What is wet water resources protection harvester
Publish: 2021-04-26 08:41:17
1. Water resources protection refers to the sum of legal, administrative, economic, technical and ecational measures taken to prevent water pollution and damage caused by improper use of water resources
water is the source of life, which moistens everything and nourishes life. 70% of the earth we live on is covered by water, and 97% of it is sea water. Only 3% of the fresh water is closely related to our life, and 78% of the fresh water is glacial fresh water, which is difficult to use at present. Therefore, the fresh water resources we can use are very limited and threatened by pollution. The increasing demand for water supply in agriculture, instry and cities has led to the shortage of limited freshwater resources. In order to avoid water crisis, we must protect water resources
water is the source of life, which moistens everything and nourishes life. 70% of the earth we live on is covered by water, and 97% of it is sea water. Only 3% of the fresh water is closely related to our life, and 78% of the fresh water is glacial fresh water, which is difficult to use at present. Therefore, the fresh water resources we can use are very limited and threatened by pollution. The increasing demand for water supply in agriculture, instry and cities has led to the shortage of limited freshwater resources. In order to avoid water crisis, we must protect water resources
2.
Water is an indispensable and irreplaceable material resource for human survival and social development. On earth, where there is water, there is life. All life activities originate from water
without food, people can live for a long time. If they don't even have water, they can live for about a week at most. So, water is very important to human beings
China is a water shortage country, with less than 2400 cubic meters of water per capita, only 1 / 4 of the world's per capita. In the total amount of water resources in China, the water reserve is only 1.1 trillion cubic meters, and the water consumption is increasing rapidly. In order to solve the problem of water shortage in our country, we must start from self and small things to protect water resources
extended data:
the earth's water storage is very rich, with a total of 1.45 billion cubic kilometers. Although there is a huge amount of water on the earth, there is very little water that can be directly used for people's proction and life
First of all, seawater is salty and bitter, which can not be drunk, watered and used in instry. Secondly, the earth's fresh water resources only account for 2.5% of its total water, and in this very small amount of fresh water resources, more than 70% are frozen in the Antarctic and Arctic ice sheets, coupled with the difficult use of alpine glaciers and permafrost snow, 87% of the fresh water resources are difficult to usethe freshwater resources that human beings can really use are part of rivers, lakes and groundwater, accounting for about 0.26% of the total water of the earth. There is not only a shortage of freshwater resources in the world, but also a great imbalance in regional distribution. According to regional distribution, Brazil, Russia, Canada, China, the United States, Indonesia, India, Colombia and Congo account for 60% of the world's freshwater resources
3. (1) Investigation on quantity and quality of water resources
(2) water resources protection objectives (water quality)
(3) water pollution control (sewage treatment and ecological restoration)
(4) engineering protection measures
(5) non engineering measures (law, management, ecation and publicity)
(2) water resources protection objectives (water quality)
(3) water pollution control (sewage treatment and ecological restoration)
(4) engineering protection measures
(5) non engineering measures (law, management, ecation and publicity)
4. Some people say that the color of the earth is green, which breeds life and indicates the birth and future of mankind. I said that she is the cradle of life, the mother of human beings, and she selflessly dedicates all her love to the children and grandchildren of human beings. It is true that she is very big and vast, but not boundless; She is really beautiful, beautiful scenery, but not forever youth; She is indeed very rich and rich in resources, but not inexhaustible
nowadays, the earth's ecological environment has been seriously damaged by human activities. In particular, water pollution is more prominent
first of all, let's look at a funny and sad story. A tractor stalled in Gezhouba reservoir because it ran out of oil. When the driver saw the slick water in the reservoir, he scooped up the slick oil in a bucket and poured it into the tank. The tractor suddenly drove away. This shows the seriousness of water pollution in our country. Our city is located in the subtropical monsoon area in the lower reaches of Jiulong River. It is rich in fresh water resources. Ten years ago, we could get drinking water just a few steps away from home. However, with the development of economy and the improvement of people's living standards, water pollution is becoming more and more serious. Now most of the river water in our city can't be drunk, Some rivers can't even be used for washing. People can only rely on waterworks to supply water for their daily life. At one time, water costs 50 cents, and in some places, it costs more than 2 yuan. Water pollution has sounded a detailed alarm to people
water is the lifeblood of all things on earth. It moistens all things, nourishes life and creates civilization. The distribution of water resources in China is extremely uneven. China's per capita share of water resources is less than 500 cubic meters, far below the internationally recognized threshold of 1000 cubic meters per capita. Many large and medium-sized cities in the north have stopped proction or limited proction e to lack of water, resulting in an annual loss of 120 billion yuan, and some cities in the south are also suffering from water shortage. At present, more than 300 cities in China are short of water, of which 108 are seriously short of water, and the water shortage is about 10 million tons / day. Millions of people are short of water for their daily life...
