Lead
The sea is a great place for people to relax, especially for a leisurely walk along the seashore and feel the tranquility of the sea breeze, but in recent years, there have been unexpected people on some beaches.
They do not use iron rods to exercise, but use the principle of magnetic attraction to pan for magnetite ore, and make a net profit of hundreds of yuan a day, but the state prohibits this behavior, why?
First, the principle of "iron rod".
We all know that when we walk on the beach, we will get a lot of sand on the soles of our feet, and when we step on the sand, we will sink into it, and the sand will be scattered everywhere, and the calves will be red by the sand, which also makes people feel the weight of the sand.
What's more, there is a large influx of tourists every day to play on the beach, and the weight of the sand has far exceeded the weight of tourists.
Under the trampling of these people, the sand on the beach will become very fine, but the sand under the beach is very rough, because the sand under the beach is formed by being soaked for a long time in a humid environment, and the wet sand is heavier than the dry sand.
At low tide, the sea water carries silt and constantly washes the beach, and a little impact will wash the wet sand more delicately under the action of a long time, which is the reason for the appearance of fine sand on the beach.
However, at low tide, the sea carries the sand and ore from the beach into the sea, which is why the iron panners appear, and the sand and gravel on the beach contain a lot of ores, including iron sand.
The composition of iron sand is magnetite, which is why iron sand panning personnel use the principle of magnetic magnetism to pan iron rods, magnetite contains a large number of useful ferric tetroxide, mainly used for ironmaking, filters and other purposes.
2. Why is it banned?
Why does iron sand panning cause such serious harm to our ecological environment?
This is because the activity of iron sand disrupts the dynamic equilibrium of the riverbed, leading to the decline of the riverbed, which in turn has an impact on the riverbed profile and riverbed material of the riverbed.
The riverbed will also cause the collapse of the riverbank, which will lead to the widening of the river, and the reduction of the flood control embankment, thus affecting the flood resistance of the river.
Moreover, the falling riverbed will also have an impact on the riverbed profile, and the change of the riverbed profile will lead to a decrease in the stability of the riverbed, so when a large amount of water flows through the riverbed, there will be sand and gravel erosion, resulting in a large amount of sediment.
In rivers and lakes, sand panning activities can lead to the decline of the riverbed, which will affect the flood resistance of the river and the safety of navigation, which is very unfavorable for water conservancy projects.
The state's ban on sand panning is to protect the ecological environment and safeguard the overall interests, but because of the high interest of iron rod panning activities, they ignore the state's ban and continue to dig for iron sand.
Although the state prohibits iron sand panning activities, due to the high profits of iron sand mining activities, such activities "resurgence" from time to time to a certain extent.
In order to protect the ecological environment and safeguard the overall interests, the state has been prohibiting iron sand panning activities, but interests are the greatest driving force for all things, as long as there are interests, there will be no extinction.
So for the sake of the health of the ecological environment, how should the activities of iron sand be banned?