It is very noon, the sun is very strong, and the bright light makes the soldiers on the city wall have to squint their eyes.

Outside the city wall is an arch bridge;

Below the arch bridge is a moat.

At a depth of 20 meters at the bottom of the river, the strong sunlight can only bring a little light, and it will not be completely dark.

This depth belongs to the big mouth.

Speaking of which Big Mouth is just an ordinary slobber fish, very similar to the other slobber fish in the Black Iron River.

However, it has its fortuitous encounter.

When I first entered the Divine Kingdom space, spirituality was not open. Although I felt that the swimming pool was extremely small, there were still a few of the same kind, and I was not alone.

Without food, its companion quickly couldn't hold on, one after another died. In order to survive, he had to eat his companion's carrion to maintain life.

Unfortunately, there are only a few saliva fish in the pond.

But the sky is endless fish road, just when it was about to be unable to hold on, suddenly there was an egg in the water, an egg bigger than it.

I can’t eat the eggs, but there are more things that I don’t normally have in the water, and I suddenly don’t feel hungry.

Its limited-capacity head can't describe this feeling, but it's very comfortable, warm, and not hungry.

It lasted for a while, and it even thought that this change was brought about by that mysterious egg.

Until one day, when the egg disappeared, a person suddenly appeared beside the pool, and the warm feeling did not leave it.

Next, it seems to have opened up, knowing more and more things, and its body is getting bigger and bigger.

……

gu lu lu ~

Underwater undercurrent surging

A huge Green Feather Turtle is on the bottom of the black iron river Swimming, its limbs quickly fiddled with the flowing water, chasing a group of small fish.

This group of small fish was originally a large group, and the bits and pieces have been eaten by it, and its stomach is full.

Now it can only be regarded as exercise and snacks after meals.

Suddenly, the group of small fishes in front of them turned into a bottomless tributary (the Heitie River is only five to ten meters deep).

In the face of the unfamiliar waters, Green Feather Turtle hesitated, but when it found that the group of small fish stopped swimming very far, the temptation of food still prevailed.

"I can eat them soon, and then swim back, it's okay."

This third rank Green Feather Turtle comforts itself so, and swims quickly with both hands and feet. , And spell is brewing in his mouth.

Grumbling!

A stream of water vortex was released from the mouth of the Green Feather Turtle, and a series of white bubbles were stirred up along the way, which landed in the center of the fish and exploded.

Should the fish be shrouded in the violent water shock, they fell into a coma one after another, and then were swallowed by Green Feather Turtle one by one with ease.

In the Black Iron River, which is extremely rich in aquatic resources, this is just a very common scene.

But Green Feather Turtle didn't notice that there was a huge shadow lurking in the deeper water bottom, watching the killing from beginning to end.

Just as the Green Feather Turtle swallowed the last small fish that fainted and was about to turn back and go free, suddenly a group of water vortex with a diameter of more than ten meters rose from the bottom to cover this underwater space.

Green Feather Turtle was torn to pieces by vortex before it even reacted, even the hard carapace on its back could not be preserved.

This burst of turbulent water vortex was released by the big mouth, and it is what this Green Feather Turtle taught it.

After a while, the waters returned to calm.

The big mouth opened his mouth and began to swallow the water flow. The flesh and blood fragments that had just been torn by the vortex were thrown into the big mouth abdomen by huge traction and turned into nutrients.

this move, it learned from the plankton [swallowing], it has been used very skillfully.

Big Mouth swam into the Black Iron River Basin and began its eating time.

……

Boulder Fort

Ruvid's administrative officer sat on the sofa in a precarious manner, waiting for Master Odin to meet him.

"Administrator, please drink water."

The nightingale maid, dressed in cool clothes, brought him a cup of herbal tea.

Faced with the beautiful scenery around him, Ruvid look steadily forward, nodded politely.

"Thank you!"

Half an hour later, Master Odin, who had meditated with Liz, came downstairs.

"I've been waiting for Ruvid for a long time, what's the urgent matter?"

General trivial matters can be solved through the government handbook. It is definitely not a trivial matter that Ruvid can come in person.

"My lord, it’s not an urgent matter, but this incident threatens the cultivation of cultivated land in the coming year. The situation is like this..."

In fact, what Ruvid said, The clues were revealed last summer, and that was the rising water level of the Hei Tie River every year.

The rising water level of Heitie River will not affect the residents, but it is extremely threatening to the farmland with dense water channels.

The height of the arable land is fixed. If the water level rises, it will overflow into the field and drown the crops.

Although it can last a year by repairing the canal this year, it won’t work next year.

In order to avoid the possible floods next year, it is natural to make preparations in advance.

The rise of the river's water level is force majeure in Ruvid's view. His limited management experience cannot solve such a problem, so he came.

"The rise in the water level means that the amount of water increases. The occasional increase can be explained by rain, but the increase over the years cannot be justified."

Master Odin fiddled with the map and thought Going back to the upper reaches of the Black Iron River to find the root cause, it has always been his style to deal with problems from the root.

But when he looked at a dark map, he found that it was still unknown.

The blue lines of the Black Iron River lead to the deepest part of the endless mountain range, even beyond the boundary delineated by the boulder collar.

The map is beyond this range, and even the blue line representing the Black Iron River cannot be displayed, and it is completely hidden into the darkness.

pa!

The light curtain is turned off.

He directly gave up starting from this source because he hadn't lived enough yet.

Since the source of the problem cannot be solved, solve the problem.

The first method is to dig deep river channels to lower the water level flowing through the cultivated land to achieve the purpose of preserving the canals.

This is the most direct method, but the operation is too difficult to send people down to the bottom of the river to dig.

The key is that the river from the gravel ridge to the lower reaches of the cultivated land is more than ten kilometers long.

For the current Boulder Neck, it is an impossible task.

The second method is to sacrifice a part of the cultivated land close to the Heitie River, excavate a huge lake to accommodate the river's water and ease the water level, and the excavated soil is used to fill up another part of the cultivated land nearby.

In simple terms, it means to abandon a few cultivated land and preserve most of the cultivated land.

This method has a certain degree of operability. Although the amount of work is much larger than that of digging a deep river, the dry land can be carried out by hand and foot construction, and it must be completed in one breath.

The giant lake relies on the direction of the river to be in a belt shape, which can be divided into several areas and completed in several years. After all, the river is slowly rising.

According to previous knowledge, Odin knows that the giant lake has a strong ability to regulate the Water Element. Once the project is completed, the cultivated land can be kept safe for decades.

Apart from this, lakes are also excellent aquaculture resources, and part of the arable land that is essentially lost is made up for by another resource.

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