What is the impact of the uneven distribution of water resources in time and space on the utilizatio

1. Cause inconvenience of production and domestic water in water-scarce areas and water-scarce periods.

2. It is necessary to transfer water across river basins and build reservoirs, which is a large amount of work and consumes money; It also wastes water resources.

Affected by the monsoon climate, the distribution of precipitation in China is uneven, which leads to the uneven distribution of seasonal distribution and regional distribution of water resources in China.

The uneven distribution of water resources in time and space is the main feature of water resources in China. Although China's annual average total water resources are trillions of cubic meters, ranking sixth in the world, the per capita water resources occupancy is only 2,185 cubic meters, less than 1 3 of the world average, and the per capita occupancy of the Yellow River, Huai River, Haihe River and other river basins is even lower. The temporal distribution of water resources is extremely uneven, and the precipitation in the four months of the annual flood season accounts for 60 80 percent of the annual flood season in most areas, which is prone to spring drought and summer flooding.

The spatial distribution of water resources is also very uneven, and does not match the distribution of population, land and economy in China, with the population in the northern region accounting for 47, arable land accounting for 65, and GDP accounting for 45, but water resources accounting for only 19.

The above characteristics determine that China's economic and social development and water resources should adapt to and coordinate with each other. On the whole, after years of unremitting efforts, China's water conservancy undertakings have made tremendous achievements, effectively coping with floods and droughts and other disasters, basically meeting the water needs of economic and social development, and providing a strong guarantee for promoting the steady and rapid development of the national economy, ensuring the safety of the people's lives and property, promoting the steady increase in grain production and the sustained increase in farmers' income, and ecological and environmental construction.

1. Natural causes: The northern region is mainly located in the temperate monsoon climate zone, the distribution of precipitation seasons is uneven, rainy in summer and less rainy in winter, and the total amount of precipitation is generally less than 1000mm, and the amount of precipitation is not much. Coupled with global warming, evaporation has increased, resulting in a decrease in the total amount of water remaining.

2. Human causes: a large amount of water use and domestic water use in industry and agriculture have increased; Waste is high; over-exploitation of groundwater; Destruction of vegetation and wetlands, reduction of surface and underground water storage, etc.

Rule: When solving resource problems, the cause analysis generally starts from the two aspects of nature and man-made, the natural cause is the origin, and the complex human factor is also the direct cause of the problem.

Reading the map analysis shows that:

1) The uneven distribution of water resources in China is mainly characterized by more summer and autumn, less winter and spring, and large interannual variation The main measure to solve the problem of uneven spatial distribution of water resources in China is to implement water diversion projects, and the main measure to solve the problem of uneven time distribution of water resources in China is to build reservoirs

2) Conserve water.

Everyone has a responsibility In terms of rational use of water and protection of water resources, as citizens, we should use water rationally, save water, pay attention to the treatment and discharge of sewage, and strengthen publicity

3) The basic national conditions of China's land resources.

Yes: the total amount is large, and the per capita share is small; All kinds of land resources in China are complete, forming a variety of land types such as cultivated land, forest land, grassland, etc., the proportion of various land resources in the total land resources is different, the proportion of cultivated land and forest land is small, the grassland area is large, the proportion of land that is difficult to use is large, and the reserve land resources are insufficient

4) China's national land policy is to "cherish and rationally use land and effectively protect cultivated land".

5) Agriculture is the foundation of the national economy, and industry is the leading factor of the national economy; Coal is the "food of industry"; The level of development of high-tech industries is a measure of a country's comprehensive national strength.

important signs

Therefore, the answer is: (1) the summer and autumn seasons are large, and the winter and spring seasons are small; implementation of water diversion projects; construction of reservoirs; (2) Rational use of water, water conservation, attention to the treatment and discharge of sewage, strengthen publicity, etc.; （3）c；(4) Cherish and rationally use land and effectively protect cultivated land; （5）√；

The imbalance in the distribution of water resources in China in time and space is manifested in ().

a.Precipitation is concentrated in winter, and the water resources in the southern part of the east are relatively abundant, while the northern part of the west is severely poor.

b.Precipitation is concentrated in summer, with relatively abundant water resources in the eastern and southern regions and severe scarcity in the northern western regions.

c.Precipitation is concentrated in summer, and water resources are severely scarce in the eastern and southern regions, while the western and northern regions are relatively abundant.

d.Precipitation is concentrated in spring, and water resources are severely scarce in the eastern and southern regions, while the western and northern regions are relatively abundant.

Correct answer: B

Hello:1: It will lead to a decrease in water resource utilization; 2:

It will lead to the exacerbation of drought and flood disasters. There is more arable land in the south and less in the north, and the northern region of China also occupies a lot of arable land, but there is little water in the north, so it has a certain impact on agriculture. Precipitation is more concentrated in summer, the river water rises sharply during the flood season, so that most of the water resources flow into the sea in vain, the precipitation in winter and spring is less, the river enters the dry period, and the lakes in some areas in the north may dry up, causing drought and water shortage.

Hope it helps.

The spatial and temporal distribution of water resources in China is extremely uneven, which is manifested as follows:

The spatial and temporal distribution of water resources in China is characterized by unbalanced regional distribution: "more in the east and less in the west, more in the south and less in the north", and time distribution: more in summer and autumn, less in winter and spring, and large interannual variation.

The expansion of China's water resources is as follows:

China's total water resources rank sixth in the world, second only to Brazil, the Soviet Union, Canada, the United States, and Indonesia. The average annual runoff per capita is 2,670 cubic meters, equivalent to one-quarter of the world average, and the average annual runoff per mu of cultivated land is 1,800 cubic meters, equivalent to about two-thirds of the world average.

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 86% of the freshwater resources are difficult to use, together with the unusable mountain glaciers and permafrost snow. The freshwater resources that humans can really use are some of the rivers, lakes and groundwater, which are only as good as the total amount of water on the earth.

China's water resources are mainly found in surface water ecosystems and groundwater ecosystems such as rivers, lakes, reservoirs and swamps. The river ecosystems mainly include the Songhua River, the Liao River, the Hai River, the Yellow River, the Huai River, the Yangtze River, the Pearl River, etc.

The freshwater lake ecosystems mainly include Taihu Lake, Poyang Lake, Dongting Lake, Hongze Lake, Chaohu Lake, Honghu Lake, Nansi Lake, Baiyangdian Lake, Hulun Lake, Changbai Mountain Tianchi, Jingpo Lake, Dianchi Lake, Bosten Lake, etc. The total amount of water resources is relatively abundant, but the per capita and per mu of cultivated land is small. The average annual precipitation in China is 6,085.4 billion cubic meters, equivalent to a precipitation depth of 643 millimeters.

The total annual average water resources are 2,774.1 billion cubic meters, ranking sixth in the world, of which surface water resources are 2,669.1 billion cubic meters, equivalent to a runoff depth of 282 millimeters, and groundwater resources are 808.7 billion cubic meters. China has a vast territory and a large population, with a per capita water resource of 2,200 cubic meters, which is only 1.4 of the world averageThe average water resources per mu of cultivated land is 1,440 cubic meters, which is 60% of the world average.