in the face of the water resource of "dripping water is as expensive as oil", the waste and pollution of it by human beings is distressing: according to statistics, the world's sewage discharge has reached 400 billion cubic meters, which has polluted 5.5 trillion cubic meters of water, accounting for more than 14% of the world's total runoff
water, air and food are the three major elements of human life and health
50% to 60% of the weight of the human body is water, and up to 80% of the water in children's body. Without water, there would be no life. The fresh water resources on the earth only account for 3% of the total water resources of the earth, and only 0.5% of the 3% fresh water can be directly drunk. Therefore, water is the precious resource of human beings and the spring of life< However, water pollution is quite common and serious in the world. When the harmful substances in the water exceed the self purification capacity of the water body, it will proce pollution. These harmful substances include pesticides, heavy metals and their compounds, various waste gases and radioactive substances
the main sources of water pollution are untreated instrial wastewater and domestic wastewater
dead organic pollution comes from untreated urban domestic sewage, papermaking sewage, agricultural sewage and urban garbage. Dead organic matter can consume dissolved oxygen in water and endanger the survival of fish; It can also lead to hypoxia in water, resulting in the death of microorganisms that need oxygen. It is these aerobic microorganisms that can decompose organic matter and maintain the self purification ability of rivers and streams. The consequence of their death is that rivers and streams turn black and stink, toxins accumulate, and human and livestock are injured
organic and inorganic chemicals pollution, these chemicals come from the wastewater of chemical plants, pharmaceutical plants, paper mills, printing and dyeing plants and tanneries, as well as building decoration, dry cleaning instry, chemical detergent, agricultural pesticides, herbicides, etc. The vast majority of organic procts will accumulate in aquatic organisms, causing poisoning after human consumption. It is difficult to purify the water polluted by organic chemicals, which threatens the safety and health of human drinking water
water pollution caused by human proction activities. Water pollution caused by instry is the most serious. For example, instrial wastewater, which contains many pollutants and complex components, is not only difficult to purify in water, but also difficult to treat
instrial wastewater is the most important cause of water pollution caused by instrial pollution. It accounts for most of the pollutants discharged by instry. The pollutants contained in instrial wastewater vary greatly with the types of factories. Even in the same kind of factories, the quality and quantity of pollutants are different e to different proction processes. In addition to the pollution caused by the direct injection of instrial wastewater into the water body, solid waste and waste gas will also pollute the water body...
