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Application of geophysical methods in fine detection of urban concealed karst:A case study of Wuhan City,China
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作者 Dao-han Liu Lei Wang +3 位作者 Lei Liu Jun-jie Xu Jian-qiang Wu Pan Liu 《China Geology》 CAS CSCD 2024年第3期517-532,共16页
The construction of modern livable cities faces challenges in karst areas,including ground collapse and engineering problems.Wuhan,with a population of 13.74×10^(6) and approximately 1161 km^(2)of soluble rocks i... The construction of modern livable cities faces challenges in karst areas,including ground collapse and engineering problems.Wuhan,with a population of 13.74×10^(6) and approximately 1161 km^(2)of soluble rocks in the urban area of 8569.15 km^(2),predominantly consists of concealed karst areas where occasional ground collapse events occur,posing significant threats to underground engineering projects.To address these challenges,a comprehensive geological survey was conducted in Wuhan,focusing on major karstrelated issues.Geophysical methods offer advantages over drilling in detecting concealed karst areas due to their efficiency,non-destructiveness,and flexibility.This paper reviewed the karst geological characteristics in Wuhan and the geophysical exploration methods for karst,selected eight effective geophysical methods for field experimentation,evaluated their suitability,and proposed method combinations for different karst scenarios.The results show that different geophysical methods have varying applicability for karst detection in Wuhan,and combining multiple methods enhances detection effectiveness.The specific recommendations for method combinations provided in this study serve as a valuable reference for karst detection in Wuhan. 展开更多
关键词 Ground Penetrating Radar(GPR) Electric Resistivity Tomography(ERT) Opposing-coils Transient Electromagnetic Method(OCTEM) Microtremor Array Measurements(MAM) Multi-channel Analysis of surface wave(MASW) Multi-source surface wave exploration(MSSW) Electromagnetic wave CT(EM CT) Surface Nuclear Magnetic Resonance(SNMR) Concealed karst urban geological survey engineering
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Survey of China's Urban Consumption
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《China's Foreign Trade》 2000年第1期31-33,共3页
FromDecember1998toJune1999,theChinaMarketSupervisionundertheStateStatisticsBureauconductedsurveysontheconsumptiontrendsandlivesofChina'surbanresidentsamong5,000consumersin20cities,includingBeijing,Shanghai,Chengdu... FromDecember1998toJune1999,theChinaMarketSupervisionundertheStateStatisticsBureauconductedsurveysontheconsumptiontrendsandlivesofChina'surbanresidentsamong5,000consumersin20cities,includingBeijing,Shanghai,Chengdu,Guangzhou,Wuhan,Naming,Qingdao,Dalia... 展开更多
关键词 survey of China’s urban Consumption
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Survey of Shopping Streets as Basic Knowledge for Revitalizing the Old Town Centre of Parma
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作者 Andrea Ghiretti Chiara Vernizzi 《Journal of Civil Engineering and Architecture》 2010年第3期46-56,共11页
The revitalization of the historic fabric should not be considered only a matter of safeguarding the cultural heritage of collective memory; it will mainly be to recover and value an urban life, as in the urban contex... The revitalization of the historic fabric should not be considered only a matter of safeguarding the cultural heritage of collective memory; it will mainly be to recover and value an urban life, as in the urban context, the historic centre plays a function of social identification and recognition of the community, that commercial distribution helps to keep alive. It is widely spreading the concept of Old Town as Natural Shopping Centre: with this word, we define commercial complex and not homogenous places, developed over time without programming unit. designed as a unique space, which fall within a certain urban perimeter, work together as a business, financial administration, facilities and service all coordinated by a common policy development. In order to recover the vitality of the consolidated tissue of the city of Parma, the Town Council has started to study its historic centre as Natural Shopping Centre, relying on the potential inherent in the existing commercial streets. 展开更多
关键词 Historical town urban survey. Natural Shopping Centre (NSC) curtains building
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Evaluation of urban underground space resources using a negative list method: Taking Xi'an City as an example in China 被引量:9
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作者 Mao-sheng Zhang Hua-qi Wang +3 位作者 Ying Dong Lin Li Ping-ping Sun Ge Zhang 《China Geology》 2020年第1期124-136,共13页
