In addition to the roads, Suren began to build the water supply system of the territory, and after more than ten years in this world, Suren is still very unaccustomed to the days when there is no running water.

In this era, the vast majority of urban water supply relied on well water, which needed to be purchased with money, and having a sweet water well in the city was a stable source of income, of course, some poor families chose to go to the river to fetch water, and the nobles chose more nearby mountain spring water.

Because it is not easy to get water, people in this era rarely take a bath, and civilians can be called hygienic when they take a bath once a month, and Su Lun can't accept those barbarian warriors under his command who don't take a bath for a month.

These energetic men have to patrol every day, sweep the wasteland and so on, and the smell of dust and sweat on their bodies is inevitable, so Su Lun forcibly requires them to take a bath every day, of course, this request has been unanimously supported by those barbarian women, and now even if Su Lun does not supervise those barbarian women, they will supervise their husbands.

Once he didn't take a shower, then he would have to spend the night outside tonight.

When Su Lun came to the river to investigate, he saw a group of men and children with bare buttocks, jumping into the Hongsha River to bathe.

At this time, the weather is not too cold, and it is not bad to take a bath here, but after a while the weather will not snow it. Suren was preparing to build a water supply facility along with a number of public baths.

The magic of this world can do many things that technology could not do in previous lives, but the number of wizards determines that magic is difficult to promote. The water supply facility that Su Lun was going to build was intended to be built in combination with the kind of Lanzhou waterwheel in the ancient world of the previous life.

With mechanical control skills, Su Lun is very familiar with the principles and manufacturing of various machines, and he plans to build three or four large Lanzhou waterwheels on the Hongsha River. Water is lifted up from the river by water trucks, and then the water is sent to the city's reservoirs through water supply canals.

The cistern must be built on a high ground, otherwise the water will not flow at all. The aqueducts outside the city were made of elevated aqueducts from ancient Rome, and in order to ensure the durability of these aqueducts, Suren deliberately used mud and stone to strengthen these aqueducts.

The aqueduct was erected from the river to the outside of the city, Su Lun thought about it, or decided to build the water storage outside the town, the main reason is the expansion of the town, now the area of the north fort of the town is not large, the distance of five hundred meters in length and width, and it is not crowded with thousands of people, but with the increase in the population of the territory, the current size is definitely not enough.

Therefore, Sulun has already planned to expand the town, and this time the expansion of the town Sulun intends to double the east, west, north, south, vertical and horizontal of the town, so that the area will become four times as before, and upgrade the town to a large town that can accommodate 5,000 people.

The length of the aqueducts from the Hongshui River to the city is more than five kilometers, and because the city is located much higher than the river, these aqueducts need to be built as elevated aqueducts.

The construction of the elevated aqueduct was very difficult, and there was no architect in the territory who could build such a large project, so Su Lun had to make a cameo in person, after all, he had been in this world for ten years and had received a proper aristocratic education, although only to observe. The education of the nobility in this world is still very strict, from etiquette, geography, horsemanship, literature, architecture, history, martial arts, etc.

At the beginning, Su Lun learned all this knowledge seriously, although he did not spend too much effort on architecture, but combined with the theory of his previous life, the establishment of an elevated aqueduct is still somewhat certain.

In order to build the aqueduct, which is about 60 centimeters wide and 50 centimeters deep, 30 meters from the highest point above the ground, and 35 meters in diameter, Suren personally led people to cut down the iron oak trees that had grown for hundreds of years near the Lotas Mountains.

The iron oak tree lives in a cold environment, the wood is hard and not easy to deform, and it is resistant to corrosion, it is not easy to burn, and it grows very slowly, and it takes at least two or three hundred years to grow to a height of forty or fifty meters.

It took a few days to cut down eight iron oaks here in the Lotas Mountains, and then Suren went back with his team, along with some of the various slaves captured here, and in order to cut down these iron oaks, Suren also led people to exterminate two tribes of gnolls.

Lanzhou big waterwheel in the previous life Su Lun saw in the waterwheel park, the first time I saw this kind of big waterwheel at close range when I felt very shocked, twenty or thirty meters high waterwheel in the water flow under the impetus of the rotation, without relying on steam and electricity, the water in the river to twenty or thirty meters.

The structure of this waterwheel is not very complicated, according to the memories of his previous life, Su Lun combined his mechanical control skills to finally build the first Lanzhou waterwheel.

The huge waterwheel stands on the Hongsha River, the turbulent water flow pushes the waterwheel to rotate, the water tank on the outer ring of the waterwheel is filled in this process, and then with the rotation of the waterwheel, it rises to a height of 30 meters, and then pours into the aqueduct, as long as the big waterwheel is not damaged, the Hongsha River is not broken, here the energy continues to transport water.

[Big waterwheel: A giant waterwheel built of iron oak wood, with an ingenious structure, strong and durable, is a very good water lifting tool, strong +10, wear-resistant +10, water lifting +10, power +15]

The elevated aqueduct was made of rock, because the height was 30 meters, so a deep foundation was dug underneath, and the construction of the elevated aqueduct also required Suren to direct himself, and there was very little adhesive used to bind the walls in this era, mostly glutinous rice juice or pozzolana cement.

Glutinous rice juice needs a lot of food, Su Lun is reluctant to waste it, and Su Lun can't afford the price of pozzolan cement transported here, so he can only work hard himself, and after each section is built, he casts a spell on these elevated aqueducts to turn mud into stone.

After the spell of turning mud into stone, these rocks will completely merge, and there will be no cracks in sight, which is better than those glutinous rice juice and cement. This effect is good or too expensive, and in Carthusian City, hiring a wizard who is proficient in turning mud into stone spells costs at least three hundred gold narls per day.

Even the nobles can't afford to pay this price, if Su Lun really has no money in the future, he can also consider acting as an architect, each time he uses mud to stone, he can turn the ten-meter-long elevated canal into rock, Su Lun has to use it more than ten times a day, and he has spent a lot of energy for this water supply system.

PS: Thank you for the 1000 starting point coin reward of the book friend of the dinner bar, thank Chang'e Jiahou Yi for the 200 starting point coin reward, thank NPC123689 the book friend for the 100 starting point coin reward, thank you Abba Abba Abba aa book friend 100 starting point coin reward.