The Accelerated Urbanization Process: A Threat to Soil Resources in Eastern China

Li, Jiadan; Deng, Jinsong; Gu, Qing; Wang, Ke; Ye, Fangjin; Xu, Zhihao; Jin, Shuquan

doi:10.3390/su7067137

Cited by 20 publications

(16 citation statements)

References 39 publications

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“…Unfortunately, published sediment yield data from soil erosion are presented in different ways, sometimes to different audiences whether they are scientists or policy makers (Leopold 1968, UNCCD 2008, Li et al 2015, Zhang and Huang 2015. To avoid confusion, this paper defines SSY as an annual area-specific sediment yield measured in units of weights (Mg km −2 yr −1 or tons acre −1 yr −1 ) and area-specific bulked sedimentation volume (SSV) as the annual area-specific sediment yield measured in units of volume (m 3 km −2 yr −1 or acre-feet mile −2 yr −1 ).…”

Section: Methodsmentioning

confidence: 99%

Sediment accumulation expectations for growing desert cities: a realistic desired outcome to be used in constructing appropriately sized sediment storage of flood control structures

Jeong

2019

Environ. Res. Lett.

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Many rapidly urbanizing desert cities (RUDC) around the globe experience an acute risk of flooding. To reduce this risk, properly engineered flood control structures (FCS) must account for sediment accumulation as well as flood waters. While the Phoenix area, USA, uses regional data from nonurban, non-desert watersheds to generate sediment yield rates, the proposed desired outcome for RUDCs is to base FCS on data related to urbanization. Wolman (1967 Geogr. Ann. A 49 385-95) recognized that sediment yields spike during a relatively short period of bare-ground exposure associated with urban growth, followed by surface sealing resulting in a great reduction in sediment yield. This research presents a new analysis of empirical data where two regression models provide estimates of a more realistic sediment accumulation for arid regions and also urbanization of a desert cities: (i) linear regression between drainage area and sediment yield based on a compilation of more than 150 global sediment yield data for warm desert (BWh Köppen-Geiger) climate; and (ii) linear regression relating percent urban growth with sediment yield using available data on urbanizationgenerated sediment associated with growth of a desert city. The new model can be used to predict the realistic sediment accumulation for helping provide data where few data exists in urbanizing parts of arid Africa, southwest Asia, and India.

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Section: Methodsmentioning

confidence: 99%

Sediment accumulation expectations for growing desert cities: a realistic desired outcome to be used in constructing appropriately sized sediment storage of flood control structures

Jeong

2019

Environ. Res. Lett.

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“…However, surrendering land with agriculturally highly productive soils to land-uses other than food production is precisely what is happening. Urban expansion on agricultural lands is recorded around the world (Bagan and Yamagata, 2014), for instance in China (Chen, 2007;Li et al, 2015;Tan et al, 2005), Ghana (Naab et al, 2013), India (Ahmad et al, 2016Fazel, 2000;Goldman, 2011;Pandey and Seto, 2014), Kenya (Mundia and Aniya, 2006), Thailand (Kamal et al, 2017;Losiri et al, 2016), and the United States (Haase and Lathrop, 2003;Mar Lopez et al, 2001). Bren d'Amour et al (2017) estimate that urban encroachment of urban expansion on agricultural land will destroy c. 2% of the Earth's soils by 2030 (0.3m km 2 ) unless current drivers are mitigated (see also Vliet et al, 2017).…”

Section: Urban Expansion On Land With Soils Twice As Productive As Thmentioning

confidence: 99%

Global urbanization and food production in direct competition for land: Leverage places to mitigate impacts on SDG2 and on the Earth System

Barthel

Isendahl

Vis

et al. 2019

The Anthropocene Review

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Global urbanization and food production are in direct competition for land. This paper carries out a critical review of how displacing crop production from urban and peri-urban land to other areas – because of issues related to soil quality – will demand a substantially larger proportion of the Earth’s terrestrial land surface than the surface area lost to urban encroachment. Such relationships may trigger further distancing effects and unfair social-ecological teleconnections. It risks also setting in motion amplifying effects within the Earth System. In combination, such multiple stressors set the scene for food riots in cities of the Global South. Our review identifies viable leverage points on which to act in order to navigate urban expansion away from fertile croplands. We first elaborate on the political complexities in declaring urban and peri-urban lands with fertile soils as one global commons. We find that the combination of an advisory global policy aligned with regional policies enabling robust common properties rights for bottom-up actors and movements in urban and peri-urban agriculture (UPA) as multi-level leverage places to intervene. To substantiate the ability of aligning global advisory policy with regional planning, we review both past and contemporary examples where empowering local social-ecological UPA practices and circular economies have had a stimulating effect on urban resilience and helped preserve, restore, and maintain urban lands with healthy soils.

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“…Briefly, eight variables (soil texture, soil depth, soil organic matter (SOM), total nitrogen (TN), available phosphorus (AP), available potassium (AK), pH and slope) were selected and aggregated into an integrated soil quality index (Appendix A) to describe the potential for soil productivity and cultivation suitability. The detailed procedure can be found in Li et al [11]. Water accounted for 11.3% of the entire Ningbo administrative region.…”

Section: Soil Quality Assessmentmentioning

confidence: 99%

Assessment on the Impact of Arable Land Protection Policies in a Rapidly Developing Region

Zhang

et al. 2016

IJGI

Self Cite

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Abstract:To investigate the effect of arable land protection policies in China, a practical framework that integrates geographic information systems (GIS), soil quality assessment and landscape metrics analysis was employed to track and analyze arable land transformations and landscape changes in response to rampant urbanization within the Ningbo region (China) from 2005 to 2013. The results showed that arable land loss and degradation have continued, despite the development of a comprehensive legal framework for arable land protection. The implementation of arable land protection policies is judged to be effective, but not entirely successful, because it guarantees the overall amount of arable land but does not consider soil quality and spatial distribution. In addition, there are distinct variations in arable land change dynamics between two temporal intervals. From 2005-2009, the transformation of arable land was diversified, with intensified conversion among arable land, built-up land, water and orchards. Moreover, many new arable land parcels were adjacent to built-up land, and are in danger of being occupied again through urban sprawl. By 2009-2013, most of the arable land was occupied by urban expansion, whereas a majority of newly increased arable land was reclaimed from coastal tideland. Although the newly increased arable land was contiguous and far from the urban area, it is of poor quality and has limited use. The permanent loss of high-quality arable land due to intensified urban sprawl may threaten sustainable development and food security on a larger scale.

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The Accelerated Urbanization Process: A Threat to Soil Resources in Eastern China

Abstract: Abstract:The eastern coastal region

Cited by 20 publications

References 39 publications

Sediment accumulation expectations for growing desert cities: a realistic desired outcome to be used in constructing appropriately sized sediment storage of flood control structures

Sediment accumulation expectations for growing desert cities: a realistic desired outcome to be used in constructing appropriately sized sediment storage of flood control structures

Global urbanization and food production in direct competition for land: Leverage places to mitigate impacts on SDG2 and on the Earth System

Assessment on the Impact of Arable Land Protection Policies in a Rapidly Developing Region

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