8 julio 2014
It takes a synchronized lock and dam system —- operating like a motorized flight of stairs on the Illinois River, using gravity to move the water —- to maintain a minimum depth for boat traffic. A disastrous domino effect occurred on April 19, 2013, when heavy rain and runoff, strong winds, and river currents resulted in seven unmoored barges crashing into the dam at Marseilles. Soil scientists have now studied the extensive repercussions of the incident.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/jj626l5Jg9g/140708111139.htm
