Exploring the impact of high speed railways on the spatial redistribution of economic activities - Yangtze River Delta urban agglomeration as a case study

2016 ◽  
Vol 57 ◽  
pp. 194-206 ◽  
Author(s):  
Xijing Li ◽  
Bo Huang ◽  
Rongrong Li ◽  
Yipei Zhang
Keyword(s):  
Yangtze River ◽  
High Speed ◽  
Yangtze River Delta ◽  
River Delta ◽  
Urban Agglomeration ◽  
Economic Activities ◽  
Spatial Redistribution ◽  
The Impact

scholarly journals The Impacts of Farmland Loss on Regional Food Self-Sufficiency in Yangtze River Delta Urban Agglomeration over Last Two Decades

2021 ◽  
Vol 13 (17) ◽  
pp. 3514
Author(s):  
Xuelin Duan ◽  
Qingxiang Meng ◽  
Xufeng Fei ◽  
Meng Lin ◽  
Rui Xiao
Keyword(s):  
Food Security ◽  
Yangtze River ◽  
High Speed ◽  
Yangtze River Delta ◽  
Google Earth ◽  
River Delta ◽  
Urban Agglomeration ◽  
Rapid Urbanization ◽  
Self Sufficiency ◽  
Farmland Loss

Food security is essential for human survival and sustainable development. Due to rapid urbanization and industrialization, the farmland loss in Yangtze River Delta Urban Agglomeration (YRDUA) has threatened food security. Thus, this study intended to quantify the farmland loss and assess its impacts on food security in the YRDUA from 2000 to 2020 at three scales based on the Google Earth Engine platform. Our results show that the area of farmland in YRDUA is decreasing at a rather high speed in the past 20 years and the trend is getting worse. At the urban agglomeration scale, there was a farmland deficit of 0.44 million ha in 2000, followed by larger farmland deficits in 2010 and 2020. At the city scale, Shanghai had the largest scarcity of farmland. At the urban subgroup scale, Subgroup I in the west and Subgroup II in the north always maintained an oversupply of farmland, while Subgroup III in the east and Subgroup IV in the south faced serious food security problems. Our study suggests that farmland must be protected in YRDUA in order to ensure food self-sufficiency and promote regional sustainability.

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