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Pit has long been one of the most important objects in human life. In ancient times, for military and defensive purposes, pits were usually dug in the ground to build fortifications, trenches and clan graves. In addition, because of its large capacity, many pits are also used to store dry food, water and fuel to avoid floods or serve as a refuge in natural disasters or emergencies.

In the geological environment, when the ground surface is weathered, it can cause the formation of land depressions, caves, gullies and various pits, which are called weathering pits. In addition, the pit may also be formed by other external factors such as ground subsidence due to underground mining of ore and erosion caused by rainwater.

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In modern technology, the most common pitting can still be found in agricultural tillage. The utilization of pits can make the continuous shifting of crop planting, maintain the fertility of land, and remove the drainage of soil moisture to make the soil more loose and flowery. As for fish farming, it can also help in adjusting the size of the breeding pond and its depth to create a suitable spawning environment.

Generally speaking, pit is one of the most common naturally formed and man-made structures in the environment. It is a very helpful object and plays an important role in many areas. Therefore, we should actively carry out scientific research on the formation, structure, hydrological characteristics and ecological environment of the pit, so as to improve its scientific application in various fields in the future.