Present situation of water resources in China.

China is a country with severe drought and water shortage. China's total freshwater resources are 2.8 trillion cubic meters, accounting for 6% of the world's water resources, ranking fourth in the world after Brazil, Russia and Canada.

China's per capita water resources are only 2,300 cubic meters, which is only 1/4 of the world average, and it is one of the poorest countries in the world. However, China is the country with the largest water consumption in the world. In 2002 alone, the national fresh water consumption reached 549.7 billion cubic meters, accounting for about 13% of the world's annual consumption, and about 1.2 times of the 470 billion cubic meters of fresh water supply in the United States.

Utilization ratio of world water resources

At present, the world's fresh water resources only account for 2. 5%, of which more than 70% is frozen in the Antarctic and Arctic ice sheets, and 86% of fresh water resources are difficult to use, plus alpine glaciers and permafrost snow that are difficult to use.

The fresh water resources that human beings can really use are part of rivers, lakes and groundwater, accounting for only 0.26% of the total water volume of the earth. At present, there are 1/6 people in the world, and about 1 100 million people are short of water. Experts estimate that by 2025, the world's water shortage population will exceed 2.5 billion.