What are the benefits and disadvantages of the water cycle on Earth for humans, the benefits and dis

Water is a constituent substance of all living organisms, and it is also a substance necessary for the metabolic activities of life. It is also an important resource for human production activities, and the water on the earth is distributed in oceans, lakes, swamps, rivers, glaciers, snow-capped mountains, as well as atmospheric organisms, soils and strata. Water in the atmosphere and organisms on land accounts for a very small fraction.

Who likes to manifest itself mainly in three aspects1, water is the medium of all nutrients, the circulation of nutrients and the water cycle.

Inextricably linked. 2. Water is a good solvent for substances in the ecosystem.

It makes the role of energy transfer and utilization. 3. Water is one of the drivers of geological change, the loss of mineral elements in one place, and the product of mineral elements in another place is often completed through the water cycle. The water cycle is the link between the earth's circles and various water bodies, it is a regulator, it regulates the energy between the earth's circles, and is an important factor in the change of cold and warm climates.

The water cycle is the sculptor, shaping the colorful phenomena of the earth's surface. The water cycle is also a conveyor belt, which is a powerful driving force for the migration of low-surface substances, and mainly in carriers. More importantly, through the water cycle, the ocean is constantly pumping fresh water to land, replenishing and renewing the freshwater resources on land.

This makes water a renewable resource. The water cycle is good for humans.

The benefits are: Precipitation is guaranteed. The growth of crops.

Or you can adjust the balance of weather temperature. For example, if the sun is strong today and it rains, you may feel very comfortable. And the water cycle is also good for the storage of water, such as those reservoirs.

The downside is that if the water cycle is too strong, it will cause flooding.

Human activity is onWater cycleImpacts: Impacts on surface runoff, such as diversion for irrigation, construction of reservoirs, and cross-basin water transfer. It can also affect water vapor transport and precipitation, such as artificial rainfall.

The main functions of the water cycle are manifested in three aspects:

Water is the medium of all nutrients, and the cycle of nutrients and the water cycle are inextricably linked.

Water is a good solvent for substances in the ecosystem.

It plays a role in energy transfer and utilization.

Water is one of the drivers of geological change, the loss of mineral elements in one place, and the deposition of mineral elements in another place often have to be completed through the water cycle.

The hydrosphere on Earth is a never-ending dynamic system. in solar radiation.

Driven by the gravitational pull of the earth, water is constantly moving between the various components of the hydrosphere, forming a global sea-land cycle (large circulation), and connecting various water bodies to enable various water bodies to exist for a long time. The exchange of water between the sea and the land is the main thread of this cycle and is of the greatest significance.

a) Beneficial effects.

1.construct reservoirs and dams to store floodwater, and increase the runoff of rivers during the dry season; The expansion of the water surface area and the increase in the water level can increase the evaporation in the basin.

2.The transfer of water across river basins and the expansion of irrigation area have increased evaporation to a certain extent, resulting in an increase in water vapor content and precipitation in the atmosphere.

ii) Adverse effects.

1.The reclamation of land around the lake reduces the natural water storage of the lake, weakens its ability to prevent floods and droughts, and weakens the regulating effect of the lake on the climate of the surrounding area.

2.The destruction of vegetation reduces the ability of vegetation to conserve water, increases surface runoff, and reduces the amount of infiltration.

Human activity is onWater cycleThe impact can be so large that it can directly affect important links in the water cycle, and even affect water flow and water qualityFor example, the construction of reservoirs can increase the amount of water infiltrated by the link.

A series of activities aimed at rivers and lakes, such as diversion of water from rivers and lakes for irrigation, construction of reservoirs, cross-basin water transfer, river reclamation and reconstruction, and enclosure of lakes and fields, have greatly changed the natural distribution of surface runoff.

The development and utilization of groundwater resources and the construction of underground projects in local areas have an unavoidable impact on underground runoff, such as artificial recharge of groundwater in the rainy season, and pumping and selling groundwater for irrigation.

