Part 3. RECURRENCE FREQUENCY OF FLOODING.
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RECURRENCE FREQUENCY OF FLOODING
This isohyetal map was constructed for the record storm sequence of Dec 18-27,1964 in northern California. Note the local variances in precipitation, between 10 and 30+ inches of rain
The bed of the Mississippi River is below sea level during the last 450 miles of its course, up to Greenville, Mississippi. This causes the upper portion of the river to fall over the lower part, creating turbulence and undercurrents which wreck havoc on outboard bends in the channel.
River systems excavate their beds in response to major shifts in base level, such as sea level; and changes in flow regimen, caused by changing weather patterns, which impact runoff and sediment load