▁flo od w aters ▁can ▁be ▁depos ited ▁in ▁coast al ▁shall ows , ▁eng ulf ing ▁re ed ▁b eds ▁and ▁changing ▁the ▁character ▁of ▁under water ▁fl ora ▁and ▁fa una ▁in ▁the ▁coast al ▁shall ows . ▁ ▁Burn ing ▁or ▁clear ance ▁of ▁veget ation ▁on ▁the ▁land ▁adjacent ▁to ▁the ▁beach ▁head , ▁for ▁far ming ▁and ▁resident ial ▁development , ▁changes ▁the ▁surface ▁wind ▁patterns , ▁and ▁ex poses ▁the ▁surface ▁of ▁the ▁beach ▁to ▁wind ▁er os ion . ▁ ▁Farm ing ▁and ▁resident ial ▁development ▁are ▁also ▁commonly ▁associated ▁with ▁changes ▁in ▁local ▁surface ▁water ▁flows . ▁If ▁these ▁flows ▁are ▁concentr ated ▁in ▁storm water ▁dra ins ▁empty ing ▁onto ▁the ▁beach ▁head , ▁they ▁may ▁er ode ▁the ▁beach ▁creating ▁a ▁l ago on ▁or ▁delta . ▁ ▁D ense ▁veget ation ▁tends ▁to ▁abs orb ▁ra inf all ▁reducing ▁the ▁speed ▁of ▁run off ▁and ▁re le asing ▁it ▁over ▁longer ▁periods ▁of ▁time . ▁ ▁Dest ruction ▁by ▁burning ▁or ▁clear ance ▁of ▁the ▁natural ▁veget ation ▁tends ▁to ▁increase ▁the ▁speed ▁and ▁er os ive ▁power ▁of ▁run off ▁from ▁ra inf all . ▁ ▁This ▁run off ▁will ▁tend ▁to ▁carry ▁more ▁s ilt ▁and ▁organ ic ▁matter ▁from ▁the ▁land ▁onto ▁the ▁beach ▁and ▁into ▁the ▁sea . ▁If ▁the ▁flow ▁is ▁constant , ▁run off ▁from ▁cleared ▁land ▁arriv ing ▁at ▁the ▁beach ▁head ▁will ▁tend ▁to ▁depos it ▁this ▁material ▁into ▁the ▁sand ▁changing ▁its ▁color