agricultural pollution is mainly e to the loose land surface caused by farming or reclamation, rainfall when the soil and terrain are not stable, a large amount of sediment flows into the water and increases the suspended solids in the water
another important reason is that the use of pesticides and chemical fertilizers is increasing in recent years, while only a small amount of pesticides and chemical fertilizers are attached or absorbed, and most of the rest remain in the soil and float in the atmosphere. Through rainfall, they enter and infiltrate into the surface water through surface runoff to form pollution
urban pollution sources are caused by the concentration of urban population, urban sewage, garbage and waste gas. The main pollution of urban pollution source to water body is domestic sewage, which is a mixture of various kinds of sewage proced in people's daily life, including the sewage discharged from kitchen, washing room, bathroom and toilet
in the world, the instrial and domestic wastewater discharged from urban areas alone can reach 500 cubic kilometers in a year, and each drop of wastewater will pollute the water body several times or even dozens of times
a large number of pollutants are first discharged into rivers, causing inland water pollution. In the early 1980s, China investigated 53 thousand kilometers of river reach. About 23.3% of the river reach could not be irrigated e to water pollution, and only 14% of the river reach met the drinking water standard. The pollution of lakes and bays is also very serious. Even groundwater can't escape this disaster
water pollution is very harmful to human health. Pathogenic microorganisms and viruses in sewage can cause the spread of infectious diseases. Some poisonous substances in water can kill people and animals in a few minutes. The most dangerous is cadmium, lead and other metal substances, into the human body caused by chronic poisoning, once found can not stop
there are many adverse factors for the impact of polluted water on human body: 70% - 80% of the water in human body is water, so drinking poor water quality for a long time will lead to poor physical fitness and natural weakening of resistance, so all kinds of diseases are inevitable. Moreover, when the long-term accumulated pollutants reach the body and cannot be borne by the body, no matter how skillful doctors or effective drugs may be able to work, So the saying that "water is the king of all medicines" is true<
the impact of common drinking water quality items on human health:
lead: harmful to kidney and nervous system, highly toxic to children, carcinogenicity has been confirmed
cadmium: acute damage to kidney
arsenic: harmful to skin and nervous system, carcinogenicity has been confirmed
mercury: great harm to human body, the main organs of injury are kidney and kidney Central nervous system
selenium: high concentration will harm muscle and nervous system
nitrite: cause cardiovascular disease, the most obvious effect in infants (blue baby), carcinogenic
total trihalomethane: chloroform has the greatest impact on health, and the most common carcinogenic aspect is bladder cancer
trichloroethylene (organic matter): excessive inhalation will rece the risk of central nervous system, respiratory tract disease and respiratory tract disease In recent years, the United States Environmental Protection Agency (EPA) concted a survey on diseases caused by water from 1971 to 1994. Among 740 cases, 148 cases were caused by protozoa, and 448 cases were caused by protozoa, 486 cases were caused by the disease, which was the highest among all the causes. It is found that Cryptosporidium and flagellate are the most common protozoa species, which need special attention. They are most commonly found in recreational scenic spots and animal husbandry areas, and most of them are raising pigs and cks. Statistics also show that a total of 89 deaths were caused in 23 years, and 70 deaths were caused by protozoa< According to the World Health Organization survey, 70% of the people in the world can not drink safe and healthy drinking water. At present, 15 million children under the age of five die every year, most of which are related to drinking water. According to the United Nations, 250000 people in the world get sick or die of water shortage every day
water pollution not only threatens human beings, but also brings huge losses to fisheries. It seriously killed the fish and shrimp, interfered with the fish reproction, and greatly reced the yield and quality of the fish. Sewage also pollutes farmland and crops, recing agricultural proction. Water pollution also causes other environmental degradation, affecting people's sightseeing, entertainment and recuperation
water is not only the source of life, but also very important to human beings, and the pollution is so severe. Therefore, we should prevent and protect water resources, and make rational use of water< The main measures for sewage treatment are as follows:
(1) financial, administrative and legal safeguard measures
1. Financial support is an essential condition
obviously, financial support is one of the important conditions for pollution control. Without funds, all treatment measures can not be implemented
2. The government's support is the backing
urban water pollution control involves a wide range, not only residents, but also field personnel, military system, ethnic minorities and the interests of rights holders. Therefore, the water sector alone can not solve the problem, even if coupled with the environmental protection department, the strength is still weak. It needs the strong support of the municipal government, and the municipal government also needs the support of the central government. Without the support of a strong government, many coercive measures will not work
3. Pollution control needs legal system
laws and regulations are the yardstick that people abide by together. Local laws should be formulated to protect urban water environment, so that water system management departments can have laws to abide by and administer according to law. It will be easier to do such things< According to the field survey results, domestic sewage is the most serious pollution source in the water system, and the complete interception of domestic sewage is the fundamental to the pollution control. In addition, rainwater pipes are often used as sewage pipes, so the implementation of sewage / rainwater diversion is also an important measure. The sewage is sent to the sewage treatment plant for treatment, and the rainwater can be directly discharged into the natural water body to rece the treatment load of the sewage treatment plant, and the sewage can be discharged through the river
