How much water does the Earth use every day, and how much water does the Earth have

More than 70% of the earth's surface is covered by water, and the rest of the landmass, which accounts for about 30% of the earth's surface, also has water.

The Earth's water content is about 1.4 billion cubic kilometers, however, less than 10,000 cubic kilometers of water is available (about the total, and only 9,000 to 10,000 cubic kilometers of this is about the total suitable for human use).

Related information. Freshwater resources are unevenly distributed across the globe. According to incomplete statistics from the biennial Institute for Pacific Studies in the United States, 65% of the world's drinking water is concentrated in only 13 countries

Brazil (Russia) (Canada (6%), the United States (Indonesia) (% China).

Colombia (India) (Peru) (Congo) (Venezuela (Bangladesh (and Myanmar). At the same time, a growing number of countries are facing severe water shortages, with some countries even using less than 1,000 cubic metres per capita per year.

As of 2021, the Earth's water resources are about 100 million cubic kilometers (data as of 2020).

Water is one of the most common substances on Earth, with 71% of the Earth's surface covered by water. It is an important resource for the survival of all life, including inorganic chemistry and human beings, and it is also the most important component of living organisms.

Water is a substance necessary for the normal metabolism of the human body, and under normal circumstances, the body has to excrete water through **, internal organs, lungs and kidneys every day to ensure that toxins are excreted from the body. Children have 80% water in their bodies, older people have 50 to 60% water, and normal middle-aged people have 70% water in their bodies. Pure water is a very weak electrolyte with very weak electrical conductivity.

Water in daily life has more anions and cations due to the dissolution of other electrolytes, so it has more obvious conductivity.

The total amount of water on Earth is 100 million cubic kilometers.

This water is found on the surface of the earth, underground, and in the atmosphere in three forms: liquid, solid, and gaseous. The vast majority of the earth's water is found in the oceans, and seawater accounts for all the earth's water. There are four main oceans on Earth: the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, and the Arctic Ocean, in addition to many inland seas, marginal seas, bays, and straits.

The common feature of seawater is that it contains salt, and the salinity and substance of seawater vary from region to region. The four oceans of the Earth are interconnected, and the sea water is constantly exchanged through the movement of ocean currents. Water on land can be divided into solid and liquid in form, surface water and groundwater according to location, and fresh water and brackish water in nature.

Solid water exists in the form of snow and ice in cold regions at high latitudes and altitudes, including glaciers, ice sheets, ice shelves, icebergs, and groundwater within permafrost.

Every person on the planet consumes 100 million cubic kilometers of water every day. About three-quarters of the world's area is covered with water, and the total volume of water on the earth is about 1,386 million cubic kilometers, of which it is distributed in the oceans, and only about 35 million cubic kilometers of fresh water is needed by humans.

If you deduct the inaccessible glaciers and ice caps on the top of high mountains, as well as the amount of water distributed in saline lakes and inland seas, the amount of water in the freshwater lakes and rivers on land is even smaller, less than 1% of the total water on Earth.

Effectively manage water as a scarce resource. This shift in mindset could result in significant savings. For example, in some cities in some third world countries, 60 percent of drinking water is lost due to rusty pipes or broken pipe joints.

Manila's water mains are already discharging 58 percent of the total water supply, while in Singapore, where water mains are well-managed, the average loss from water mains is only 8.

According to a United Nations survey, about 12 percent of water is wasted in the United Kingdom and the United States, and about 10 percent is wasted due to leakage in industrialized countries, and even more can be saved in some regions through water conservation and recycling.

There has not yet been a water war, but factors such as increased demand for water due to population growth and improved living standards, and the control of upstream areas over downstream areas (upstream control of river flows) could ignite long-standing conflicts.

There are currently 215 international rivers in the world, and 300 groundwater basins and aquifers shared by several countries, and there is a great need for good partnerships.

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.

Water ResourcesThe water resources of the Earth, in a broad sense, 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, freshwater 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.

The planet wastes 340,000 tonnes of water every year.

Question 1: How much water is there in the world In the "big tank" that the earth provides for human beings, there is actually only one tablespoon of water that can be drunk. Some areas of the earth are covered by water, but the water in it is salty and undrinkable.

Of the remaining freshwater, 87 are polar ice sheets, mountain glaciers and ice and snow in permafrost that are difficult for humans to use. What humans can really use is rivers, lakes and groundwater, which only accounts for about the total amount of water on the planet. Even so, overall, there is no shortage of water in the world.

