A little factoid I picked while prepping for discussions about The Control of Nature: uncontrolled rivers escape their banks, on average, every year and a half. If the average flow decreases, they deposit sediment and decrease their channel volume; if the average flow increases, they erode a larger channel.
Students seem to think that rivers aren’t supposed to flood, ever. I was surprised by how often they do, when they aren’t managed by dams or levees.
A little factoid I picked while prepping for discussions about The Control of Nature: uncontrolled rivers escape their banks, on average, every year and a half. If the average flow decreases, they deposit sediment and decrease their channel volume; if the average flow increases, they erode a larger channel.
Students seem to think that rivers aren’t supposed to flood, ever. I was surprised by how often they do, when they aren’t managed by dams or levees.