2. Relocation and reconstruction of old cottage areas
generally speaking, new residential areas in cities and towns have complete sewerage system, and sewage / rain diversion has been implemented. However, the houses in the old cottage area are dilapidated, most of them have no sewer system, and there is no distinction between sewage and rain, which is the main source of river pollution. Whether from the perspective of pollution control or from the perspective of urban construction, the old cottage area needs to be relocated< (3) municipal management measures
1. Strengthen the comprehensive management of urban health
strengthen the comprehensive management of urban health, keep the streets clean, and rece the dirt brought into the river by wind, rain and other factors. On the free market, restaurants, migrant areas
nowadays, the earth's ecological environment has been seriously damaged by human activities. In particular, water pollution is more prominent
first of all, let's look at a funny and sad story. A tractor stalled in Gezhouba reservoir because it ran out of oil. When the driver saw the slick water in the reservoir, he scooped up the slick oil in a bucket and poured it into the tank. The tractor suddenly drove away. This shows the seriousness of water pollution in our country. Our city is located in the subtropical monsoon area in the lower reaches of Jiulong River. It is rich in fresh water resources. Ten years ago, we could get drinking water just a few steps away from home. However, with the development of economy and the improvement of people's living standards, water pollution is becoming more and more serious. Now most of the river water in our city can't be drunk, Some rivers can't even be used for washing. People can only rely on waterworks to supply water for their daily life. At one time, water costs 50 cents, and in some places, it costs more than 2 yuan. Water pollution has sounded a detailed alarm to people
water is the lifeblood of all things on earth. It moistens all things, nourishes life and creates civilization. The distribution of water resources in China is extremely uneven. China's per capita share of water resources is less than 500 cubic meters, far below the internationally recognized threshold of 1000 cubic meters per capita. Many large and medium-sized cities in the north have stopped proction or limited proction e to lack of water, resulting in an annual loss of 120 billion yuan, and some cities in the south are also suffering from water shortage. At present, more than 300 cities in China are short of water, of which 108 are seriously short of water, and the water shortage is about 10 million tons / day. Millions of people are short of water for their daily life...
in the face of the water resource of "dripping water is as expensive as oil", the waste and pollution of it by human beings is distressing: according to statistics, the world's sewage discharge has reached 400 billion cubic meters, which has polluted 5.5 trillion cubic meters of water, accounting for more than 14% of the world's total runoff
water, air and food are the three major elements of human life and health
50% to 60% of the weight of the human body is water, and up to 80% of the water in children's body. Without water, there would be no life. The fresh water resources on the earth only account for 3% of the total water resources of the earth, and only 0.5% of the 3% fresh water can be directly drunk. Therefore, water is the precious resource of human beings and the spring of life< However, water pollution is quite common and serious in the world. When the harmful substances in the water exceed the self purification capacity of the water body, it will proce pollution. These harmful substances include pesticides, heavy metals and their compounds, various waste gases and radioactive substances
the main sources of water pollution are untreated instrial wastewater and domestic wastewater
dead organic pollution comes from untreated urban domestic sewage, papermaking sewage, agricultural sewage and urban garbage. Dead organic matter can consume dissolved oxygen in water and endanger the survival of fish; It can also lead to hypoxia in water, resulting in the death of microorganisms that need oxygen. It is these aerobic microorganisms that can decompose organic matter and maintain the self purification ability of rivers and streams. The consequence of their death is that rivers and streams turn black and stink, toxins accumulate, and human and livestock are injured
organic and inorganic chemicals pollution, these chemicals come from the wastewater of chemical plants, pharmaceutical plants, paper mills, printing and dyeing plants and tanneries, as well as building decoration, dry cleaning instry, chemical detergent, agricultural pesticides, herbicides, etc. The vast majority of organic procts will accumulate in aquatic organisms, causing poisoning after human consumption. It is difficult to purify the water polluted by organic chemicals, which threatens the safety and health of human drinking water
water pollution caused by human proction activities. Water pollution caused by instry is the most serious. For example, instrial wastewater, which contains many pollutants and complex components, is not only difficult to purify in water, but also difficult to treat
instrial wastewater is the most important cause of water pollution caused by instrial pollution. It accounts for most of the pollutants discharged by instry. The pollutants contained in instrial wastewater vary greatly with the types of factories. Even in the same kind of factories, the quality and quantity of pollutants are different e to different proction processes. In addition to the pollution caused by the direct injection of instrial wastewater into the water body, solid waste and waste gas will also pollute the water body...
