Why is water green, the difference between green water and dirty green water

Who told you that water is green.

The difference between green water and dirty green water is that the degree of dirty green water is more severe, arrivedAlgaeThe extent of the outbreak needs to be cleaned up immediately, and the fish cannot be eatenCyanobacteria, and will occupy too much space, making the water dark green and reducing dissolved oxygen, which is not suitable for fish to survive; And green water refers to a large amount of itChlorellaThe water, so overall green, this algae can be used as food for fish and can also absorb from the waterAmmonia nitrogen, so it's perfect for fish farming.

Although green water may not look clean, it actually has the effect of purifying water quality. Because green water contains chlorella, algae can remove ammonia nitrogen and nitrates from the water body.

Absorption, thus avoiding poisoning of the fish, also prevents the pH**, and the water becomes acidic.

Water quality requirements for fish farming:

1. The water quality is clear, not thin or fat.

The water quality is clear and there are fewer suspended particles. The water should not be too thin (like pure water) and should not be too fat (there will be oil films, foam, algae blooms, etc.).

2. The smell is normal.

Odorless, or with a hint of fishy smell. If there is a fishy odor, there is definitely a problem with the water quality.

3. The water color is normal.

The water color is made up of plankton.

algae) species and abundance. Good water color should be a light brown, yellow-green, and oily green, while bad water should appear gray-white, gray-yellow, and black-brown. If the water in the fish tank is as colorless and transparent as pure water, it means that the water is too thin and the bacteria in the water are too small, which is not the good water we want.

What does green water mean is as follows:

So-called"Green water", mainly refers to the rainwater stored in the soil of plant roots, that is, the water vapor that originates from precipitation, stores in the soil and enters the atmosphere through evaporation and transpiration. "Green water"The concept is relative to rivers, lakes and aquifers"Blue water"In other words. "Green water"The concept was developed by Falkenmark in the early 90s of the 20th century.

To put it simply:"Green water"refers to invisible water"Blue water"It refers to visible water. China in"Green water"Research is just beginning.

In a certain watershed,"Green water"(gaseous water) is recycled to supply terrestrial ecosystems"Blue water"The (liquid water) cycle feeds the water needs of aquatic ecosystems and people. "Green water"The cycle reflects the natural world"Soil - plants"Water consumption of the lead system. "Blue water"It flows on the surface and underground, from the top of the mountain to the foot of the mountain, from land to sea.

In 1995, the concept of green and blue water began to emerge. From the perspective of the water cycle, 65% of the world's total precipitation is returned to the atmosphere through evapotranspiration from forests, grasslands, wetlands and rain-fed farmland, which is called green water (green water flow); Only 35% of precipitation is stored in rivers, lakes and aquifers, known as blue water.

Green water was originally defined as evapotranspiration, which is the flow of water vapor to the atmosphere, and later defined as a specific water resource, i.e. green water is water that originates from precipitation, is stored in the soil and is consumed by evaporation of vegetation, especially in rain-fed agricultural areas.

The water of the river (lake) reflects the color of the mountains on the shore, and the plants and algae-like plants in the water are more likely to grow, so the river water is mostly green.

Seawater is different. Seawater is transparent, when sunlight is transmitted into seawater, it is decomposed into red, orange, yellow, green, cyan, blue, purple seven colors of light, seawater can absorb red, orange and yellow rays with longer wavelengths, and less absorb blue and purple light with shorter wavelengths, so blue and violet light can be transmitted to very deep sea, and it is easy to be scattered by seawater molecules, so people see that seawater is dark blue.

There are some lower plants that grow, such as blue-green algae.

It contains a lot of algae and is green.

First, the oxygen in the air in the river flow will be dissolved in the water, so that the oxygen in the water will cause the green algae to grow, which will look dark green to the naked eye.

Second, due to the pollution of wastewater from surrounding factories and residential garbage, the river has excessive nitrogen, phosphorus and potassium content in the water body, resulting in eutrophication of the water body. At this time, the green algae in the water body will grow wildly, and a large dark green patch will appear.

