You might not think that water temperature is considered an important water-quality measurement. Visit Media to see details.Ī hot parking lot can cause heated runoff to enter streams. Impervious surfaces contribute hot water to streams Some compounds are also more toxic to aquatic life at higher temperatures. Warm water holds less dissolved oxygen than cool water, and may not contain enough dissolved oxygen for the survival of different species of aquatic life. Warm stream water is can affect the aquatic life in the stream. The cold soda can keep more of the carbon dioxide bubbles dissolved in the liquid than the warm one can, which makes it seem fizzier when you drink it. Think about how much "bubblier" a cold soda is compared to a warm one. ![]() ![]() It is the opposite when considering a gas, such as oxygen, dissolved in the water. Water, particularly groundwater, with higher temperatures can dissolve more minerals from the surrounding rock and will therefore have a higher electrical conductivity. The rate of chemical reactions generally increases at higher temperature. Temperature is also important because of its influence on water chemistry. As temperatures get too far above or below this preferred range, the number of individuals of the species decreases until finally there are none. Fish, insects, zooplankton, phytoplankton, and other aquatic species all have a preferred temperature range. Temperature governs the kinds of organisms that can live in rivers and lakes. Temperature exerts a major influence on biological activity and growth. Millions of measurements and analyses have been made that have been influenced by water temperature. ![]() Geological Survey (USGS) has been measuring how much water is flowing in rivers, determining the water levels of groundwater, and collecting water samples to describe the quality of those waters for over a century.
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