agricultural pollution is mainly e to the loose land surface caused by farming or reclamation, rainfall when the soil and terrain are not stable, a large amount of sediment flows into the water and increases the suspended solids in the water
another important reason is that the use of pesticides and chemical fertilizers is increasing in recent years, while only a small amount of pesticides and chemical fertilizers are attached or absorbed, and most of the rest remain in the soil and float in the atmosphere. Through rainfall, they enter and infiltrate into the surface water through surface runoff to form pollution
urban pollution sources are caused by the concentration of urban population, urban sewage, garbage and waste gas. The main pollution of urban pollution source to water body is domestic sewage, which is a mixture of various kinds of sewage proced in people's daily life, including the sewage discharged from kitchen, washing room, bathroom and toilet
in the world, the instrial and domestic wastewater discharged from urban areas alone can reach 500 cubic kilometers in a year, and each drop of wastewater will pollute the water body several times or even dozens of times
a large number of pollutants are first discharged into rivers, causing inland water pollution. In the early 1980s, China investigated 53 thousand kilometers of river reach. About 23.3% of the river reach could not be irrigated e to water pollution, and only 14% of the river reach met the drinking water standard. The pollution of lakes and bays is also very serious. Even groundwater can't escape this disaster
water pollution is very harmful to human health. Pathogenic microorganisms and viruses in sewage can cause the spread of infectious diseases. Some poisonous substances in water can kill people and animals in a few minutes. The most dangerous is cadmium, lead and other metal substances, into the human body caused by chronic poisoning, once found can not stop
there are many adverse factors for the impact of polluted water on human body: 70% - 80% of the water in human body is water, so drinking poor water quality for a long time will lead to poor physical fitness and natural weakening of resistance, so all kinds of diseases are inevitable. Moreover, when the long-term accumulated pollutants reach the body and cannot be borne by the body, no matter how skillful doctors or effective drugs may be able to work, So the saying that "water is the king of all medicines" is true<
the impact of common drinking water quality items on human health:
lead: harmful to kidney and nervous system, highly toxic to children, carcinogenicity has been confirmed
cadmium: acute damage to kidney
arsenic: harmful to skin and nervous system, carcinogenicity has been confirmed
mercury: great harm to human body, the main organs of injury are kidney and kidney Central nervous system
selenium: high concentration will harm muscle and nervous system
nitrite: cause cardiovascular disease, the most obvious effect in infants (blue baby), carcinogenic
total trihalomethane: chloroform has the greatest impact on health, and the most common carcinogenic aspect is bladder cancer
trichloroethylene (organic matter): excessive inhalation will rece the risk of central nervous system, respiratory tract disease and respiratory tract disease In recent years, the United States Environmental Protection Agency (EPA) concted a survey on diseases caused by water from 1971 to 1994. Among 740 cases, 148 cases were caused by protozoa, and 448 cases were caused by protozoa, 486 cases were caused by the disease, which was the highest among all the causes. It is found that Cryptosporidium and flagellate are the most common protozoa species, which need special attention. They are most commonly found in recreational scenic spots and animal husbandry areas, and most of them are raising pigs and cks. Statistics also show that a total of 89 deaths were caused in 23 years, and 70 deaths were caused by protozoa< According to the World Health Organization survey, 70% of the people in the world can not drink safe and healthy drinking water. At present, 15 million children under the age of five die every year, most of which are related to drinking water. According to the United Nations, 250000 people in the world get sick or die of water shortage every day
water pollution not only threatens human beings, but also brings huge losses to fisheries. It seriously killed the fish and shrimp, interfered with the fish reproction, and greatly reced the yield and quality of the fish. Sewage also pollutes farmland and crops, recing agricultural proction. Water pollution also causes other environmental degradation, affecting people's sightseeing, entertainment and recuperation
water is not only the source of life, but also very important to human beings, and the pollution is so severe. Therefore, we should prevent and protect water resources, and make rational use of water< The main measures for sewage treatment are as follows:
