After completing all the procedures, early the next morning, the Provincial Institute of Archaeology dispatched more than 20 elites from the institute to take a bus with Professor Chen and his entourage. On the way, Zheng Suo took out a few drawn maps of the underwater tombs and discussed with Professor Chen to see how to proceed next. After reading a few drawings, Professor Chen wondered, "Why is there a waterfall on this side?" ”

"Yes, there is a waterfall a few dozen meters away, and the water of the waterfall flows directly into the lake."

"Are the directions on the map accurate?"

"That's for sure, and we were shocked when we saw the result."

"Oh, what do you mean by shock?"

"The waterfall sits west and faces east, the entrance of the ancient tomb is also facing east, the mountain on the side is C-shaped, high on both sides, low in the middle, the waterfall is on the low position in the middle, the water is discharged from the waterfall behind the ancient tomb, at that time we had a section chief who has studied the Book of Changes and said, this is the habitat of the phoenix, and it is also a place of gathering qi, and coincidentally there is a village called Phoenix Village on this side, and the mountain where the waterfall is located is called Phoenix Mountain."

"Oh. This is interesting, Phoenix Mountain plus Phoenix Village, and Phoenix Feng Shui, it seems that there is a story in it. ”

"Yes, there has been a legend here, when an emperor in the Northern Zhou Dynasty went south, he met a woman, the woman Wen Tao Wuluo, soon got the emperor's favor, because of the misfortune encountered during the play, the emperor was particularly uncomfortable, so he ordered people to be buried by the water according to her preferences before her death, and then the emperor said that the woman gave him a dream, saying that he liked to be underwater, so he responded to her idea, and made a tomb under water, and named her a concubine."

"The territory of the Northern Zhou Dynasty did not completely involve this, which is somewhat contradictory, so this legend has a lot of moisture."

"Yes, the legend is exaggerated a lot of times, hehe, maybe it's just a prince's relationship."

After arriving at the scene, everyone was excited, this is a very large scenic spot, the waterfall not far in front is constantly pouring down silver filaments, the lake is sparkling in the breeze and gentle sunshine, such a natural beauty of living mountains and waters, it is simply a paradise on earth. There is a barge parked on a wharf not far from the scenic spot, which is according to Situ Fang's requirements, and the U-shaped frame that was made overtime last night was put here, and it will be hoisted underwater for installation after waiting for the boat crane to come.

After everyone took all the equipment and luggage to the ship, the boat sailed away from the dock and quickly reached anchor above the designated place. Situ Fang checked the diving equipment again, and after putting it on with the two people, he went into the water to investigate the water situation.

When I got underwater, I realized that the water situation here was really complicated. Several turbulent currents were mixed together, one taking them to the left, the other pulling them to the right, and they couldn't stop at all. Situ Fang used the flow meter to make several measurements and judged that this phenomenon was not simply affected by the impact of the waterfall flow, and it felt like there was a dark river pumping water elsewhere below, which produced a strong suction.

After Situ Fang and the three of them worked hard to reach the entrance of the ancient tomb, they roughly compared the dimensions, and then surfaced on the boat and went on the boat.

He took off the respirator and said to Professor Chen: "Professor, the water situation below is complicated, there is obvious turbulence, there may be a hole below to lead to a dark river, first wait for the U-shaped frame to go down and then we will go down, otherwise it will not be stable at all." ”

"Oh, what's complicated?"

"When I came to the entrance of the ancient tomb, there was a stream of water from the west side, which should be formed by the impact of the waterfall, and the flow rate was 0.3 m/s, which was normal, but I don't know where from the northeast direction, there was also a stream of water, the flow rate was very strong, 2.5 meters per second, and the strange thing was that there was also a stream of water from the south, which was stronger than the water flow in the northeast direction, reaching 3 m/s, and these streams of water converged together to the front of the entrance of the ancient tomb, and there was an underwater cliff, where a vortex was formed, and then it disappeared."

"Do you see the entrance?"

"See, it's a stone gate about 3 meters high and 2 meters wide at the root of the mountain."

"What's the neighborhood like?"

"Nothing special, the entrance to the ancient tomb is on the gentle slope of the mountain root, and less than 5 meters from this entrance is the place where the underwater cliffs and turbulence converge."

"The water situation below is so complicated, so how can the U-shaped insulated wall be fixed?"

"That's easy to do, after punching a few holes, make a support on it for welding, this technology is not difficult, just leave it to them."

Professor Chen communicated this discovery with Zheng Suoyi, and then he communicated with the personnel in charge of construction, and the conclusion was that they would install a drilling rig on the barge for a while, and then hoist the U-shaped baffle after drilling the rock below through the drilling rig, and it would take time for the drilling rig to be transferred, and it would not be sent over until the afternoon, and the formal construction would take until the evening, and they would work overtime at night to ensure that all the installations were completed.

Seeing that the communication between Professor Chen and Zheng Suo had come to an end for the time being, Zhang Gong, who had been looking at the lake and was distracted, suddenly turned around and asked Zheng Suo: "Since there is an undercurrent under this lake, it means that there is an underground dark river, where does the lake water flow out normally?" ”

"The lake is connected to several rivers, and because of the obvious difference in water levels, the water level is controlled by a dam to the south, and there is a small hydropower station behind the waterfall, which was built in the 70s and has been responsible for generating electricity and regulating the water level until now."

"Oh, so the hydropower plant is still running?"

"This is not clear, is it related? If so, I'll ask right away. ”

"I can't be sure about this now, but I suspect that the basic condition for the generation of water at the bottom of the lake is that the water must be moved, and there is no river nearby, and when you just said that there is a hydropower station behind the waterfall, I thought, is the reason for the formation of the water flow below is that the pipe formed through the cracks in the mountain, and it is a shortcut to the hydropower station?"

"This possibility is really not small, if there is no underground dark river, where does the water come from, you reminded me of this, I will ask now."

After saying that, Zheng immediately made a phone call and asked about the operation of the small hydropower station, and after a few minutes they got a reply: the hydropower station was operating normally and was generating electricity.

Zhang Gong smiled slightly when he heard the news, everything was expected. Subsequently, he asked Zheng to coordinate and temporarily cut off the water source of the hydropower station, and after cutting off the water source, he asked Situ Fang to take people to dive down to the mouth of the ancient tomb to measure the flow rate, so as to verify the correctness of his analysis. Ten minutes later, Situ Fang surfaced and said: "The current is normal, the undercurrent has basically disappeared, and the flow rate is now 0.3 meters per second." ”

"Good! Lao Chen, now let's hurry into the water and see the true face of this underwater tomb! ”