Types Of Waves

Constructive waves are smaller in height, (crest)

They have a strong swash which pushes material up the beach

Have a weak backwash so little erosion takes place.

Generated by storms a long way off.

Destructive waves are larger in height,(crest)

They have a weak swash which causes little beach building

Have a strong backwash so pulls sand and shingle down the beach

Generated by storms close by.