Third, the physical phenomenon is that the refraction of light in water makes it appear green to the naked eye.

The bottom of the river is mostly aquatic plants and the like. So it's green on the back. The river water is green because there are algae that perform photosynthesis in the river water.

Selective absorption is the main reason why objects show color. In a certain wavelength range, if a substance absorbs an equal amount (referring to energy) of light of various wavelengths passing through it, and the absorption amount is very small, the substance is called general absorption; If a substance absorbs a certain wavelength of light energy significantly, it is said that the substance has selective absorption. When sunlight hits the surface of the sea, some of the light is reflected back and the other part is refracted into the water.

The light that enters the water is absorbed by the water during its propagation. The absorption of light by water is related to the wavelength of the light, i.e., water has selective absorption. Water absorbs light with longer wavelengths significantly, but not with shorter wavelengths.

Red, orange and yellow light are all absorbed at different depths and increase the temperature of the seawater. To a certain depth the green light is also absorbed.

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Problem description: I have a freshly built pond filled with tap water, but after a few weeks the water gradually turns green. There are only a few goldfish, yellow eels and crucian carp in the water, why does the water turn green, and when the water is caught, it looks like clear water? There are several ways to say this:

1 Water eutrophication, the water contains some green algae that are invisible to the naked eye.

2 Because the water is slightly deeper (almost a meter deep), the light is refracted and the water appears green (but there is still a problem of green water in shallow water).

Analysis: Water turning green is the reason for the proliferation of green algae, ozone has strong oxidation and can kill green algae, but if ozone is directly passed into the aquarium, it will also kill fish and aquatic weeds, so it is usually used to use ozone to access the protein skimmer, and after the water flow is affected by ozone and volatilized, clean water flows into the tank, so ozone will only kill the planktonic green algae, but there is no way to attach the green algae, and this method is very costly, only aquarium enthusiasts will use it, And they don't use ozone primarily to get rid of green algae, so it's not very practical.

First of all, you don't have to be alarmed by these green algae, the traditional Chinese goldfish farming method strongly advocates the use of green water to raise fish, because green algae can absorb harmful substances in the decomposition water through photosynthesis and release oxygen, and it is also a good auxiliary food for goldfish.

But if the landlord is raising fish in an aquarium, then the green algae is very aesthetically detrimental, and the most popular and feasible way to prevent the bloom of green algae is .........Changing the water, well, is changing the water, even the master of the aquarium is now doing this (because the accumulation of nitrate leakage in the bare tank is a worldwide problem), reduce the "nutrition" degree of water, and the green algae will naturally not be able to multiply. There are also some auxiliary methods: planting aquatic plants, lowering the light, feeding less (as if abusing animals), raising some algaecide creatures such as scavengers, scrubbing the walls of the tank (this is also counted!).

etc., are very simple and easy to use, and the effect is good. Well, that's all I have to say, I hope it will be helpful to the landlord

Because the water is not pure water, and the depth of the water is relatively large, when the thickness of the water layer exceeds 2 meters, the color of the water will change due to the refraction and reflection of light, and there are some algae and microorganisms in the water, so it appears turquoise. The reflection of light makes up the electromagnetic waves of sunlight at different wavelengths, and different objects reflect electromagnetic waves of different wavelengths. It's the same as the fact that the sea is blue.

Water: Water is an inorganic substance composed of hydrogen and oxygen, which is non-toxic and drinkable. It is a colorless and odorless transparent liquid at room temperature and pressure, which is known as the source of human life and is an important substance to maintain life.

Water is one of the most common substances on Earth. 71% of the Earth's surface is covered by water. It is an important resource for the survival of all life, including inorganic chemistry and human beings, and it is also the most important component of living organisms.

Pure water is a very weak electrolyte with very weak electrical conductivity. Water in daily life has more anions and cations due to the dissolution of other electrolytes, so it has more obvious conductivity.