Utilization of urban underground space has become a vital approach to alleviate the strain on urban land resources,and to optimize the structure and pattem of the city.It is also very important to improve the city env... Utilization of urban underground space has become a vital approach to alleviate the strain on urban land resources,and to optimize the structure and pattem of the city.It is also very important to improve the city environment,build livable city and increase the capacity of the city.Based on the analysis of existing evaluation methods and their problems,a method for evaluating underground space resources based on a negative list of adverse factors affecting underground space development is proposed,to be primarily used in urban planning stages.A list of the adverse factors is established,including limiting factors,constraining factors and influencing factors.Taking Xi'an as an example,using a geographical information system platform,a negative list of adverse factors for the underground space resources in Xi'an City are evaluated,and preventive measures are proposed.Natural resources,exploitable resources,and the potential growth of exploitable underground space resources are evaluated.Underground space assessment in the different development stages of the city,collaborative utilization and safety evaluation for multiple subsurface resources,environmental impact and assessment,as well as evaluation methods based on big data and intelligent optimization algorithms are all discussed with the aim of serving city planning and construction. 展开更多
关键词 urban geology Negative list Natural resources for underground space Exploitable resources for underground space 3D geological structure model GIS platform urban geological survey engineering Xi'an City Shaanxi Province China
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Distribution and impacts on the geological environment of antiviral drugs in major waters of Wuhan,China 被引量:2
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作者 Jun He Tong Feng +7 位作者 Liang Tao Yue-e Peng Lei Tong Xin-wen Zhao Xin Shao Lin-ya Xu Yan-lin Yang Yong-bo Zhao 《China Geology》 CAS 2022年第3期402-410,共9页
This study investigated water samples collected from the surface water and groundwater in Wuhan City,Hubei Province,China in different stages of the outbreak of the coronavirus disease 2019(hereinafter referred to as ... This study investigated water samples collected from the surface water and groundwater in Wuhan City,Hubei Province,China in different stages of the outbreak of the coronavirus disease 2019(hereinafter referred to as COVID-19)in the city,aiming to determine the distribution characteristics of antiviral drugs in the city’s waters.The results are as follows.The main hydrochemical type of surface water and groundwater in Wuhan was Ca-HCO3.The major chemical components in the groundwater had higher concentrations and spatial variability than those in the surface water.Two antiviral drugs and two glucocorticoids were detected in the surface water,groundwater,and sewage during the COVID-19 outbreak.Among them,chloroquine phosphate and cortisone had higher detection rates of 32.26%and 25.80%,respectively in all samples.The concentrations of residual drugs in East Lake were higher than those in other waters.The main drug detected in the waters in the later stage of the COVID-19 outbreak in Wuhan was chloroquine phosphate,whose detection rates in the surface water and the groundwater were 53.85%and 28.57%,respectively.Moreover,the detection rate and concentration of chloroquine phosphate were higher in East Lake than in Huangjia Lake.The groundwater containing chloroquine phosphate was mainly distributed along the river areas where the groundwater was highly vulnerable.The residual drugs in the surface water and the groundwater had lower concentrations in the late stage of the COVID-19 outbreak than in the middle of the outbreak,and they have not yet caused any negative impacts on the ecological environment. 展开更多
关键词 Water environment Antiviral drugs COVID-19 GROUNDWATER urban geological survey engineering Envionment geological survey engineering WUHAN Hubei Province China
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An overview report on the situation of elderly people in urban and rural China:2000-2015
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作者 Yu Fang Haitao Wang Zheng Ouyang 《China Population and Development Studies》 2019年第1期323-345,共23页
China had become a country with an aging population by the end of the 20th century.Dealing with the aging of its population is a long-term strategic task for China.“The National Survey on Elderly People in Urban and ... China had become a country with an aging population by the end of the 20th century.Dealing with the aging of its population is a long-term strategic task for China.“The National Survey on Elderly People in Urban and Rural China”has been carried out four times since the year 2000.The data shows that during the years 2000 to 2015 the wellbeing of elderly people in urban and rural China improved greatly.The economic status of the elderly has obviously improved;and there have also been steady improvements to social security protections,health care services and the availability of social activities in which the elderly can participate.In addition,the spiritual and cultural life of the elderly has become richer and more colorful.The aging of society creates challenges,such as potential shortages of labor resources,the weakening of family functions and the need for more medical care facilities and services,and these intensify over time.At the same time,changes to the structure of demand and of industry caused by societal aging bring many opportunities. 展开更多
关键词 Elderly people Population aging The National survey on Elderly People in urban and Rural China
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