The influence on the tide height by land shapes and other obstructions can be considerable, so that at places a 40 foot mean rise of tide is usual while at others for instance, in the Mediterranean and Black Sea, there is no noticeable tide.
Impembbelelo yokuzala nokurhoxa kubude ngobumbo lomhlaba kunye nezinye izibumbo zomhlaba nezinye izithinteli ezinokuqwalaselwa, ukwenzelwa ukuba ezindaweni iinyawo ezingamashumi mane zikhule kukurhoxa nokuzala okuqheliweyo ngelixesha ezinye umzekelo kolwandle lwemeditari kunye nolumnyama, kungekho kuzala nakurhoxa kuboniweyo.