Study on Fractal Characteristics of Migration-Population Flow—Evidence from Egypt

Abstract

Population migration is a major event of optimizing the allocation of production factors and a key way to construct regional relations and promote spatial reconstruction. However, there are few papers published on population migration that have a direct impact on the sustainable development of deserts owing to the more sensitive and complex man–earth relationship. Therefore, it is important to study the laws and characteristics of population migration in such regions. The study of Egypt by Zipf’s law shows that the spatial distribution of migration population size conforms to the law of power function with fractal characteristics of different types. The migration population is generally in a “Pareto” state in spatial distribution. Decentralization power is the leading driving force of spatial distribution, and scale-free regional distribution shows significant spatial agglomeration and gradient. Limited by research scope and “heavy tail” factors, Zipf’s law is not completely applicable. The spatial pattern and flow field characteristics of the migration population are analyzed in this paper by the conversion from “structural fractal” to “spatial fractal” based on scale-free geographic projection, providing the reference for the formulation of population governance policies and spatial planning strategies in Egypt and more desert countries.

Spatial and temporal distribution of population in urban agglomerations changes in China

“…Urbanization, economic development, public service level, life quality, and preferential local policies have impacted urban population growth 2 , 20 . In recent years, the urban spatial structures and economic characteristics have taken noticeable changes 21 , influencing the urban choice intention of residents and enterprises 2 , 22 . After satisfying basic needs, people pursued high-quality public services, excellent infrastructure, quality of life, and more robust local preferential policies.…”

“…Traffic congestion, environmental pollution, high house price), and the population of the megacities is approaching saturation. In recent years, China's population transfer to small and medium-sized cities has increased, which has driven the spatial flow and exchange of factors such as social economy, urban transportation, regional culture and other elements in small and medium-sized cities and play a vital role in accelerating economic development, promoting urbanization and industrialization, and optimizing the geographical allocation of labor resources 22 .…”

The influence of cross-regional medical treatment on total medical expenses, medical insurance payments, and out-of-pocket expenses of patients with malignant tumors in Chinese low-income areas

“…On the one hand, with the global economic development, cultural integration, and climate change, more and more people choose to work, study or settle down in other regions. The concept of a global village has gradually become a reality, resulting in the continuous increase of population migration and mobility [13][14][15][16]. It is worth noting that, although both refer to the geographical or spatial movement of population between two regions, the former usually involves a permanent change in residence or nationality, which naturally leads to a change in the insured region [17].…”

Changes in the spatial distribution of population in urban agglomerations: A spatial-temporal perspective

“…Urban urbanization, economic development, public service level, life quality, and preferential local policies have impacted urban population growth 2,20 . In recent years, the urban spatial structures and economic characteristics have taken noticeable changes 21 , and these changes have affected the urban choice intention of residents and enterprises 2,22 . After satisfying basic needs, people pursued high-quality public service, excellent infrastructure, quality of life, and more robust local preferential policies.…”

“…China's population has shifted to small and medium-sized cities in recent years. These population migrations drive the spatial movement and exchange of social economy, urban transportation, regional culture and other elements in small and medium-sized cities, and play a vital role in accelerating economic development, promoting urbanization and industrialization, and optimizing the geographical allocation of labour resources 22 .…”