(1) financial, administrative and legal safeguard measures
1. Financial support is an essential condition
obviously, financial support is one of the important conditions for pollution control. Without funds, all treatment measures can not be implemented
2. The government's support is the backing
urban water pollution control involves a wide range, not only residents, but also field personnel, military system, ethnic minorities and the interests of rights holders. Therefore, the water sector alone can not solve the problem, even if coupled with the environmental protection department, the strength is still weak. It needs the strong support of the municipal government, and the municipal government also needs the support of the central government. Without the support of a strong government, many coercive measures will not work
3. Pollution control needs legal system
laws and regulations are the yardstick that people abide by together. Local laws should be formulated to protect urban water environment, so that water system management departments can have laws to abide by and administer according to law. It will be easier to do such things< According to the field survey results, domestic sewage is the most serious pollution source in the water system, and the complete interception of domestic sewage is the fundamental to the pollution control. In addition, rainwater pipes are often used as sewage pipes, so the implementation of sewage / rainwater diversion is also an important measure. The sewage is sent to the sewage treatment plant for treatment, and the rainwater can be directly discharged into the natural water body to rece the treatment load of the sewage treatment plant, and the sewage can be discharged through the river
2. Relocation and reconstruction of old cottage areas
generally speaking, new residential areas in cities and towns have complete sewerage system, and sewage / rain diversion has been implemented. However, the houses in the old cottage area are dilapidated, most of them have no sewer system, and there is no distinction between sewage and rain, which is the main source of river pollution. Whether from the perspective of pollution control or from the perspective of urban construction, the old cottage area needs to be relocated< (3) municipal management measures
1. Strengthen the comprehensive management of urban health
strengthen the comprehensive management of urban health, keep the streets clean, and rece the dirt brought into the river by wind, rain and other factors. On the free market, restaurants, migrant areas
5.
Water is the source of life. Human health comes from water first. People can not eat for several days, but can not drink for several days. Water is the source of life. The metabolism of all living things cannot do without water, but water is not inexhaustible. Water, or rather fresh water, is needed by living things. Water accounts for about 70% of the earth's area, but 97% of it is sea water. Except for glaciers and salt lakes, only 2% of the rest is really available fresh water resources. This water needs to support thousands of creatures on our planet
6.
Water resources protection includes the quantity and quality of surface water and groundwater. In terms of water quantity, comprehensive planning, overall consideration, comprehensive utilization and efficiency should be taken into consideration to give full play to the multi-function of water resources and avoid water source depletion and over exploitation. In terms of water quality, pollution and other public hazards should be prevented to maintain good water quality
The fundamental purpose of water resources protection is to prevent and control water pollution and make rational use of water resources, so as to realize the sustainable utilization of water resources; Increase forest vegetation, conserve water and soil, conserve water resources, prevent and control pollution, protect water quality, establish ecosystem protection and management system, and realize the virtuous cycle of water ecological environment The concrete measure of water resources protection is to control water pollution. The main measures of water pollution control are as follows:1) rece instrial wastewater pollution. Recing instrial wastewater pollution is an important part of water pollution control. The pollution control of instrial wastewater can be realized by means of cleaner proction, recycling and terminal treatment
2) construction of urban drainage system. Urban drainage system refers to the infrastructure for the collection, transportation and treatment of urban sewage. The construction of a perfect urban drainage system is of great significance for the protection of urban regional water environment
3) strengthen management. In addition to the use of technical means, water pollution control also needs to strengthen management through legislation, standards and other ways7.
