Effects of Urbanization Expansion on Landscape Pattern and Region Ecological Risk in Chinese Coastal City: A Case Study of Yantai City

Zhou, Di; Shi, Ping; Wu, Xiaoqing; Ma, Jiehua; Yu, Junbao

doi:10.1155/2014/821781

Cited by 28 publications

(20 citation statements)

References 22 publications

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“…Compared with the traditional ERA, LERA provided a special focus on spatial heterogeneity. So far, research on various landscapes, such as forests [11], coastal areas [4], arid desert areas [12], national parks [13], cities [14][15] and mining areas [16], have been performed. The key step of a LERA is to establish the ecological risk index (ERI).…”

mentioning

confidence: 99%

Spatiotemporal Variations of Land Use and Landscape Ecological Risk in a Resource-Based City, from Rapid Development to Recession

Zhou¹,

Chang²,

Hu³

et al. 2019

Pol. J. Environ. Stud.

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A healthy ecosystem provides various ecological services for human beings and it is the foundation for the sustainable development of human society. However, human activities and natural disasters inevitably interfere with the evolution of an ecosystem at different scales [1-2]. Ecological risk refers to the possibility that the ecosystem structure and function will be degenerated under external pressure [3]. Ecological risk assessment (ERA) is an effective method for quantifying

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mentioning

confidence: 99%

Spatiotemporal Variations of Land Use and Landscape Ecological Risk in a Resource-Based City, from Rapid Development to Recession

Zhou¹,

Chang²,

Hu³

et al. 2019

Pol. J. Environ. Stud.

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“…The urbanization for last four decades (1989 to 2013) of the district was analysed. Annual expansion rate for the different time periods (1989-2000, 2000-13 and 1989-2013) were calculated and urbanization index were prepared for district and selected towns using following equation [21]:…”

Section: Methodsmentioning

confidence: 99%

A Geospatial Approach to Analyze the Impact of Population Growth on Bundelkhand Landscape, Central India

Patel

Tripathi

2016

IJARSG

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Population growth drives the process of urbanization and associated landscape changes. The conversion of natural landscape to anthropogenic landscape represents the most visible and pervasive form of human impact on the environment. The impact of population growth on Bundelkhand Landscape, Central India was analyzed using Landsat series satellite and MODIS Terra products. Population growth (total, urban and rural), landscape changes and variability in land surface temperature were analyzed for the last decades. The population has been increased manifold since 1901 and urbanization has also increased with the rate of 1.4km 2 a -1 during last 24 years. This increase was rapid in current years (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013) as compared to previous years (1989 -2000). Due to rapid population growth, forest cover has been reduced by ~54% while agricultural land has been increased by ~76%. The mean land surface temperature has also increased by ~0.5 o C during last 14 years (2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014). It is observed that the population growth was proportional to the growth of agriculture land (r = 0.91, p < 0.05, n = 4) and the built up area (r = 0.94, p < 0.05, n = 4) while inversely proportional to the forest resources (r = -0.99, p < 0.001, n = 4). The study indicates the phenomena "human environment interaction" where rapid population growth has lead LULC changes. This study also reveals that population growth is imposing an increasing burden on the limited and continually degrading natural resources thus altering the local environment.

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“…The urban environmental water security index (UEWSI) was calculated on the basis of intensity indices [43][44][45][46] which explain the degree of change in average ecosystem service value (ESV) in each borough (an administrative block comprising several lowest administrative units called wards) of the Kolkata Municipal Corporation and East Kolkata Wetlands for the given period of time.…”

Section: Urban Environmental Water Security Indexmentioning

confidence: 99%

“…Regulating ES are responsible for stability and resilience of the flow of other ES [48]. Decrease in regulating ES which was observed in the Kolkata Municipal Corporation area during the post-monsoon seasons of the total observation period (2009-2019) (Figure 7) can be linked with the loss of vegetation and inland wetlands in the city area (Figure 6 and Table 8) [45][46][47]. The reduction in values of regulating ES leads to the increase in volumes of surface water runoff and thus increases the vulnerability to water flooding [8,47].…”

Section: Effect Of Changes In Values Of Individual Ecosystem Servicesmentioning

confidence: 99%

Assessment of Environmental Water Security of an Asian Deltaic Megacity and Its Peri-Urban Wetland Areas

et al. 2021

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Achieving urban water security requires sustaining the trade-offs between the exploitation of water/environmental resources and ecosystem services. This achievement not only reduces the pollution and contamination in the environment, level of water stress, but also secures good ambient water quality and future for people’s well-being and livelihoods. Changes in land use and land cover and growth of impervious structures can immediately generate severe ecological and social issues and increase the level of natural or manmade risks, affecting the condition of ecosystem services within and in the vicinity of an urban region. As a result of these transformations and further exploitation, due to the growing anthropogenic pressure, surface water and groundwater quality can be deteriorated compared to ambient water quality standards (for both chemical and biological pollutants). Based on land use and land cover (LULC) data retrieved from remote sensing interpretation, we computed the changes of the ecosystem service values (ESV) associated with the LULC dynamics, water quality and, finally, urban water security during the pre- and post-monsoon periods of 2009, 2014 and 2019 in Kolkata, an Asian deltaic megacity, and its peri-urban wetlands named East Kolkata Wetlands (EKW). The area under wetlands reduced comprehensively in 2009–2019 due to the conversion of wetlands into various other classes such as urban settlement, etc. The quality of surface water bodies (such as rivers, lakes, canals and inland wetlands) deteriorated. The groundwater quality is still under control, but the presence of arsenic, manganese and other metals are a clear indication of urban expansion and related activities in the area. As a result, there was a change in the ESV during this timeframe. In the pre-monsoon period, there was an increase in total ESV from US$53.14 million in 2009 to US$53.36 million and US$59.01 million in 2014 and 2019, respectively. In the post-monsoon period, the ESV decreased from US$67.42 million in 2009 to US$64.13 and US$61.89 million in 2014 and 2019, respectively. These changes can be attributed to the peri-urban wetlands and the benefits or services arising out of them that contribute more than 50% of the total ESV. This study found that the area under wetlands has reduced comprehensively in the past 10 years due to the conversion of wetlands for various other uses such as urban expansion of the Kolkata City, but still, this peri-urban wetland supports the urban water security by providing sufficient ecosystem services. In conclusion, the transformation in extent of the water-related ecosystem is a crucial indicator of urban water security, which also measures the quantity of water contained in various water-related ecosystems. Quantitative analysis of the LULC change, hence, is important for studying the corresponding impact on the ecosystem service value (ESV) and water quality that helps in decision-making in securing urban water future and ecosystem conservation.

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Effects of Urbanization Expansion on Landscape Pattern and Region Ecological Risk in Chinese Coastal City: A Case Study of Yantai City

Cited by 28 publications

References 22 publications

Spatiotemporal Variations of Land Use and Landscape Ecological Risk in a Resource-Based City, from Rapid Development to Recession

Spatiotemporal Variations of Land Use and Landscape Ecological Risk in a Resource-Based City, from Rapid Development to Recession

A Geospatial Approach to Analyze the Impact of Population Growth on Bundelkhand Landscape, Central India

Assessment of Environmental Water Security of an Asian Deltaic Megacity and Its Peri-Urban Wetland Areas

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