What is the current state of the world s water resources? The distribution and status of the world s

The Earth's water resources, broadly speaking, refer to the total amount of water in the hydrosphere.

Seawater is brackish water and cannot be used directly, so the water resources commonly referred to mainly refer to freshwater resources on land, such as river water, fresh water, lake water, groundwater and glaciers. Freshwater resources on land account for only the total amount of water on Earth, and most of them (nearly 70 percent) are solid glaciers, i.e. mountain glaciers in the polar regions and in the middle and low latitudes, which are difficult to exploit. At present, the freshwater resources that are relatively easy for human beings to use are mainly river water, freshwater lake water, and shallow groundwater, and the reserves account for about 7/100,000 of the world's total freshwater reserves.

According to research, from the perspective of the water cycle, about 9,000 kilometres of freshwater resources are actually used efficiently in the world per year3.

Generally speaking, areas with abundant precipitation have abundant water resources; Areas with low precipitation are poor in water resources. It reflects the abundance of water resources in a country or region, and is usually based on the total annual average runoff and per capita share. Total river runoff worldwide is 47,000 km3, with a per capita average of about 9,000 m3.

The total amount of river runoff in China is about 2,700 billion m3, and the average per capita share is about 2,400 m3, which is much lower than the per capita share of the world.

Our country is a country with severe water shortages. The total amount of freshwater resources is 2.8 trillion cubic meters, accounting for 6 of the world's water resources, second only to Brazil, Russia and Canada, ranking fourth in the world, but only 2,300 cubic meters per capita, only 1 4 of the world average, 1 5 of the United States, ranking 121st in the world, and one of the 13 countries with the poorest per capita water resources in the world.

The world's water resources are mainly distributed in the polar regions, and the current situation is a lack of water resources.

The distribution of the world's water resources is a picture of the distribution of water sources on the planet. The reserves of freshwater resources on land only account for the total amount of water bodies on the earth, and solid glaciers account for about the total reserves of freshwater. It is mainly distributed in the polar regions, and it is difficult to take advantage of the technological level of human beings.

Freshwater bodies in liquid form, most of which are deep groundwater, are exploited and utilized very little.

In terms of the distribution of water resources on all continents, Asia has the largest annual runoff, followed by South America, North America, Africa, Europe, and Oceania. From the perspective of per capita runoff, the total amount of river runoff in the world is about 10,000 cubic meters per person. Unfortunately, years of drought and severe weather around the world have led to the loss of water resources, and more and more countries are now worried about water.

How to conserve water resources

1. Reduce pollution: Reducing pollution is the key to protecting water resources. Pollution is one of the main causes of water problems, and there are a number of measures that can be taken to reduce pollution, such as limiting the use of chemicals, properly disposing of wastewater, and avoiding dumping garbage near water sources such as rivers and lakes.

2. Improve water use efficiency: We can take some measures to improve water use efficiency, such as building more efficient irrigation systems and water-saving equipment, and reducing water waste in agriculture, industry and households.

3. Promote awareness of water conservation: Education and publicity are also very important. We need to spread awareness of water conservation through various channels, such as **, education and awareness campaigns, and encourage people to take positive actions to protect our water resources.

In general, China is a country with severe drought and water shortage. The total amount of freshwater resources is 2.8 trillion cubic meters, accounting for 6 of the world's water resources, second only to Brazil, Russia and Canada, ranking fourth in the world, but only 2,200 cubic meters per capita, only 1 4 of the world average, 1 5 of the United States, is one of the 13 countries with the poorest per capita water resources in the world.

Current situation: water shortage, serious water pollution, serious soil erosion, serious low water price, serious waste of water resources.

There is more water in the south and less water in the north.

There is less water in the west and more water in the coast.

This year's situation: The United Nations has set the theme of this year's "World Water Day" as "Clean Water, Healthy World", and the theme of China's commemoration of "World Water Day" and the launch of "China Water Week" is "Strict Water Resources Management and Sustainable Development".

Solving our country's increasingly complex water problems.

The first is to implement total water use control and promote the sustainable use of water resources.

The second is to build a water-saving society and improve the efficiency and effectiveness of water use.

The third is to strengthen the management of water function zones to meet the standards and effectively protect water resources.

Fourth, promote the connection of rivers and lakes and enhance the capacity of water resource allocation.

Fifth, we should strengthen the scientific scheduling of projects and improve the level of water resources security.

Sixth, we should do a good job in the management of water shorelines and promote the restoration of aquatic ecosystems.

Seventh, it is necessary to strengthen the unified management of water resources and promote the reform of the water management system.

Eighth, consolidate the foundation of industry management and improve the level of water resources management.