Date registered: Feb 2006
Vehicle: 1999 ML320
Mentioned: 1 Post(s)
Quoted: 310 Post(s)
is from precipitation i.e. rain.
Originally Posted by From TeachersDomain
Many experts suggest that natural solutions can help to minimize the devastation from floods. They advocate restricting the development of communities in floodplains to keep people and property out of harm's way. They recommend farming practices that help reduce the erosion of topsoil, and in turn the amount of runoff. These include constructing terraces where necessary to reduce the slope of fields, planting non-cash crops between crop rows to better retain moisture and protect topsoil, and plowing circular bands along the contours of fields to slow the flow of water off of them
Here's ya go from the usgs
Originally Posted by usgs
When rain or snow falls onto the earth, it just doesn't sit there -- it starts moving according to the laws of gravity. A portion of the precipitation seeps into the ground to replenish Earth's ground water. Most of it flows downhill as runoff. Runoff is extremely important in that not only does it keep rivers and lakes full of water, but it also changes the landscape by the action of erosion. Flowing water has tremendous power -- it can move boulders and carve out canyons (check out the Grand Canyon!).
Now go back and read what I wrote "Depending on where you are in the flow you might get soil dumped on your land..." The LEVEE system makes a nice funnel which deposits dirt from upstream which now can roll downstream and deposit itself in the bottom of the river, raising the bottom, shallowing the river and making the next flood worse.
What you post is correct IF there are not levees and IF you are talking about certain parts of the streams. Where do you think those rich sediments come from? Other peoples farms. Luck of the draw. But before man intervened, you are correct. Unfortunately we are no longer at that state of environment.
You might ought to have read the rest of the way down the article before posting it up.
Last edited by mlfun; 06-18-2008 at 11:54 PM.