World Water Resources Overview, Water Resources Rankings of Countries in the World

In order of water resources, the top few are: Brazil, Russia, Canada, the United States, and Indonesia.

China, India. If averaged over the population, it's a different result. The per capita water resources of Chinese are equivalent to 1 4 of the world's per capita resources.

Water is one of the most abundant chemical compounds on Earth. About three-quarters of the world's area is covered with water, and the total volume of water on Earth is about 1,386 million cubic kilometers, of which it is distributed in the oceans, and only about 3,500 kilometers of freshwater. If you exclude the inaccessible glaciers and ice caps on the summits of high mountains, as well as the distribution of saline lakes and inland seas.

The amount of water in lakes and rivers on land is less than 1% of the total water volume of the planet. Resources refer to the total amount of water bodies in the hydrosphere.

About 2 3 of the rain and snow water that falls to the ground is consumed by plant transpiration and ground evaporation, and can be used by people for life and production.

About 10,000 cubic meters per person per year. However, due to the disproportionate distribution of population on the earth and the distribution of freshwater resources, coupled with water pollution and waste in the process of use, many countries and regions in the world.

There is a shortage of freshwater resources, and many countries and regions have set up seawater desalination devices or taken other measures to alleviate the contradiction of freshwater at any cost. With the continuous development of the economy, people's demand for fresh water is increasing, and in the near future, the shortage of fresh water resources will become a serious problem faced by all countries in the world.

There are many countries in the world with abundant water resources, most of which are distributed in the Americas and tropical rainforests, and their water resources are very abundant.

Answer]: Usually in areas with abundant precipitation. It is concentrated in the three major tropical rainforest climate zones of the Amazon Basin, Southeast Asian Islands and the Congo Basin. The serious lack of links is located in North Africa, Sahara, central and western Australia, West and Central Asia, and southwestern North America; The countries with abundant runoff resources are, in order:

Brazil, Russia, Canada, the United States, Indonesia, China and India (China ranks sixth, but only 1 4 in the world per capita).

According to hydrographers' estimates, the total amount of water resources on Earth is about 13.8 billion cubic kilometres, of which 97.5 are seawater (1,34.5 billion cubic kilometres). Fresh water accounts for only 2 5, most of which is polar ice and snow glaciers and groundwater, and only 0 01 is suitable for human enjoyment After the 50s of the 20th century, the global population has grown sharply and the industry has developed rapidly. On the one hand, humanity's demand for water is expanding at an alarming rate; On the other hand, increasing water pollution is eating away at a large amount of water available for consumption.

Although the amount of water on the earth is huge, there is very little water that can be directly used by people in production and life. First of all, seawater is salty and bitter, undrinkable, unwaterable, and difficult to use for industry. Second, the earth's freshwater resources account for only a fraction of its total water, and of these very few freshwater resources, more than 70% are frozen in the Antarctic and Arctic ice caps, and together with the inaccessible mountain glaciers and permafrost snow, 87% of the freshwater resources are difficult to use.

The freshwater resources that humans can really use are some of the rivers, lakes and groundwater, which account for about the total amount of water on the planet. Global freshwater resources are not only scarce, but also extremely unevenly distributed regionally. Nine countries, including Brazil, Russia, Canada, China, the United States, Indonesia, India, Colombia and the Congo, account for 60% of the world's freshwater resources.

Eighty countries and territories, which account for about 40 per cent of the world's population, are experiencing severe water stress. Currently, about 1.5 billion people in more than 80 countries face freshwater shortages, of which 300 million people in 26 countries live in total water scarcity. It is estimated that by 2025, 3 billion people in the world will be water-scarcity, involving more than 40 countries and regions.

In the 21st century, water resources are becoming a precious and scarce resource, and the problem of water resources is not only a resource issue, but also a major strategic issue related to the sustainable development of the country's economy and society and long-term peace and stability.