Analysis of Factors in Land Subsidence in Shanghai: A View Based on a Strategic Environmental Assessment

Xu, Ye‐Shuang; Ren, Dong-Jie; Wu, Huai-Na

doi:10.3390/su8060573

Cited by 133 publications

(51 citation statements)

References 36 publications

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“…In light of the characteristics of various potential risks in pluvial flooding hazards induced by temperature variations and sea level changes, different engineering treatment technologies should be adopted [72][73][74][75][76][77][78]. The main weather system induced torrential rainfalls in Shanghai is classified under one of the following categories: "the stationary front", "warm sector", "low pressure", and "the typhoon" [47].…”

Section: Engineering Treatment Technologymentioning

confidence: 99%

“…Due to the impacts of rapid urbanisation, sediment depositions, and deterioration due to siltation, the length of rivers in Shanghai has decreased from the year 1843. The total length of Shanghai rivers is now approximately 24,915 km, and the total area of these rivers is 642.7 km 2 [77]. If countermeasures such as dredging sediment depositions, connecting and deepening the rivers are adopted, the water storage capacity can increase, thus mitigating pluvial flooding.…”

Section: Engineering Treatment Technologymentioning

confidence: 99%

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Sustainable Measures for Mitigation of Flooding Hazards: A Case Study in Shanghai, China

Yao

Arulrajah

2017

Water

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Global warming induces temperature variations and sea level changes for a long period of time. Many coastal cities around the world have experienced the harmful consequences of sea level changes and temperature variations. The city of Shanghai in China also suffers from the serious consequences of these two climatic factors. The geological and climatic conditions of Shanghai make it sensitive to flooding risks during heavy rainfall events. This paper analyses the conditions of sea level changes, temperature variations, and heavy rainfall events in Shanghai. Correspondingly, eustatic sea level change, tectonic movement of the continent, and land subsidence in Shanghai have effects on sea level changes. Correlation analysis indicates extraordinary short duration rainfall events have a relationship with temperature variations due to global warming. Moreover, the number of extraordinary torrential rainfall events also has a correlation with sea level changes. Pluvial flooding and potential damage to coastal structures are more likely to have serious effects as the number of flooding hazard events due to global warming and sea level changes increases. This study also established that to efficiently protect the environment, control economic losses, and prevent potential hazards, extra countermeasures including monitoring, forecasting, and engineering technology treatment should be adopted. Monitoring measurements combined with a database system on a website was found to be useful for forecasting and simulating flooding hazards. For systematic sustainable urban water system management, appropriate treatment technologies, such as sustainable urban water system, which can control and manage water quantity and quality, namely "the Sponge City", should also be considered.

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Section: Engineering Treatment Technologymentioning

confidence: 99%

Section: Engineering Treatment Technologymentioning

confidence: 99%

Sustainable Measures for Mitigation of Flooding Hazards: A Case Study in Shanghai, China

Yao

Arulrajah

2017

Water

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“…Additionally, in the hilly region, the bedrock fissure water widely distributed across an area of 743.3 km 2 usually has a very high piezometric level [52][53][54][55][56][57]. It is worth noting that the well-developed river network combined with the high precipitation provides abundant water resources that may worsen the geological conditions during shield tunneling [58][59][60][61][62][63][64][65][66].…”

Section: Hydrogeology and Engineering Geology Of Guangzhoumentioning

confidence: 99%

Fractal Prediction of Grouting Volume for Treating Karst Caverns along a Shield Tunneling Alignment

et al. 2017

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Karst geology is common in China, and buried karst formations are widely distributed in Guangdong province. In the process of shield tunneling, the abundant water resources present in karst caverns could lead to the potential for high water ingress, and a subsequent in situ stress change-induced stratum collapse. The development and distribution of karst caverns should therefore be identified and investigated prior to shield tunnel construction. Grouting is an efficient measure to stabilize karst caverns. The total volume of karst caverns along the shield tunneling alignment, and its relationship with the required volume of grouts, should be evaluated in the preliminary design phase. Conventionally, the total volume of karst caverns is empirically estimated based on limited geological drilling hole data; however, accurate results are rarely obtained. This study investigates the hydrogeology and engineering geology of Guangzhou, the capital of Guangdong province, and determines the fractal characteristics of the karst caverns along the tunnel section of Guangzhou metro line no. 9. The karst grouting coefficients (V R ) were found to vary from 0.11 in the case of inadequate drilling holes to 1.1 in the case where adequate drilling holes are provided. A grouting design guideline was furthermore developed in this study for future projects in karst areas.

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“…Shanghai is on the estuary of Yangtze River, surrounded by East Sea and Yellow Sea, the subsoil in Shanghai is like a sponge with abundant groundwater and surface water (Xu et al 2016). As a coastal city, Shanghai has been suffering from flooding hazards and waterlogging problems every summer.…”

Section: Spc Construction In Shanghaimentioning

confidence: 99%

Discussion on Sponge City Construction under the Circumstance of Urban Waterlogging

Lyu¹,

Shen²,

Sun³

et al. 2017

dtmse

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Urban waterlogging caused by flooding hazards is becoming a severe phenomenon for the urbanization of society. To address the challenging problem of urban waterlogging, the strategy of Sponge City (SPC) was put forward. Based on the discussion of Sponge City development, this paper analyzed the Sponge City construction in Shanghai. The analysis indicates that SPC construction is helpful to improve the resilience of Northern cities to flooding disasters, with two potential associated issues: drought disaster and urban waterlogging. Sponge city can absorb rainwater during heavy rainfalls and reuse the useful water to resist drought disasters. For cities which have intensive river systems, taking advantage of river systems to quickly discharge rainwater is an effective way in the process of SPC construction. SPC construction is a long-term complicated process at the system-level. The construction of Sponge City projects should formulate and adjust specific measures to local urban conditions, rather than formulating the uniform strategy. Vigorous and effective strategies should be developed and implemented to cope with the unfavorable situations of aggravating water disasters in urban areas in China.

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Analysis of Factors in Land Subsidence in Shanghai: A View Based on a Strategic Environmental Assessment

Cited by 133 publications

References 36 publications

Sustainable Measures for Mitigation of Flooding Hazards: A Case Study in Shanghai, China

Sustainable Measures for Mitigation of Flooding Hazards: A Case Study in Shanghai, China

Fractal Prediction of Grouting Volume for Treating Karst Caverns along a Shield Tunneling Alignment

Discussion on Sponge City Construction under the Circumstance of Urban Waterlogging

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