Population distribution

Population distribution refers to the manner in which the population is spread across a particular area. This distribution is influenced by various geographical, political, historical, economic, and social factors. People are unevenly distributed across the Earth's surface, with some areas being densely populated while others are sparsely populated or even uninhabited.

In Tanzania, for example, the population distribution varies greatly across different regions. Some regions have higher population densities, while others are less populated. For instance, Dar es Salaam, Mwanza, and Kagera regions have large populations, while Lindi, Njombe, and Katavi are among the least populated regions.

Several factors contribute to the uneven distribution of people across different regions. These factors include:

1. Access to natural resources: Areas rich in natural resources often attract more people due to the availability of raw materials for economic activities.
2. Economic opportunities: Regions offering better employment opportunities, industries, and infrastructure tend to have higher population densities.
3. Social services: Areas with better access to healthcare, education, and other public services are more likely to have a higher population.
4. Soil type: Fertile soils are more likely to support agricultural activities, which can attract a larger population to these regions for farming purposes.

There are various factors that influence population distribution. The following are some of the factors:

1. Geographical factors

   Soil type, climate, vegetation and landscape contribute greatly to the distribution of population. Areas with fertile soils are more populated than areas which are less fertile, for example some areas of the Kilimanjaro Region with volcanic soils are highly populated. Various activities such as agriculture and livestock keeping take place in fertile areas as the soil favours farming and grazing.

   Highland areas are usually less populated compared to lowlands because it is more difficult to construct houses and conduct economic activities in mountainous compared to lowland areas. Areas with moderate temperatures and humidity such as some parts of Kilimanjaro, Arusha, Iringa, Kagera, and Mbeya Regions are densely populated because they are good for agriculture. Arid and semi-arid areas such as Dodoma, Singida, and Tabora Regions have low population because of droughts that affect agriculture and the lives of the people in general. Dense forest areas are home to wild animals and tsetseflies. This situation can affect pastoral activities, so people do not prefer to establish settlements near those areas.

2. Economic factors

   People like to live in areas that allow production activities, such as trade, agriculture, fisheries and industries. Areas with large farms, mining and large cities also attract more people to settle. Many cities, like Dar es Salaam and Mwanza, have among other things, many business opportunities that motivate many people to migrate into those areas. These areas provide employment opportunities. Most retailers prefer to stay in places where markets are widely available.

3. Social factors

   Availability of quality healthcare, education, transport and communication, security as well as markets attract people. For example, the presence of many academic institutions in the city of Dodoma, such as the University of Dodoma (UDOM), the Institute of Rural Development Planning (IRDP), College of Business Education (CBE) and the Mineral Resources Institute (MRI) have contributed significantly to attracting people into the city.

Factors that affect population are attributes that cause the population to increase or decrease in a particular area. There are various factors that affect population such as the increase or decrease of birth rates and death rates; uncontrolled increase of immigrants compared to emigrants; and increase or decrease in life expectancy. These factors are described in detail as follows:

1. Fertility

   This refers to the number of children born in a particular geographical area at a particular time. When children born outnumber those who die, it leads to an increase in population. For example, in many Sub-Saharan African countries fertility rate is high, so there is a growing population. While the decrease in the number of children born leads to a decrease in population. For example, many developed countries have low fertility rates as the result the population size is small.

2. Mortality

   When deaths are higher than the number of children who are born, the population of an area declines. For example, the countries with continued wars or those herd hit by pandemic diseases such as COVID-19 experienced loss of many lives, and hence decline in their population size. So far, decrease in the number of deaths leads to an increase in the population size of the area.

3. Migration

   When the number of immigrants is higher than emigrants, the population of a particular area increases. For example, Tanzania has been receiving refugees and other immigrants from various countries such as Rwanda, Burundi and Democratic Republic of Congo. Therefore, in countries of their origin the population decreases while in Tanzania the population increases.

There are some factors that may affect the population size of a particular geographical area. These factors can be controlled. There are several ways that are used to control population as follows:

1. Reproductive health education should be provided to community members so that they can plan to have a specific number of children. Besides, efforts should be made to prevent early pregnancies by educating the community about its negative effects. In addition, education should be provided to the community about the benefits of having a sufficient and productive workforce in the community;

2. Deaths can be controlled by improving healthcare, nutrition, infrastructure, educating the community about good health and reducing or preventing accidents;

3. The government has to control illegal immigration because it contributes significantly to population growth in a particular area;

4. Improve access to education to youths:

   Access to education services in the country can control population growth. For example, many girls who spend much of their time in schools often do not get into early marriage or have children at a young age. Thus, childbearing age is increased;

Population distribution in Tanzania by 2022