Information on our country as a country with severe drought and water shortages

China's total water resources on October 20, 2009 were trillions of cubic meters. Among them, trillions of cubic meters of surface water and trillions of cubic meters of groundwater, due to the mutual conversion and recharge of surface water and groundwater, deducting the trillions of cubic meters of double calculation of the two, the amount of groundwater resources that are not duplicated with river runoff is about one trillion cubic meters. According to internationally recognized standards, water scarcity is considered to be mild if the per capita water resources are less than 3,000 cubic meters; Moderate water scarcity is considered if the per capita water resources are less than 2,000 cubic meters; Water shortages are considered serious if the per capita water resources are less than 1,000 cubic meters; Water scarcity is considered to be less than 500 cubic metres per capita.

At present, 16 provinces (autonomous regions and municipalities) in China have per capita water resources (excluding transit water) below the severe water shortage line, and 6 provinces and autonomous regions (Ningxia, Hebei, Shandong, Henan, Shanxi and Jiangsu) have per capita water resources below 500 cubic meters. China's total water resources are not large, ranking 6th in the world, but its per capita share is even smaller, at 2,240 cubic meters, ranking 88th out of 153 countries in the World Bank's statistics. The regional distribution of China's water resources is also very uneven, with the Yangtze River basin and its southern areas accounting for only 81% of the country's land area. The area north of it accounts for only 19% of the country's water resources.

China is a country with severe drought and water shortage.

2004-03-22 11:53 News Evening News.

BEIJING, March 21 (Xinhua) -- Today is the 12th World Water Day. The grim situation of water scarcity facing the world has once again sounded the alarm bell for mankind: 80 countries and regions, accounting for about 40 of the world's total population, are suffering from severe water shortages.

The actual amount of available water resources in China is also close to the upper limit of rational utilization, and the development of water resources is extremely difficult.

Water is one of the world's most precious resources. At present, the world's freshwater resources account for only 70% of its total water, of which more than 70% are frozen in the ice caps of the Antarctic and the Arctic, and 87% of it is combined with hard-to-use mountain glaciers and permafrost snow.

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.

China is a country with severe drought and water shortage, although the total amount of freshwater resources is 2.8 trillion cubic meters, but only 2,200 cubic meters per capita, making it one of the 13 countries in the world with the poorest per capita water resources.

According to the Ministry of Water Resources**, the Chinese population will reach 1.6 billion by 2030, and the per capita water resources will be only 1,750 cubic meters. Under the condition of fully considering water conservation, it is estimated that the total water consumption will be 700 billion to 800 billion cubic meters, and the water supply capacity will be increased by 130 billion to 230 billion cubic meters compared with the current level, and the actual available water resources in the country will be close to the upper limit of rational water use.

Our country is a drought and water shortage, and the country is full of more than one

a.That's right. b.Mistake.

Correct Answer: a

Solution: (1) Floods are frequent natural disasters in China with serious losses;

2) Drought is the largest, most common and most widely distributed climate disaster in China's agricultural production

The "abnormality" of the summer monsoon and rain belt often causes drought and flood disasters Therefore, d Comments:

Test center of this question: The impact of drought, waterlogging, cold waves, and wind collapse on the front wheel platform Comments: This question examines the reasons for the frequent occurrence of drought and flood disasters in China

North China and the West are the North China.

The northern part accounts for about 60% of the total area of the country, but it is less than 20% of the total runoff of the country, especially in North China and Northwest China, where the water shortage is the most serious. Northwest China is limited by the geographical environment and has congenital water resources.

The Earth's water resources, broadly speaking, refer to the total amount of water in the hydrosphere. It includes surface water and groundwater, as well as rivers, lakes, wells, springs, tidal waves, harbors and aquaculture waters that are controlled by humans and can be directly used for irrigation, power generation, water supply, shipping, aquaculture and other purposes. Water resources are indispensable and important natural resources for the development of the national economy.

