If the urban water supply is still functioning smoothly, Chen Xin could figure out a way to connect a pipe from his original home to the shelter to fill up the water tank. When building the shelter before, he used the construction team to connect a long pipe to fill water like this.
But now, on one hand, the construction team has left, and Chen Xin doesn't have a long enough water pipe. On the other hand, Chen Xin is not sure if the water supply is still available.
In the month since the meteor impact, the Earth's surface has been almost completely covered by fire and high temperatures, and occasionally meteors fall. Whether the water plant can survive such a disaster is a cause for concern.
Moreover, even if the water plant can survive, the government is maintaining the operation of the water plant to ensure the water supply for the shelter facilities, but how can Chen Xin get the tap water into the shelter's water tank?
Use a water pipe? Chen Xin doesn't have such a long water pipe, all he has are a bunch of 1.5-liter mineral water bottles.
Some might suggest just using mineral water bottles to fill up, just fill a few more bottles!
That's all well and good, but before using the mineral water bottles to fill water, let's simply explain the relationship between the volume and weight of water, which is the density of water.
Pure water should have a density of 1 under standard conditions, meaning one liter of water weighs one kilogram, and one ton of water is a cubic meter.
Chen Xin's water tank can hold three tons of water, which means three cubic meters. He has 30 mineral water bottles of 1.5 liters each, which means if all are filled, they can carry 45 liters, approximately 90 pounds of water, about the weight of a girlfriend.
Without considering Chen Xin's stamina or time, how many round trips are needed to fill the water tank?
It's not a difficult problem; a first-grade elementary school student who knows addition, subtraction, multiplication, and division can solve it.
A water tank with a total capacity of three tons, converted to liters it's three thousand liters, Chen Xin can carry 45 liters at a time. A simple division and round-off calculation tell us that Chen Xin would need at least 67 round trips to fill his water tank.
This is not a number that one can feel at ease with, who could carry their girlfriend back and forth sixty-something times in one go?
If it were ten or eight times, Chen Xin wouldn't consider it, he'd just go out, find a faucet, or a clean water source that can still be used, fill it up and be done with it.
But sixty-seven times, this really leaves Chen Xin with no desire to act.
He might consider refilling several times, but first, Chen Xin needs to find a stable water source.
So at this time, he should consider the second plan, use the system to upgrade the shelter's water circulation system, to see if a solution can be found.
The reason this plan was not considered initially is still because the system cannot produce something from nothing, it must upgrade from existing things.
Chen Xin's shelter itself doesn't have a water source, whether it's external tap water or internally drilling a well, these were not prepared when the shelter was built.
Chen Xin did consider drilling a well for the shelter back then, so even if the reserved pure water was used up, he could acquire new freshwater resources.
However, when the shelter was being built, the construction team Chen Xin hired didn't have well-drilling equipment, and he couldn't find a construction team that could drill a well.
The city Chen Xin is in is located in the south of Flame Country, close to the great marsh, and underground water resources are very abundant. In the past, rural areas indeed had many hand-pumped wells.
But during the previous construction, due to schedule issues and not contacting a construction team, even though Chen Xin really wanted to drill a well for his shelter, he had to give up this idea.
Now that Chen Xin wants to upgrade the shelter's water supply system, whether there will be an upgrade plan for extracting groundwater is something Chen Yu is unsure of.
However, thinking about having to go outside to fetch water 67 times, Chen Xin can only gamble on whether the system upgrade plan contains what he needs.
Fortunately, this survival system he stumbled upon did not disappoint Chen Xin.
"Water-scarce water supply system"
"Upgrade plan one: Upgrade the material of the water supply system pipes, enhance the wastewater recovery and recycling efficiency, water tank capacity + 2 cubic meters, reclaimed water quality +1, upgrade requires 500 survival points"
"Upgrade plan two: Upgrade the material of the water supply system pipes, enhance the efficiency of the water circulation recovery system, add a water pump, water tank capacity + 5 cubic meters, upgrade requires 300 survival points"
"Note: The water pump has a lift of 50 meters. This pump is used solely for water extraction. If there is no groundwater layer within 50 meters from the shelter, groundwater cannot be obtained."
Seeing the water pump appearing in the upgrade plan, Chen Xin let out a sigh of relief, as for upgrade plan two's remark, Chen Xin only glanced at it and didn't care.
This is, after all, the south of Flame Country, known as the Jiangnan water town, this city is right next to Yunmeng marsh, where the underground water is exceptionally abundant. When Chen Xin built the shelter, he specifically considered waterproofing and avoiding hitting groundwater.
As for whether there is groundwater 50 meters below, this is something Chen Xin doesn't need to worry about at all, because where Chen Xin used to live, there was previously a hand-pumped well, although now it's abandoned.
Chen Xin didn't think much about it and directly used the survival points accumulated over the month to proceed with the upgrade of plan two.
The grid-like light of the upgrade appeared in the shelter again, but this time it covered the water supply system.
And Chen Xin once again witnessed the power and magic of the system, because during the upgrade process just now, Chen Xin personally saw a pump take shape from the grid-like light and solidify before his eyes.
Seeing the water pump appear, Chen Xin didn't care to marvel at the system's magic, checked the pump's wiring, went to the electrical room to look at the switch, and then turned on the pump's power to start its work.
This is a very small pump, not very powerful, but when it starts working, it emits a buzzing noise.
The noise from the pump is somewhat noisy, compared to the generator next to it, it seems like a noisy brat. But at this moment, Chen Xin stared nervously at this "brat", hoping to hear the sound of water flow from the machine's roar.
Even though he knew there was groundwater underneath, Chen Xin was still a bit nervous, what if the water layer was a bit deeper?
However, the "brat" didn't keep Chen Xin waiting long. Just when Chen Xin was pondering what to do if no water could be pumped up, the sound of rushing water finally echoed inside the pump, and quickly the pump's operating noise deepened, and the sound of water could also be heard coming from the by-now doubled-in-size, wall-embedded water tank.
Water has been pumped up.