The construction of urban underground railways destroys the geological structure and changes the direction of groundwater seepage; The impact of the construction of cement pavement indirectly affects underground runoff by affecting infiltration. Affects local atmospheric precipitation, such as artificial rainfall. Affecting evaporation, such as afforestation, the construction of reservoirs can increase the amount of water vapor in local areas.

It maintains the dynamic balance of global water, so that various water bodies around the world are in a state of continuous renewal;

Realize material migration and energy exchange between various circles on the surface and between sea and land;

influencing the climate and ecology of the world;

Shaping the shape of the earth's surface.

The water cycle refers to the change of state of water in different parts of the earth to another place on the earth by absorbing the energy of the sun. For example, moisture from the ground is evaporated by the sun into water vapor in the air.

Whereas, the state of water on earth includes solid, liquid, and gaseous states. Most of the earth's water is found in the atmosphere, on the ground, underground, in lakes, rivers and oceans. Water goes through some physical actions such as:

Evaporation, precipitation, infiltration, surface and underground flows, etc., move from one place to another. Like water flowing from a river to the ocean.

Discovered by Perrault and Majort in the 16th and 17th centuries.

In nature, water moves continuously between various water bodies through evaporation and plant transpiration, transport, condensation precipitation, infiltration, and runoff (surface runoff, underground runoff), and this movement process is called the water cycle.

First, it maintains the global water balance.

Second, freshwater resources should be continuously renewed.

Third, it enables the migration of matter and the exchange of energy between the various spheres of the earth and between the sea and land.

Fourth, it influences the global climate and ecology and continues to sculpt the earth's surface.

Water on Earth is circulating all the time.

The state of water on Earth includes solid, liquid, and gaseous states. The external factors that form the water cycle are solar radiation and gravity, which provide the water cycle with the physical state change and movement energy of the water.

Broadly speaking, the main path of the water cycle on Earth is that surface water (water from rivers, soils, lakes, oceans, etc.) evaporates into the atmosphere, flows in the atmosphere, and condenses into clouds in the flow, and some of this water returns to the surface in the form of precipitation or snowfall. Some of the water that is returned to the land seeps into the ground and becomes underground circulating water, and some of it can be returned to the surface in the form of springs.

Water returning to land can also be pooled through surface runoff (rivers) and eventually flow to the ocean.

A similar cycle of water in lakes and inland rivers exists.

Through various forms of water circulation, water on the earth is constantly circulating in land, sea, atmosphere, rivers, lakes, etc.

Schematic diagram of the water cycle.

Water on Earth is definitely recycled, and water evaporates into water vapor and then returns to the earth as rain.

Yes, and it's a constant cycle. Only deep groundwater and glacier water are not involved in the water cycle.

<>1. The recycling of water can greatly alleviate the current situation of water shortage;

2. Water recycling is a positive protection of the water environment;

3. Water recycling is the best way to solve the problem of ecological water and environmental water;

4. Be able to rationally allocate water resources and improve the utilization rate of water resources;

5. The reuse of industrial and urban sewage can reduce environmental pollution.

Due to the changes in the chemical composition of the atmosphere due to human production and socio-economic development, the significant increase in the concentration of greenhouse gases such as CO2, CH4, CFCs, etc., has coincidentally changed the radiation balance of the earth's atmospheric system and caused the temperature to rise, and the global precipitation has increased.

Water cycleIt is a multi-link natural process, and the global water cycle involves evaporation, atmospheric water transport, surface water and groundwater cycle, as well as various forms of water storage, precipitation, evaporation and runoff are the three most important links in the water cycle process, and the water cycle pathways composed of these three determine the global water balance and the total water resources of a region.

Evaporation is one of the most important links in the water cycle. The water vapor produced by evaporation enters the atmosphere and moves with atmospheric activity. Water vapour in the atmosphere comes mainly from the oceans, and some also from evapotranspiration from the surface of the continents. Atmosphere.

