne, geohazards, geomorphology

Geology is destiny: globally mapping permeability by rock type

Posted on January 25, 2011 by Anne Jefferson

The first maps of the global distribution of the ease of subsurface water flow have been produced, and they are based on maps of rock type. Continue reading →

Categories: by Anne, geology, hydrology, paper reviews

Flooding on the flanks of Mt. Hood

Posted on January 21, 2011 by Anne Jefferson

It’s the middle of January. You’ve traveled to Oregon’s majestic Mount Hood for a weekend of skiing the snow- and glacier-covered slopes. On Saturday morning when you begin to head up the mountain from Portland, it’s warm and raining. “No … Continue reading →

Categories: by Anne, geomorphology, hydrology

Landslides and flooding in Brazil

Posted on January 18, 2011 by Anne Jefferson

While Australia continues to cope with widespread flooding in Queensland and elsewhere and the death toll continues to rise (at least 20 people), in Brazil landslides and flooding in the past week have claimed at least 700 lives. Yet international … Continue reading →

Categories: by Anne, geohazards, hydrology