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<Content><CHAT_MEDIA><SESSION>What%20;are%20;flood%20;plains%20;?&#10;&lt;&lt;%20;The%20;river%20;valley%20;has%20;become%20;very%20;wide,%20;and%20;the%20;river%20;is%20;flowing%20;very%20;slowly%20;from%20;one%20;side%20;to%20;the%20;other.&#10;&lt;&lt;%20;And%20;if%20;the%20;river%20;was%20;to%20;overflow%20;it%20;would%20;cover%20;all%20;this%20;flat%20;land%20;with%20;water.&#10;&gt;&gt;%20;What%20;are%20;levees%20;?&#10;&lt;&lt;%20;Levees%20;are%20;formed%20;by%20;the%20;river%20;depositing%20;material%20;on%20;its%20;side%20;and%20;on%20;its%20;bed,%20;so%20;raising%20;itself%20;up%20;above%20;the%20;flood%20;plain,%20;</SESSION></CHAT_MEDIA></Content>