We live across the road from the Annapolis Basin. It is ocean water. The tides come and go every day, approximately every twelve hours and twenty five minutes. We watch the water every day, and enjoy seeing the variation in the water. When the tide flows in it goes from west to east. When it ebbs it goes from east to west. When the wind blows in the opposite direction of the tidal movement, the surface water blows in the direction the wind is blowing. So although the water is moving one way, it looks like it is moving the other way. Interesting, and sometimes confusing.
One of the features of the water is foam. In the upper reaches of the Annapolis River coniferous forests produce organic matter which is resistant to decomposition. These organics, humic and tannic acid, wash into the waterways. Tannic acid gives tea its brown colour, and stains the Annapolis River and its tributaries a rich brown.
Like a bucket of soapy water, the Annapolis River foams when it is vigorously stirred. When the water goes through the Tidal Water Generating Station (the only one in North America) under the causeway between Annapolis Royal and Granville Ferry, the water is agitated vigorously, which produces foam.
In the calm of the early morning, the foam floats placidly on the mirror-like surface of the Annapolis Basin. The locals call that our mini icebergs. It looks really nice.
When the wind is strong it causes more foam, and it appears to cover the whole basin. Sometimes it looks like sand, and you think you should be able to walk across it.
When the wind is gusty the foam blows up and over the causeway onto cars and pedestrians. It can be messy, but it looks fantastic.
When the tide has gone out after a particularly blustery high tide, the shore is blanketed with foam.