The circulation and suffocation of water vapor is a cyclical process of evaporation, condensation, precipitation, and evaporation. Water vapor over the ocean can be transported to the land to condense precipitation, which is called extraneous water vapor precipitation. The direct condensation of water vapor over the continent is called internal water vapor precipitation. Total precipitation in a place.

The ratio to external water vapor precipitation is called the water cycle of the place.

Coefficient. The global atmospheric moisture exchange cycle is 10 days. Water vapor transport is one of the most active parts of the water cycle.

1. Due to the changes in the chemical composition of the atmosphere due to human production and social and economic development, such as the significant increase in the concentration of greenhouse gases such as CO2, CH4, CFCS, etc., which changes the radiation balance of the earth's atmospheric system and causes the temperature to rise, the global precipitation increases, the evaporation increases, the water cycle accelerates and the regional water cycle changes. The time scale of this change can last from decades to centuries.

2. Another human activity mainly acts on the underlying surface of the river basin, such as land use change, farmland irrigation, agriculture and forestry reclamation, deforestation, expansion of the area of impervious layer of urbanization, development and utilization of water resources, and changes in the ecological environment. The effects of such human activities, although localized, tend to be intense and sometimes extend to larger areas.

With the development of industry and the improvement of people's living standards, the air quality has deteriorated significantly, greenhouse gases have increased year by year, global warming has become increasingly obvious, glaciers have accelerated their dissolution, and sea levels have risen year by year, resulting in a significant increase in strong convective weather in recent years, and acid rain and floods often strike. Due to the inefficient use (or even waste) of freshwater resources, the shortage of freshwater resources has become particularly prominent. (Just think about that).

Water is a natural resource that can be renewed, constantly recovering through its own recycling process. Water resources, in a broad sense, refers to the water in multiple links and forms (three states of water: solid, liquid and gaseous) in the earth's hydrosphere, but at present, human beings focus on the investigation and evaluation, development and utilization and protection of water resources mostly refer to water resources in a narrow sense, that is, they usually refer to the water cycle that participates in nature, and through the exchange of water between land and sea, fresh water resources can be renewed on land year by year, and atmospheric precipitation is its supplementary source.

Water resources play an important role, mainly in the following aspects:

1. Regulate the earth's climate.

Water is an important component of the atmosphere. Although the atmosphere contains only one millionth of the world's water, the cyclic interaction between the atmosphere and water determines the movement of the Earth's water cycle, creating a climate that supports living things. Water in the atmosphere helps regulate the global energy balance, and the water cycle plays a role in the transfer of energy between different regions.

2. Water rubs the shape of the earth's surface.

Flowing water creates and drives land formation, rearranging landscapes, and delta formation, among other things. Water is a key factor in the formation of soil and also plays an important role in the physical weathering of rocks.

3. Water has the function of material transportation.

Water can transport a wide variety of materials and nutrients. There are two forms of substances that water transports: dissolved minerals and whole substances.

Various particulate matter in the atmosphere can settle into the water body and then due to water transport. From this aspect, it can be seen that water can transport and diffuse environmental pollutants to a larger and wider area.

4. Water is an indispensable substance for all living things.

Water interacts with living things in a variety of ways, and water is extremely important for living things. The formation of life is inseparable from water, water is the main body of living things, and water is the medium of biochemistry in and out of living organisms, and all life is inseparable from water. Within a regional scale, water is one of the key factors in determining vegetation communities and productivity, but also the type of animal community, animal behavior, and much more.

5. Water is the most basic material basis for human survival.

Water is very closely related to human beings, and it is inseparable from this precious natural resource for both life and production activities. Water is not only an important component of the human body, but also a medium of human metabolism. The water content of the human body accounts for two-thirds of body weight, and each person needs at least 2-3 litres of water per day to sustain themselves.

Industrial production, irrigation of farmland and urban life all require large amounts of water.

Water is the source of life, water has a very big effect on the whole human race and the earth, we can go three days without eating, but we can't go without drinking water for three days.