The short tribal man in front of me looked at me with such a criticism, which made me feel a little guilty.

After saying this, the man said stiffly: "Come out here, by the water."

That's what I mean by the river together?

I followed this man out, walked out of the house and turned right to the end, and there was a slowly flowing river. The origin of this river was the stream of Mount Mades, and most of the water source was along the big river on the edge of the pasture and the middle of the forest farm.

The remaining part of the water flow was led to the front of the ranch, forming the tributary I saw. After this tributary flowed through the ranch in Ore Town, it also cultivated Yudal and Mrs. Liliya's chicken farm, flowed through the entire ranch area, and finally poured into the sea together.

Seeing this almost perfect flow route, I couldn't help but wonder if this tributary was a canal dug by the town people?

The uninvited guest ignored these things and walked straight to the riverside, reached out and scooped a handful of water by the river. He first observed the color for a long time, then smelled the smell, and felt that there was no problem with the appearance, so he carefully tasted it.

Since this river is the lower reaches of the mountain spring, the water source must be very clear. Especially since I am still at the upper reaches of the pasture area, there is no other pollution source above me.

As long as Gotz is on the mountain, don't pee into the river?

"Tsk, this is a risk. Go check Gotz's hygiene habits another day."

But the uninvited guests were not satisfied with the water source of the river.

I can tell from this person's helpless expression.

"You can't drink it directly, there are leaves."

This person said this and pointed to the rotten leaves and dead branches on the water to show me.

I have actually discovered this. Since the upstream is Mount Mades, the dense vegetation on the mountain will naturally affect the water quality of the pasture water to a certain extent. While trees conserve water sources to prevent water shortage, they will also produce humus, causing microorganisms to pollute water.

Before I could tell this person that I usually don’t drink raw water here, but I always drink the tycoon water from Boss Dart. This person had already lifted his sleeves and started working.

I saw this man found a branch and inserted it into a soft sand by the river. He saw that the branches had obvious water marks three or four inches long, which should have touched the seepage layer flush with the riverbed.

Then, the man used branches to dig up the ground there, and soon dug a deep pit on the sand. The water flow quickly seeped out from the ground and poured into the deep pit.

Since the white sand was dug out, there was dark river mud below, and the deep pit was dark and the water inside was also filled with a hint of malicious black light. Perhaps because it was a mixture of mud and sand, the seeped water was still floating with a layer of mud slag, which did not look like drinking water.

Sure enough, the uninvited guest also frowned, not very satisfied with the result.

I saw this man stand up and start searching for the pasture for the supplies needed.

Starting from small stones, dead leaves, and tiny branches, a large handful was collected soon and three small piles were piled on the river beach.

Then, the man found moss on the river bank.

Because the river water in the upper reaches is rich in humus, there is a layer of beautiful green moss on the river bank downstream, which fluffyly climbs over the rocks on the river bank.

The soil with green moss generally has a salt content of more than 0.3%. The higher the salt content of the soil, the more green moss will be and the darker the color; in addition, green moss likes moisture. When the humidity is too high, especially after the soil is fertilized, the soil is moist and nutrients are sufficient, the green moss will be more, or when there are too many rainy days and insufficient light, it is also conducive to the soil breeding of green moss.

These green moss, which originally grew freely, were quickly lifted up and spread out flat on the river bank.

Next, a project that I didn't expect began.

After filling the pit just now, the man dug another pit, but this time the excavation was much slower. He first dug out an equally deep but rectangular groove. The black water immediately seeped out, but the man didn't care. After carefully building a 45-degree angle ramp, he began to fill the ramp with various things.

First, a layer of small stones was stacked into a wall, covering the entire slope in fine detail. Then, prepared small branches were inserted between the gaps of the stone wall, and then branches were also set up horizontally to form a branch frame that was intertwined horizontally.

After these basic operations, the entire sink already had a very stable bracket base, and the mud and sand below would not continue to slide and collapse with the seepage. The man grabbed the dead leaves in his hand, spread them on the shelf, and added a thick layer of leaves to the shelf.

Finally, around this leaf layer, the man used a clean white sand mat by the river to mattress. The sand fell between the leaves and branches, filling the smaller gaps.

At the end, the velvet blanket-like green moss covered the ramp, adding a touch of vitality to the dark pit, and it looked particularly fresh and natural. And I found that when the man placed the green moss, he grabbed a handful of unknown substance from his animal skin pocket and filled it under the green moss.

Seeing this, I probably guessed what this man wanted to do, so I rolled up my sleeves and built it with this uninvited guest.

Soon, the four walls of the pit were all made in the same way, and the underground was repaired and green moss was laid as embellishment.

"So amazing! I can't imagine how good your skills are!"

I sighed sincerely.

There is no doubt that this is a simple well for drinking water. It is built on the bank of the river and uses the water seepage of the river to obtain water.

Many primitive tribes will use this method to fetch water, because this can use riverbank soil to penetrate and filter impurities, harmful substances, microorganisms, etc.

However, the uninvited guest's approach is not that simple. The stones and branches play a fixed role to prevent the river bank from collapse or the trampling of people to destroy the well.

Leaves and moss are amazing. These two things are used as simple filters to filter out harmful substances from the water. Because the gap between the two is very small, a large number of microorganisms and impurities will be adsorbed on it, so the filtered water flow will be clearer.

This operation is no longer the level of a primitive man, but the prototype of a water purifier!

A water purifier can effectively filter out rust, sand, gravel, colloids, and chemical agents such as residual chlorine in the water, odor, heterochromatic, pesticides, as well as impurities such as bacteria, bacteria, toxins, heavy metals, etc. in the water. The application of water purification technology in the field of drinking water effectively solves endemic diseases caused by excessive harmful substances in groundwater in many places.

Most water purifiers use five-stage filtration technology. The first stage is the filter element, also known as PP cotton filter element (PPF), the second stage is the particulate activated carbon (UDF) filter element, the third stage is the precision compressed activated carbon (CTO) filter element, the fourth stage is the reverse osmosis membrane or ultrafiltration membrane, and the fifth stage is the post-mounted activated carbon (small T33.

The core of this technology is to filter water layer by layer through means and remove impurities through filter layers of different densities.

"That's amazing! How did you learn this!"

The visitor of the tribe stood up and wiped the sweat from his nose, without looking too excited, and said.
Chapter completed!