Li Rong and Peng Jian continued to explore various rivers. They arrived at the north of Tengcheng. The rocks in front are lifted up bit by bit. There is a long slope between the two mountains. It's like two mountains forming a huge palace, and you can enter the palace through this slope. The mountains are rugged and very steep. Near this rocky area, the hillside does not rise slowly, but suddenly rises.
Walk up the hillside. There are no artificial steps, they are all natural soil with some large stones scattered on them. There is some water flowing down the hillside on the road, and it becomes drier as you go up. At first, the nearby mountains blocked the sunlight, and the whistling wind blew through, making it quite cold. Going up further, the dazzling sunlight is revealed. There are long wild grasses beside it. There are some yellow wild flowers in the grass. The grasses become sparse the higher you go up. On a raised flat land next to it, I saw some huge rocks. You can rest for a while on the rocks. Look far away from this flat land. You can see the lake and grassland in the city in the distance.
There is drought in the north of Tengcheng and waterlogging in the south.
Climb up the hillside and move forward, you will see a river in the north of Tengcheng. In this dry season, almost all the water originally flowing in the river has been exhausted. Only winding, silty river channels were left meandering in the wilderness. There are patches of dry land on both sides of the river. Many small cracks have been cracked by the sun, and some fine sand comes out from time to time. Over time, the fine sand between these cracks gradually erodes the river channel, making it more uneven.
There is a lot of silt and stinky water deposited at the bottom of the river, giving off a suffocating smell. Occasionally, you can still see the remaining weeds and dry shrubs on the cracked river bank, which make a sad sound when the wind blows. This once vibrant river has become the obstacle that travelers most want to bypass when walking, and it seems that it will remain silent for a long time.
Peng Jian said: "Are you going to pass by here?"
Guan Lirong said: "Yes, you can't get through other places either."
Peng Jian said: "We can only walk there. There is no road."
Guan Lirong said: "Yes, it's quite difficult to walk."
"This time we are mainly building a flood monitoring and analysis system. Embedded systems will be used in some places."
To control flooded areas, common water conservancy projects include the following: River regulation. Embankment construction. Reservoir construction. Channel construction.
To control arid areas, common water conservancy projects include the following: Reservoir construction. Water diversion project. Construction of pumping wells and pumping stations. Construction of sprinkler and drip irrigation systems.
Sensor networks need to be used to monitor water level, rainfall, water velocity and other data at key locations. Embedded systems can collect and analyze these data in real time, and send early warning information to relevant departments and residents through connected communication devices. Early warning information can predict the occurrence and scale of floods in advance so that early emergency measures can be taken.
Embedded systems can cooperate with monitoring equipment, positioning systems and communication networks to track the progress and disaster of floods in real time so that disaster response agencies can carry out rescue and assistance work. Embedded systems can coordinate various resources, optimize rescue paths, allocate manpower and material resources, and improve rescue efficiency.
With the help of embedded systems, intelligent control and automatic scheduling of infrastructure such as drainage systems, dams, and pumping stations can be achieved. This allows for more precise regulation of water flow, mitigating the effects of flooding and protecting life and property.
Flood-related data collected through embedded systems can be used to build predictive models and data analysis to reveal flood patterns and trends. This allows the likely location and scale of flooding to be predicted in advance, allowing appropriate pre-disaster preparedness measures to be taken.
The embedded system here is used to monitor disaster conditions caused by floods and record relevant data for post-disaster assessment and reconstruction work. Also assists with resource management and distribution of supplies, as well as monitoring and managing recovery progress.
They looked around and saw that near the dry land, the water flow of the past had disappeared, replaced by a dry riverbed that was burnt. In the center of the river, a deep ravine runs through the entire river bed. This gully has a zigzag shape, sometimes extending eastward and sometimes curving westward. There are many small deep grooves under the gully, making the entire river channel intricate.
Looking into the distance, there is flat and dry land on both sides of the river, with few traces of vegetation growing. There are some broken stones on the edge of the river, which have been worn away by time and wind and frost.
Occasionally, I feel the breeze blowing through the dry river, carrying the smell of sand and scorched earth, giving people a sense of vicissitudes and desolation. Under the sun, the ground on the river reflects dazzling light, giving people an endless feeling of heat.
However, the ravines extending in all directions are like an invisible vein, connecting the distant land, and still have a kind of vitality and vitality.
Deep ravines and dry riverbeds are also reminders of the land's former prosperity. Perhaps one day, the water will flow again and this dry river will be filled with new life.
They walked down and walked along the river bed for a while, and saw a hole in the ground.
Walk along the entrance of the cave, and there are winding passages below.
Peng Jian said: "What else is in front of this?"
Guan Lirong said: "How come there are still these passages?"
Peng Jian said: "It's like a trench."
Guan Lirong said: "Maybe it was formed naturally. It was corroded by something, and the bottom became hollow."
There are several factors that can cause cavities to form beneath the earth. One of the more common situations is groundwater erosion. When a certain amount of acidic substances, such as carbon dioxide and sulfuric acid, are dissolved in groundwater, they may react chemically with minerals in the soil, causing the soil to gradually dissolve and form cavities.
Another scenario is the dissolution of underground rocks. Some soluble rocks, such as gypsum or rock salt, are easily eroded by water and cause dissolution, thus forming cavities. This phenomenon is particularly common in karst areas, such as karst landforms.
In addition to the above, there are other factors, such as drying and shrinkage of soil caused by falling groundwater levels, collapse of underground caves, etc., which may also lead to the formation of cavities under the land.
Guan Lirong said: "The geology here is not like the geology of underground caves, it is not soluble rock."
Peng Jian said: "Do you think there will be so much acidic material that will cause it to corrode?"
Guan Lirong said: "Are you saying this was done by humans?"
Peng Jian said: "Then what's the use?"
Guan Lirong said: "There are many potholes down there, let's go down and look for them."
After walking along the pothole for a while, I didn't find anything special. But saw some mineral transport devices.
Guan Lilong said: "I don't know what kind of mineral it is, but I thought, if there is acidic material, is it related to these mineral materials?"
For example, one of the most important uses of hydrochloric acid is in pickling steel. Before subsequent processing of iron or steel (extrusion, rolling, galvanizing, etc.), hydrochloric acid can be used to react away rust or iron oxides on the surface. Hydrochloric acid solution with a concentration of 18% is usually used as a pickling agent to clean carbon steel.
The pickling steel industry has developed hydrochloric acid regeneration processes, such as spray roasting furnaces or fluidized bed hydrochloric acid regeneration processes. These processes allow hydrogen chloride gas to be regenerated from the pickling liquor. Dissolve the hydrogen chloride gas produced in water to obtain hydrochloric acid. By recycling waste acid, a closed acid cycle can be established.
Peng Jian said: "Maybe it was once used as a mineral refining site."
