Neap tides occur after the 1st and 3rd quarters of the moon when the difference between low and high tide is very small. The tidal range is very small around the 2 quarter Moons because the Moon and Sun’s gravitational force counteract each other at these 2 points of the lunar moon. Neap tides usually take place about seven days after spring tides.
Oceans and Some Rivers
Having true tides differs from having noticeable tides. The water body has to be huge, like an ocean for tides to be noticeable. Although true tides also take place in smaller water basins, such as large lakes, the tidal variations are too little to notice.
For instance, the largest tidal range in large lakes in the US is below 5 cm. Several weather conditions, like barometric pressure and wind, create huge differences in the level of water than tides on these lakes. Other water bodies where this happens are the Baltic Sea, the Caspian Sea, the Black Sea, and also the Mediterranean.
Low and high tides can also occur in rivers connected to the ocean. The water in some of these tidal rivers drains away almost completely at low tide, exposing land that can be walked across. If a part of a bigger river is affected by tides, the term tidal reach is used to describe the section affected.
A tidal bore can occur in some areas where the tide comes into a narrow bay or river. Tidal bores which are formed by the incoming tide are waves travelling against the direction of the water current.
Tides in the Human Body?
Many human cultures have some mystical belief about the mood. Also, many individuals believe that humans are also affected by the gravitational force of the moon because about 70% of the body is made up of fluid. However, there is no proof or scientific finding to support this belief. The amount of fluid in humans are very little to experience tides.