Delta formation processes at the Mississippi River mouth |
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| Authors: | V N Mikhailov M V Mikhailova |
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| Institution: | 1.Moscow State University,Leninskie gory, Moscow,Russia;2.Water Problems Institute,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | Specific processes of delta formation at the Mississippi River mouth are discussed. In the last 7000–8000 years, a series
of large deltaic lobes was formed in succession at the Mississippi River mouth under the condition of high river sediment
runoff and stabilization of the ocean level after its sudden postglacial rise. In the mid-XX century, the formation of a new
deltaic lobe began at the Atchafalaya Branch mouth. Over the last centuries, the processes of delta formation at the Mississippi
River mouth slowed down as a result of the river sediment runoff decrease after flow regulation of the Missouri and Arkansas
tributaries; in some parts of the deltaic plain, these processes gave way to degradation of marshes and seashore erosion under
the impact of intense land subsidence. The current processes of delta formation are under the great influence of local economic
activities. |
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