A singular spectrum analysis between the spatial and temporal changes of beach volumes and wave fields

It is an important part of the studies of the coastal land-ocean interaction for the changes of the beach in response to the wave dynamic action.The relationship between the volumes of continuously measured profiles in Nanwan beach and the variable wave heights of Nanwan nearshore region was discussed by using a sing ular spectrum analysis method,with which singular vector space distribution pattern was obtained.The results were shown as follows:(1) There was close relationship between the changes of beach volumes and wave dynamic action;(2) the sensitivity of response of the middle segment of the beach was obvious to the wave dynamic action;the sensitivity in the straight-line segment was the next in order;the sensitivity in the shadow zone was the weakest;(3) the related area between the wave field of the near shore region and the beach field was obvious,which was a key area primarily located in the middle segment of the beach,nearshore zone and the adjacent area of the line between the capes stretched out into the sea.