In many parts of the world, demand for water is already outstripping its capacity, and many regions are on the verge of imbalances in water use.

The drought is in the northwest region, the southwest region, Xinjiang, Gansu, Yunnan and other places, the drought is more serious.

The arid regions of Northwest China include Xinjiang, Qinghai, Gansu, Ningxia and the north of the Qinling Mountains in Shaanxi, the western part of Inner Mongolia and the western part of Shanxi, accounting for more than one-third of the total area of the country, and China's major deserts are distributed in this region.

Yunnan in southwest China is severely drought, such as Chuxiong Yi Autonomous Prefecture in Yunnan Province, which has suffered from a three-year drought that has led to a serious shortage of water storage in reservoirs. At the beginning of this year, the rainfall continued to be low, and as the temperature continued to rise, the water storage in the reservoir pond continued to decline, and the drought intensified in various places.

The diurnal and annual temperature ranges are large, and the evaporation may be much greater than the precipitation, and there will be more wind and sand, less clouds, and strong sunshine. Insufficient water is a major factor that restricts plant growth. Due to the abundance of heat, it has the potential to become a high-yield area when irrigation water is used and fertilized.

Areas with scarce precipitation, high evaporation, and low runoff.

The areas with severe drought in China are central Gansu, southern Ningxia, Shanxi and northern Shaanxi, central and western Inner Mongolia Autonomous Region, and Bashang area of Hebei Province.

The drought in China is more serious in the northwest region, but the most serious water shortage is in the north region.

In 2007, drought occurred in most provinces (municipalities and districts) of the country, and the distribution of agricultural drought was wide and severe, and the area affected by drought and the area affected by drought were significantly larger than those in recent years. Among them, Heilongjiang, Jilin, Liaoning, Jiangxi, Hunan, Gansu and other provinces are suffering from severe drought.

High-quality answers.

First, we should understand the meaning of water resources. Water resources are broad and narrow. Water resources in a broad sense refer to the general term for all water bodies on the earth; Water resources in the narrow sense are what we usually call water resources, which refers to the freshwater resources on the earth.

Water on Earth is stored in the oceans, land, and atmosphere. Ocean water accounts for 97% and is the main body of water on Earth. Atmospheric water mainly exists in a gaseous state and has the smallest specific gravity.

Terrestrial water is divided into fresh water and brackish water according to different salinity, brackish water is mostly distributed in endorheic lakes and underground brackish water, fresh water accounts for the global water reserves, including river water, freshwater lake water, groundwater freshwater and glaciers, etc., of which glaciers and deep groundwater account for 98% of the total freshwater, which is difficult to use under the existing technical conditions. At present, the freshwater resources used by human beings, mainly the water of rivers and lakes and shallow groundwater, only account for the visible proportion of the world's freshwater resources, and the water resources that can be used by human beings on the earth are limited. With the growth of population, the improvement of people's living standards and social and economic development, the consumption of water resources has increased dramatically, resulting in a decrease in available water resources.

It is this limited water resource that has been polluted to varying degrees, what is the cause of water pollution? It is mainly industrial wastewater, pesticides and fertilizers in agricultural production and urban sewage. The scarcity of freshwater resources is not a problem unique to individual countries, but a problem faced by global development.

According to a 1995 World Bank survey, 80 countries, accounting for 40 percent of the world's population, are facing a water crisis, with about 1 billion people in developing countries without access to clean water, 1.7 billion without good sanitation, and about 25 million people dying every year from drinking unclean water. China has abundant water resources, ranking sixth in the world; However, China's per capita water resources are small, only 1 4 of the world averageWater resources are scarce in our country.

Saving and protecting water resources is the core way to solve China's water resources problem. Although the construction of water conservancy and the transfer of water across river basins can effectively alleviate the problem of water shortage in some areas and in some time, this can only treat the symptoms, not the root cause. Water resources are renewable resources, and from the perspective of the earth's water environment and total water resources, they should be recyclable and sustainable.

