Seawalls akavakirwa padivi pemahombekombe, akakosha ma hydraulic zvivakwa kuti amire mafungu, masaisai kana masurge ekudzivirira kwemahombekombe.Mabreakwater anodzoreredza uye anodzivirira mahombekombe nekukanganisa simba remafungu, uye achibvumira jecha kuungana pamahombekombe.
Kuenzaniswa ne tranditonal rock fill, yakasimba polypropylene geotextile machubhu ane pa-saiti kuzadza kucheka mitengo nekudzikisa zvinhu kunze uye zvekufambisa.