However, the world's freshwater resources are extremely unevenly distributed, with about 65 of the world's water resources concentrated in less than 10 countries, while 80 countries and regions, which account for about 40 of the world's total population, suffer from severe water scarcity. The way humans use water and pollution exacerbate the water strain. Since the mid-90s of the last century, about 500 billion cubic meters of sewage have been discharged into rivers, lakes and seas every year in the world, causing more than 100 million cubic meters of water bodies to be polluted.

Question 2: How much water is there on the earth How much water is on the earth, it is really difficult to determine which slippery because it is fluid and has a wide range. But it's still an estimate, starting with the ocean.

Three-fifths of the Earth's surface is the sea, which contains about 1.37 billion cubic kilometers of water. Then there are rivers and lakes, where the water is about hundreds of thousands of cubic kilometers. Then, most of the water in the state of ice and snow is piled up in the north and south and the north pole and on the top of the high mountains, about 20 million cubic kilometers.

In addition, less obvious water is water vapor that is trapped in the air. This water, which evaporates from the ground into the air and becomes a gaseous state, is about 12,300 cubic kilometers. There is also a kind of water hidden in the ground, which is not to be underestimated, it is another huge reservoir after the ocean, and the total amount of water from the earth and even underground is as high as 400 million cubic kilometers.

Finally, and the most easily overlooked, is the water in the body of living organisms, more than 90% of a cabbage is water; We people 60 70 are also water. If you add up all the water we have estimated, there is about 1.8 billion cubic kilometers of water on the earth, which is very staggering.

Question 3: How much water does the earth consume in a year A faucet that is not turned off tightly will shed 1 to 6 cubic meters of water a month, and a leaky toilet will drain 3 to 25 cubic meters of pera water a month. There are all kinds of waste of household water, which is heart-wrenching!

Experts say that if urban households across the country replace toilets or showers with water-saving products, they can expect to save 100 million tons of water every month. In the face of frequent emergencies.

There is a lot of water on Earth, and the total volume of water is estimated to be about 13.8 billion cubic kilometres. If this water is evenly distributed on the earth's surface, it is equivalent to the entire surface of the earth being covered with a layer of water with an average depth of 2,650 meters. Unfortunately, this water98 is saltwater, mainly found in the ocean.

Fresh water only accounts for 2 of the total water of the earth, about 30 million cubic kilometers, and the fresh water of these 2 can not be all used by human beings, because 88 of it is frozen in the ice caps and glaciers at the poles, and the remaining 12 that is, rivers, lakes and shallow groundwater that can be exploited can be used by human beings, and the vast majority of them are groundwater, and the water in rivers and lakes that cannot be applied without exploitation and can be directly applied only accounts for 0 04 of the total amount of fresh waterWater on Earth is always in flux, with water from the oceans and lands evaporating into the atmosphere, and then falling back to the earth as rain or snow, nourishing all things, replenishing rivers, lakes or flowing into the sea. Water can also seep into the ground and sink into underground aquifers.

Extremely deep groundwater cannot be replenished or extracted, and is known as primary water and therefore cannot be regenerated. As a result of this fluid nature of water resources, landlogging or drought results in an uneven distribution of water resources, about 65 of the world's water resources are concentrated in 10 countries each year, while 80 countries with a combined population of 40 (9 of which are in the Near and Middle East) are severely water scarce, and another 26 countries (with a total population of 230 million people) have very little water resources. We call these countries water-scarce countries.

The international standard for water-scarce countries is based on the definition given by Swedish hydrologists Marin and Falkenmark: if a country has less than 1,700 tons of renewable freshwater** per person per year, then the country will be in a state of low water on a regular or frequent basis; If the amount of water per person per year is less than 1,000 tons, then there will be a shortage of water. At present, there are 15 countries with an average annual water of less than 1,000 cubic meters per person.

With only 82 cubic metres per capita per year, Malta has the highest water scarcity among these countries. In addition to Malta, the most water-scarce countries are Qatar (91 cubic metres per capita per year), Kuwait (95 cubic metres), Libya (111 cubic), Bahrain (162 cubic), Singapore (180 cubic), Barbados (192 cubic), Saudi Arabia (249 cubic), Jordan (318 cubic), Yemen (346 cubic), Algeria (527 cubic), Burundi (594 cubic), Cape Verde (777 cubic), Oman (874 cubic meters), United Arab Emirates (902 cubic meters), Egypt (936 cubic meters).Water is expected to be more expensive than oil in these countries by the middle of the 21st century, with Malta as per capita at 68 cubic metres per year.