Changing Tide

In this pic you could observe that there is a very distinctive contrast on the surface of the water. On the left, the surface looks polluted and the one on the right looks clear. What causes this phenomenon?


Twice a day, there is a change of tides. When the tide is at it's ebb, the incoming and outgoing tides are very slow moving. This pic was taken at the estuary of Sarawak River. The sea was rather calm, so the confronting line could be seen clearly.


The continuous line made by the tides could be seen as far as the eyes could see.


The "battle" between the two tides will be dragging on. You'll only realized that it high tide by the gradual rise of water level.