The rising sun shines in the rolling flood.

Tens of thousands of zombies in the flood rose and fell with the waves.

In the buffer city, tens of thousands of workers dismantled the scaffolding and cleared the items on the fence.

Thousands of members of the Minwu Department took the ultraviolet lights off the city wall, and the wires were also wrapped in circles and put them back on the truck together with the ultraviolet lights.

synchronous.

A large number of trucks loaded the earthen bags that had been prepared to fill the walls and transported them to the walls of the buffer city.

What they call Plan B.

In fact, it is similar to the method of filling dams with sandbags in the Northwest base.

Only this method is the most effective to prevent floods in a short period of time.

And it's the easiest.

However, the soil in the northwest is mainly sandy, and it is extremely effective to dig sand to make sand bags for flood control.

Sandbags are often used in flood control.

but.

In the oil city, the main soil is mostly acidic yellow-brown soil.

The flood control effect of soil bags is not as good as that of sand bags.

First.

Low flow resistance: The bag has weak flow resistance and is only suitable for situations where water flow is small.

second.

Poor waterproofness: The sealing properties of the soil in the bag are not as good as those of other cofferdam materials, so it is difficult to achieve complete waterproofing.

Generally speaking, sandbags and earthbags also have different usage scenarios and uses.

Because of its good waterproofing performance, sandbags are often used in flood control, breakwater and other projects to prevent water flow from erosion.

Soil bags are more used for soil preservation, temporary soil accumulation and other operations.

In scenarios where moisture needs to be dealt with, such as flood-prone areas, sandbags are more common.

The Plan B of the Oil City is actually adapting to local conditions.

Steel sheet piles are welded on the fence at intervals. On the outermost side of the impact flood, steel plates are welded to block the rear.

In the gaps in the partition, earth and stone bags or earth sand bags are used to fill the space in the middle and compact the wall.

It consumes sand and steel bars, which were originally used to build concrete walls.

There is no way to do this.

They don't have that much sand and can't make so many sandbags to resist floods.

Only this method can be used.

The reason why they waited until now to implement Plan B was because they used the materials originally used to build concrete walls. They thought they could try not to use them as much as possible.

At this moment, there is no other way.

Plan B started preparations two days ago, so after they started, they moved very quickly.

Quickly remove the scaffolding and transport the earth and stone bags of vehicles.

After the items on the fence are emptied, the welding personnel will carry the steel plates on the fence and weld the steel plates on the fence.

......

On the ground of the buffer city.

Ding Jiu sat on an armored vehicle and patrolled the city.

"Old answer, have all the relevant arrangements been arranged?"

"It has been arranged." Xie Changshan replied.

When he answered this sentence, he always felt strange.

Maybe it was because he was the person in charge of the Oil City before, and he often talked to others like this.

But now that Ding Jiu, the chief engineer of the Dazhangshu Base, has arrived, he is about to listen to General Manager Ding.

Of course I feel a little strange.

After driving around the south gate, Ding Jiu got out of the car and walked towards the wall with Jie Changshan.

This kind of project to solidify the dam is simply the easiest for professional engineers like them.

However, it is a heavy task to mobilize tens of thousands of people to build dams.

The sun is gradually rising, and the outdoor temperature is also rising.

The increase in the flood level line accelerates, and the entire buffer city wall sounds like electric welding

Bags of earth and rock were transported to the wall to fill the gaps in the middle of the steel plate.

Xie Changshan looked at these steel sheet piles and said to Ding Jiu:

"Mr. Ding, the steel plates behind us can also be made with machinery, and they can still be used later."

"Well, sand and stone are actually OK, and you need to use a filter to process it." Ding Jiu replied.

"Although it will be a bit of a loss, it's not bad."

Just as the two were chatting, Ding Jiu suddenly saw the cross helicopter flying from the south.

As the helicopters got closer, they could even see the big camphor tree logo on the helicopter.

Xie Changshan looked at the flying helicopter and asked:

"Is the city lord here again? I haven't received any news that the city lord came to the oil city..."

"It shouldn't be."

Ding Jiu looked around, shook his head and whispered:

"The oil city has a lot less grain inventory. Now a large amount of points are distributed, and the exchange volume is not proportional. In order to avoid the run, some grain is sent from the headquarters base."

"Ah? Is there something wrong with the oil city's grain now?" Xie Changshan asked in surprise.

Ding Jiu glared at him.

Xie Changshan also knew that he didn't dare to speak so loudly, so he quickly whispered: "Sorry, I'm mainly too surprised."

Ding Jiu sighed and said:

"It's not a crisis either. The current food reserves in the oil city can support more than a month..."

"But, in more than a month, the grain in the greenhouse cannot be harvested..."

"It will take at least two months to start harvesting the greenhouses in the Buffer City. In order to avoid the problem of food shortage in a month, it can only be transported through the headquarters base now."

“More than a month…”

Xie Changshan murmured:

"For more than a month, the flood is probably gone. Why don't you wait anymore and transport it by land after more than a month? As far as I know, the cost of air transport is too high, and the food transported is relatively small."

"It's not worth it at all!"

Ding Jiu said:

"What if it rains later? No one can understand the current ghost weather. If it is sunny, it will be clear. If it is snowing, it will be snowing. In order to avoid the food crisis, the city lord and the others will naturally prepare in advance."

"So that's it." Xie Changshan nodded.

Suddenly, he remembered something again.

Asked:

"What's going on in the headquarters base now? The headquarters base is located in the south, and the temperature rises faster. Will it affect the buffer city...

Logically speaking, the headquarters base should be hit harder by the flood, but I have not received any floods from the headquarters base..."

Ding Jiu said with a smile:

"You're wrong."

"Where is our Dazhangshu base? It's in southern Jiangxi.

There are mountain hills and hills there, and many small basins are formed under the surrounding mountain hills. The snow on the mountain melts, forming lakes of all sizes, and it is impossible to concentrate on forming super floods.

You can understand it as: the basin among the mountains becomes a lake, and the lake water level does not flow into other places as long as the lake does not exceed the ridge.

Generally speaking, places where floods cause serious disasters are in plain areas.

This mountainous and hilly landform cannot form a particularly large flood disaster."

Ding Jiu paused for a few seconds.

He continued:

"However, the terrain in the west of the Dazhangshu Base is relatively low, so the water level line there will be relatively high. However, the source of floods in the west of the Dazhangshu Base is only formed by snow on the surrounding mountains, so the water volume is limited.

Moreover, the overall location of the headquarters base is relatively high relative to the surrounding area.

The flood was not that serious, but the western section of the wall was relatively low, and water was sprayed out of the sewer, but with Fusheng and they should have solved it...."

After listening to Ding Jiu's explanation, Jie Changshan breathed a sigh of relief.

"So that's it, I'm not worried now."

.........
Chapter completed!