1. Only when we realize that "saving water is glorious and wasting water is shameful", can we always pay attention to saving water everywhere and start from the little things around us
Develop good habits, such as turning off the tap of dripping water, etc3. Use water-saving appliances
In terms of proction, especially for some instries with high water consumption, we should focus on how to optimize the operation of water system, how to improve the concentration ratio of circulating water, and how to improve the recycling of water resources as the key points of water-saving work, and actively organize technological research to improve the comprehensive utilization rate of water; At the same time, practical operation system should be established to implement quota management of water consumption
with the graal development of science and the increasing number of high-rise buildings, the problem of water shortage is becoming more and more serious. With the destruction of human beings, the original blue "crystal ball" is no longer clear, no longer blue, and is about to dry up
although 71% of the earth's surface is covered with water, in fact, fresh water resources only account for about 2% of the earth's total water, while the total amount of fresh water that can be used by human beings only accounts for 3% of the earth's total water, accounting for 0% of the total fresh water storage. 34% It can be seen that the available water on the earth is not as much as human imagination. If we let them continue to be destroyed by human beings, sooner or later, it will disappear
8. First of all, we should understand the current problems of water resources and take corresponding engineering measures
1. Water shortage
at present, many parts of the world are faced with the problems of water shortage, scarce precipitation, high evaporation loss and so on. Water storage can be increased by building reservoirs in flood season, and drinking water can be increased by desalination in coastal areas. Karez in Xinjiang, for example, irrigates farmland with underground water. Karez does not evaporate a large amount of water e to heat and strong wind, so the flow rate is stable and the gravity irrigation is ensured
2. Soil erosion
soil erosion will rece land proctivity, deposit rivers, lakes and reservoirs, pollute water quality and affect ecological balance. Soil erosion has caused great loss of water resources. Soil erosion can be controlled by dam construction, land leveling, construction of basic farmland, pumping irrigation and other engineering measures
3. Water pollution
more than 420 billion cubic meters of sewage is discharged into rivers, lakes and seas every year, polluting 5.5 trillion cubic meters of fresh water, which is equivalent to more than 14% of the total global runoff. Water pollution is a great threat to water resources. The establishment of sewage treatment plant belongs to water resources protection project
in addition, there are many engineering measures, so it is suggested that the owner of the building should look for them.
1. Water shortage
at present, many parts of the world are faced with the problems of water shortage, scarce precipitation, high evaporation loss and so on. Water storage can be increased by building reservoirs in flood season, and drinking water can be increased by desalination in coastal areas. Karez in Xinjiang, for example, irrigates farmland with underground water. Karez does not evaporate a large amount of water e to heat and strong wind, so the flow rate is stable and the gravity irrigation is ensured
2. Soil erosion
soil erosion will rece land proctivity, deposit rivers, lakes and reservoirs, pollute water quality and affect ecological balance. Soil erosion has caused great loss of water resources. Soil erosion can be controlled by dam construction, land leveling, construction of basic farmland, pumping irrigation and other engineering measures
3. Water pollution
more than 420 billion cubic meters of sewage is discharged into rivers, lakes and seas every year, polluting 5.5 trillion cubic meters of fresh water, which is equivalent to more than 14% of the total global runoff. Water pollution is a great threat to water resources. The establishment of sewage treatment plant belongs to water resources protection project
in addition, there are many engineering measures, so it is suggested that the owner of the building should look for them.
9. The key to protect river water resources is to prevent and control water pollution and realize comprehensive utilization of water resources. Water pollution includes surface water pollution and groundwater pollution. Instrial wastewater, instrial garbage, instrial waste gas, domestic sewage and domestic garbage proced in the proction process can cause water pollution through different infiltration ways. For a long time, environmental events caused by the direct discharge of instrial wastewater are common, which bring great harm to human proction and environment Therefore, the proction and domestic sewage should be effectively controlled. Centralized sewage treatment can be adopted in cities; Instrial enterprises must implement the "three Simultaneities" system of environmental protection; According to the different nature of proction sewage, the corresponding sewage treatment measures are adopted. In short, we must resolutely implement the supervision and management system of water pollution prevention and control, adhere to the principle of "who pollutes, who governs", strictly implement the one vote veto system of environmental protection, promote the development of enterprise sewage treatment, and finally realize the comprehensive utilization of water resources.
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