However, on the one hand, water resources do not refer to the whole of the world's water bodies, but only to the freshwater resources that can provide human use, and the proportion of these freshwater resources that can be directly used by human beings is very small. On the other hand, in a certain space and within a certain time frame, water resources are not only limited, but may also be depleted due to natural causes (e.g., climate, river distribution) or man-made reasons (e.g., irrational use, pollution and waste). Therefore, we need to understand the process of the water cycle and the attributes of renewable resources dialectically and scientifically, and understand why the "water balloon" we live in also causes "water shortage".We should protect water and save every drop of water and not let our children and grandchildren see the last drop.

The more serious drought areas in China should be the northwestern provinces: Xinjiang, Qinghai, Ningxia, Gansu and the Loess Plateau of Shaanxi! There is a lot of desertification in many places! The wind and sand are big! Therefore, it is urgent to protect the environment and control the desert!

Arid place.

In the northwest region, southwest region, Xinjiang, Gansu, Yunnan and other places, the drought is more serious.

Arid Northwest Regions.

Including Xinjiang, Qinghai, Gansu, the whole territory of Ningxia and the north of the Qinling Mountains of Shaanxi, the western part of Inner Mongolia and the western part of Shanxi, the total area accounts for more than one-third of the country, China. Lord.

a,b,c,d

China's main measures to solve the shortage of water resources are: cross-basin water transfer, reservoir construction, seawater desalination, and water conservation.

prevention and control of water pollution, etc. Inter-basin water transfer, such as south-to-north water diversion.

Luan into Tianjin; Reservoirs will be built, such as the Three Gorges Water Conservancy Project on the Yangtze River and the Xiaolangdi Water Conservancy Project on the Yellow River.

Seawater desalination is one of the effective ways to solve the shortage of water resources, which is the process of separating the salt in seawater and turning saltwater into fresh water. Water conservation is conducive to improving the utilization rate of water and avoiding the waste of water resources; Water pollution has exacerbated the situation of water stress to a certain extent, so it is necessary to prevent and control water pollution to solve the problem of insufficient water resources. Therefore, ABCD is selected for this topic.

Drought and drought are two different scientific concepts from a purely natural point of view. Drought usually refers to a climatic phenomenon in which the total amount of fresh water is too low to meet human survival and economic development. Unlike drought, which is a long-term phenomenon, drought is an occasional natural disaster, and even in areas where water is usually abundant, it can be caused by temporary climatic anomalies.

Drought and drought have been major natural disasters facing humanity since ancient times. Even today, when science and technology are so advanced, their catastrophic consequences still abound. It is particularly noteworthy that with the economic development and population expansion of human beings, the phenomenon of water shortage is becoming more and more serious, which has directly led to the expansion of arid areas and the aggravation of aridification, and the trend of aridification has become a global concern.

Drought is a climatic phenomenon in which the air is dry and the soil is dehydrated due to a long period of lack of rainfall. Drought type in this section.

The World Meteorological Organization (WMO) recognizes the following six types of drought:

Orange Warning for Drought.

1.Meteorological drought: expressed as the absolute value of precipitation over a specific period of time based on insufficient precipitation.

2.Climatic aridity: according to insufficient precipitation, not in a specific amount, expressed in a ratio to the average or normal value.

3.Atmospheric drought: It involves not only precipitation, but also climatic factors such as temperature, humidity, wind speed, and air pressure.

4.Agricultural drought: mainly related to soil moisture content and plant ecology, perhaps the characteristics of a particular crop.

5.Hydrological drought: The main consideration is the reduction of river flow, the reduction of the reservoir capacity of lakes or reservoirs, and the decline of groundwater level.

Red Alert for Drought.

6.Water management drought: It is characterized by water scarcity due to the actual operation of water management or the destruction of facilities.