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  • Population distribution refers to how populations is distributed unevenly around

  • the globe. Because of this varied distribution, different regions and

  • countries have different population densities. Population density measures

  • the average number of people per square kilometer. The population density in a

  • given country can be calculated by dividing the population by the area of

  • that country. For example is on 2014 Thailand had a population of 68.7

  • million people spread over 513000 square kilometers.

  • When you divide 68.7 million by 513

  • thousand square kilometers you get a population density of one hundred and

  • thirty three point eight people per square kilometer. Patterns of population

  • density can be displayed on a map such as a choropleth map or a dot distribution map.

  • For example this current plate map shows the population density on a

  • global scale. You can see that for places with high population densities are

  • mainly found in the northern hemisphere. As mentioned earlier, some regions are densely

  • populated, while other regions are sparsely populated. For example, in

  • Sichuan Province China, the Sichuan Basin in the east is said

  • to be densely populated. The mountainous western regions of the

  • province is sparsely populated. Factors that encourage high population densities

  • include the following. Regions of low elevation tend to have milder climates

  • which attracts the people. Regions low-lying fertile land are good for

  • agriculture. For example the North China Plain which lies flood plains of the

  • Yangtze and Yellow Rivers. Regions with a good supply of natural resources are rich in

  • resources such as copper and fossil fuels. Coastal areas tend to have a

  • higher population than inland areas. For instance the vast majority of

  • Australians live with 100 kilometers of the coastline. There several reasons for this.

  • Coastal areas have a much milder climate than inland areas.

  • They have rich resources such as fisheries. Coastal areas were also for those areas reached by

  • immigrants, when new countries like Australia, New Zealand and the Americas were first settled.

  • Factors that tend to result in sparse population densities include regions

  • with extreme climates. For example extremely hot dry regions such as the

  • deserts of Western Australia or cold regions such as the polar regions.

  • Regions with high elevation such as the Qinghai-Tibetan plateau. At high

  • altitudes temperatures tend to be cooler and soils are thinner and less fertile.

  • The rugged relief these regions also makes development very difficult. In addition to

  • extreme climates, regions in the interior of continents also tend to have poor access.

  • Regions with dense impenetrable jungles are also sparsely populated.

Population distribution refers to how populations is distributed unevenly around

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B2 中高級

為什麼有些地方的人口密度比其他地方大? (Why do some places have a greater population density than others?)

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    大文 發佈於 2021 年 01 月 14 日
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