3. The utilization direction of unconventional water sources in China mainly includes ().

The utilization direction of unconventional water sources in China mainly includes landscape water, industrial water, agricultural water and groundwater recharge. In China, more and more attention has been paid to the utilization direction of unconventional water sources. Unconventional water source refers to the water source obtained by various artificial means or other means besides the traditional natural water source. The use directions of the above types are described in detail below:

1. Landscape water

With the acceleration of urbanization, the demand for water in parks, gardens, green belts and other landscape environments in cities is increasing. At this time, unconventional water sources can be used to supplement, such as rainwater collection and utilization, sewage treatment and reuse, which can not only meet the demand for landscape water, but also save the use of natural water sources.

2. Industrial water use

There is also a great demand for industrial water in China, but the traditional natural water source is not enough to meet the industrial demand. Therefore, unconventional water sources, such as surface water and groundwater, can be used to supplement, which can not only meet the demand of industrial water, but also reduce the pressure of natural water sources.

3. Agricultural water use

Agricultural water is an important part of water resources utilization in China, but traditional natural water sources can no longer meet the demand of agricultural water. Therefore, unconventional water sources can be used to supplement, such as groundwater recharge and reuse after sewage treatment, which can not only meet the agricultural water demand, but also improve the utilization efficiency of water resources.

4. Groundwater recharge

Groundwater recharge is a method of injecting groundwater into groundwater layer to increase groundwater resources. This method can not only increase the amount of groundwater resources, but also prevent the excessive decline of groundwater and avoid problems such as ground collapse caused by over-exploitation of groundwater. At the same time, this method can also effectively use the water resources after sewage treatment.

To sum up, the utilization direction of unconventional water sources in China mainly includes landscape water, industrial water, agricultural water and groundwater recharge. The application of these utilization modes can not only meet all kinds of water demand, but also improve the utilization efficiency of water resources and promote sustainable development.