How do humans control water use?

Human water control is to build reservoirs, dams, channels and so on.

Human beings have a long history of water control. Since ancient times, China has said that "water conservancy can do everything", which reflects human's understanding of the importance of water. In agricultural society, human beings began to build reservoirs, dams, channels and so on. Adjust water level to ensure farmland irrigation. Large-scale water conservancy projects in ancient China, such as Dujiangyan and Lingqu, are still playing a role.

In industrial society, human beings have a greater demand for water resources, not only for production, but also for domestic use. As a result, humans began to build water plants to treat water to meet drinking standards. At the same time, a drainage system was built to discharge domestic sewage and industrial wastewater. In the process of urbanization, human beings manage water resources more carefully. By building reservoirs, water plants, drainage systems, etc. It can realize the rational distribution and management of urban water use. In addition, through water-saving technology, the waste of water is reduced and the utilization rate of water is improved.

The importance of water resources

The importance of water resources is self-evident, and it plays a vital role in human society and the earth's ecological environment. First of all, water is the source of life, and human beings and all living things need water to maintain life. Without water, all life cannot exist. Water resources are very important for agricultural production. Water is a necessary condition for crop growth. Water shortage will lead to crop yield reduction or even crop failure, thus affecting national food security. In addition, water is also very important for agricultural production fields such as animal husbandry and fishery.

Water resources are also essential for industrial production. Both traditional industries and modern science and technology industries need a lot of water resources for production and manufacturing. The shortage of water resources will restrict industrial development and affect the national economic strength. Water resources are also of great significance for protecting the ecological environment. Water is one of the most important circulating substances on the earth, which plays an important role in maintaining the ecological balance of the earth and maintaining climate stability.