Spatiotemporal Characteristics of Urban Land Expansion and Population Growth in Africa from 2001 to 2019: Evidence from Population Density Data

Jiang, Shengnan; Zhang, Zhenke; Ren, Hang; Wei, Guoen; Xu, Minghui; Liu, Binglin

doi:10.3390/ijgi10090584

Cited by 21 publications

(13 citation statements)

References 31 publications

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“…In this paper, the proportion of new urban land in different periods, the annual increase in urban land and the annual urban growth rate were calculated to reveal spatiotemporal differences at regional and city levels. Theoretically, urban expansion includes not only the spread of urban land, but also the concentration of population, and there is a clear inconsistency between urban expansion and population expansion [61][62][63][64]. Many studies have found that population and economy play very important roles in urban land expansion [26,65,66]; therefore, it is of value to research the relationship among migration movements, economic growth, and urban land expansion.…”

Section: Current Limitations and The Way Forwardmentioning

confidence: 99%

Dynamic Expansion of Urban Land in China’s Coastal Zone since 2000

Hou

2022

Remote Sensing

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Although a major region with strong urbanization, there is not yet a systematic and comprehensive understanding of urban expansion during the last 20 years for China’s coastal zone. In this paper, based on remote sensing techniques, and using indicators such as new urban land proportion, annual urban increase, and annual growth rate, as well as a landscape expansion index reflecting the urban expansion type (e.g., edge-expansion, infilling, and outlying), we measured the dynamic expansion of urban land in China’s coastal zone since 2000. The results indicated that: (1) China’s coastal zone experienced rapid urbanization from 2000 to 2020, with the new urban land and annual urban growth rate at 17,979.72 km2 and 4.83%, respectively. The new urban land was mainly concentrated in economically advanced regions, such as Bohai Rim, Shandong Peninsula, the Yangtze River delta, and the Pearl River delta. (2) The urban growth rates of coastal cities in Liaoning, Hebei, Shandong, southeast Fujian, and Taiwan became slower over time, with a sharp decline during 2015–2020. In the mid and south of China’s coastal zone, such as coastal cities in Jiangsu, Guangxi, and Hainan, there was slow urbanization before 2015, and urban land expanded dramatically during 2015–2020. (3) The urban expansion of China’s coastal zone was dominated by edge-expansion after 2000, but it went through a low-speed and intensive development stage during 2010–2015, with an increase in urban land less than 50% of that in the other three five-year periods, and the most significant filling of urban space compared with the other three five-year periods, which was probably caused by the global financial crisis. (4) The spatial-temporal differences in the urbanization process in China’s coastal zone were largely consequent on national economic development strategies and regional development plans implemented in China’s coastal zone.

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Section: Current Limitations and The Way Forwardmentioning

confidence: 99%

Dynamic Expansion of Urban Land in China’s Coastal Zone since 2000

Hou

2022

Remote Sensing

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“…To depict the rural settlement-population relationship in the process of rural development, the elasticity coefficient was used to partition the types of coupling development between rural settlement expansion and population growth [55,56]. The elasticity coefficient can be expressed as:…”

Section: Coupling Development Modelmentioning

confidence: 99%

Simulating the Coupling of Rural Settlement Expansion and Population Growth in Deqing, Zhejiang Province, Based on MCCA Modeling

Zhao

Fan

Zhou

et al. 2022

Land

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Analyzing the relationship between rural settlements and rural population change under different policy scenarios is key in the sustainable development of China’s urban and rural areas. We proposed a framework that comprised the mixed land use structure simulation (MCCA) model and the human–land coupling development model to assess the spatiotemporal dynamic changes in rural settlements and its’ coupling relationship with the rural population in the economically developed region of Deqing, Zhejiang Province. The results showed that rural settlements and urban land increased by 14.36 and 29.07 km2, respectively, over the last 20 years. The expansion of some rural settlements and urban land occurred at the cost of cropland occupation. Rural settlements showed an expansion trend from 2000 to 2020, increasing from 42.69 km2 in 2000 to 57.05 km2 in 2020. In 2035, under the natural development scenario, the cropland protection scenario, and the rural development scenario, rural settlements are projected to show an expansion trend and Wukang and Leidian are the key regions with rural settlement expansion. The distance to Hangzhou, nighttime light data, distance to rivers, and precipitation are important factors influencing the expansion of rural settlements. The coupling relationship between rural settlements and the rural population developed in a coordinated manner from 2000 to 2020. For 2035, under different scenarios, the coupling relationship between rural settlements and the rural population showed different trends. In the rural development scenario, the highest number of towns with coordinated development between rural settlements and the rural population is in Deqing, predominantly with Type I coupling. Overall, an important recommendation from this study is that the sustainable development of regional land use can be promoted by controlling the occupation of cropland for urban and rural construction, balancing rural settlement expansion and rural population growth, and formulating land use policies that are more suitable for rural development.

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“…Furthermore, a study conducted by [ 15 ] showed that Ethiopia is exhibiting a high annual rate of urbanization (5.4%). The Ethiopian urban population has more than doubled in the past 20 years, from 7.3 million in 1994 to 18 million in 2022 [ 14 ] with an annual growth rate of 6.82% between 2001 and 2019 [ 16 ], that is higher than the average in Sub-Saharan Africa (4.07%) [ 17 ]. However, the water supply and sanitation provision is not keeping up with the population growth.…”

Section: Introductionmentioning

confidence: 99%

Challenges of sanitation in developing counties - Evidenced from a study of fourteen towns, Ethiopia

Adugna

2023

Heliyon

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Spatiotemporal Characteristics of Urban Land Expansion and Population Growth in Africa from 2001 to 2019: Evidence from Population Density Data

Cited by 21 publications

References 31 publications

Dynamic Expansion of Urban Land in China’s Coastal Zone since 2000

Dynamic Expansion of Urban Land in China’s Coastal Zone since 2000

Simulating the Coupling of Rural Settlement Expansion and Population Growth in Deqing, Zhejiang Province, Based on MCCA Modeling

Challenges of sanitation in developing counties - Evidenced from a study of fourteen towns, Ethiopia

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