![]() This change might also be more noticeable during the different months of the year since water usage tends to fluctuate. This, in turn, could slightly alter the smell and taste of the water. Thanks to this type of treatment, the bacteria, viruses, and metals in water can be eliminated. Lake turnover smell could also be caused by water treatment amenities – such as ozone. As you can probably already guess, when a lake turnover happens, all the phosphorus-rich water gets to the surface and gives the algae there enough fuel to bloom. The common thing between all of these is that they release phosphorus while decaying – the primary fuel of algae. This includes dead algae, dead weeds/leaves, and more. But that’s not everything – the hypolimnion also becomes the home to everything that sinks to the bottom during these months. Because of this, the bottom layer of water (or the hypolimnion) tends to get de-oxygenated – new oxygen cannot reach it. During the warm summer months, the lake’s water stratifies – as we already established. And if you do not know why this happens, then we have a brief explanation. One of the common reasons for lake turnover smell is the fact that the algae bloom during this process. However, the lake turning offer might not always be the cause of this event – there might be other factors at play. Many people report a noticeable change in the smell and taste of water when this happens. Dimictic – the water in these lakes stratifies during the summer and winter, and they usually experience turnover twice – once in spring and once in fall.Polymictic – they frequently mix throughout the year.Warm monomictic – a common type of lake whose water usually reaches the 39.2☏ mark during the winter, and they experience turnover during this time – such as the major lakes in the South.For example, most lakes in the Arctic are cold monomictic. Cold monomictic – the water in these lakes does not go over 39.2☏, so lake turnover occurs once during the summer months.There are four general categories, though: ![]() Lakes are also classified into several categories, depending on how often they turn over. Shallow lakes rarely have their water separate in layers with different temperatures, hence why they are more unlikely to turnover. It is important to add that not all lakes are stratified. But, typically, summer lake turnover is the most common scenario. During this process, the bottom layer of water starts shifting to the top – hence the term turning over.Īs we already mentioned, this process may happen more than once a year. It inevitably reaches a point in which it becomes denser than the water underneath, therefore causing it to sink. So, what does this mean in the context of a lake turning over? When the temperatures drop, the top layer of water starts to get colder as well. Geological Survey (USGS), water is densest at a temperature of 39.2☏ or 4.0☌. When the temperature of water changes, it also changes its density – hence why its weight fluctuates. Now that this is out of the way, it is time to mention water density. The bottom layer is called the hypolimnion.It has a very steep temperature gradient. This layer sits between the epilimnion and the hypolimnion. The middle layer is known as the thermocline. ![]() During the warmer months, this layer has a noticeably higher temperature. The upper layer is called the epilimnion.But why does this happen? Simply put, the water in stratified lakes can be split into three layers: But before we get to this part, let’s go into a bit more detail on the topic of ‘Why does a lake flip?’Īs we already mentioned, lakes flip when the weather gets colder. This might sometimes be the case – we will shed some light on these changes and how they could affect the lake’s inhabitants. ![]() But we will talk more about this in a bit.Īnother common topic is that lake turnovers result in changes to the smell and taste of the water. For example, the water in shallow lakes tends to mix more frequently, and it does not undergo the process of stratification. Of course, these turnovers could differ from each other depending on the size of the lake and the change in temperature. But what does it mean, and why does a lake turn over? This process usually takes place when we leave the warm summer months and the temperatures begin to drop. Whenever we get close to the colder months of the year, every experienced angler starts to mention the term ‘lake turnover’ more and more often.
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