Through investigating current sea use in coastal cities of China,and exploring foreign and domestic researches on sea use,this paper took Binhai New Area of Tianjin City for example to analyze major problems of its se...Through investigating current sea use in coastal cities of China,and exploring foreign and domestic researches on sea use,this paper took Binhai New Area of Tianjin City for example to analyze major problems of its sea use in ecological security,planar form,land use layout,specialized planning,management and regulatory mechanism,then proposed strategies from 4 perspectives,namely ecological conservation and restoration,optimization of planning planar form,optimization of planning land use layout,and planning management,in order to provide references and instructions for the sea use planning of Chinese coastal cities.展开更多
Compared with the stagnanteconomy of the rest world,Asian-Pa-cific economy has been experiencingthe hightest growth since the 1980s.Now,most researchers and officials,and even entrepreneurs believe
Taking Tianjin as an example,this paper proposed a methodology and process for evaluating near-fault strong ground motions from future earthquakes to mitigate earthquake damage for the metropolitan area and important ...Taking Tianjin as an example,this paper proposed a methodology and process for evaluating near-fault strong ground motions from future earthquakes to mitigate earthquake damage for the metropolitan area and important engineering structures.The result of strong ground motion was predicted for Tianjin main faults by the hybrid method which mainly consists of 3D finite difference method and stochastic Green's function.Simulation is performed for 3D structures of Tianjin region and characterized asperity models.The characterized asperity model describing source heterogeneity is introduced following the fault information from the project of Tianjin Active Faults and Seismic Hazard Assessment.We simulated the worst case that two earthquakes separately occur.The results indicate that the fault position,rupture process and the sedimentary deposits of the basin significantly affect amplification of the simulated ground motion.Our results also demonstrate the possibility of practical simulating wave propagation including basin induced surface waves in broad frequency-band,for seismic hazard analysis near the fault from future earthquakes in urbanized areas.展开更多
It is imperative to develop a risk assessment system for quickly predicting storm surge disaster due to the vulnerability of Tianjin Binhai New Area. The flood routing model with user-defined breaches was firstly esta...It is imperative to develop a risk assessment system for quickly predicting storm surge disaster due to the vulnerability of Tianjin Binhai New Area. The flood routing model with user-defined breaches was firstly established based on the seed spread algorithm in order to achieve a rapid forecasting of storm surge flood information. Furthermore, fuzzy mathematics was utilized to identify the storm disaster grade, and the hazard mapping was conducted to visually obtain the hazard spatial and temporal distribution. Finally, the flood routing visualization method was proposed based on numerical simulation of storm surge to achieve the reappearance scene of dynamic evolution process. The developed system can play a vital role in the management and decision-making of sea dyke mitigation engineering in Tianjin Binhai New Area.展开更多
With the development and changes of the times,many cities have to face the problem of renewal.However,in the context of globalization,urban renewal also makes urban cultural characteristics and regional characteristic...With the development and changes of the times,many cities have to face the problem of renewal.However,in the context of globalization,urban renewal also makes urban cultural characteristics and regional characteristics inevitably missing.Therefore,we should pay attention to the protection and planning of regional historical and cultural heritages in the process of urban renewal,which plays an important role in the construction of urban characteristics and the shaping of city card.Xigu area of Tianjin also faces the problems of cultural loss and need for reconstruction,its function,layout,industrial structure and land use are adjusted and optimized in this article,with a view to showing the value of historical and cultural heritage and context of regional history.展开更多
[Objective] The research aimed to study winter operation process of the surface flow constructed wetland in Tianjin area.[Method] In view of climate characteristics in Tianjin,by the way of running under the ice,wi...[Objective] The research aimed to study winter operation process of the surface flow constructed wetland in Tianjin area.[Method] In view of climate characteristics in Tianjin,by the way of running under the ice,winter operation experiment of the surface flow constructed wetland in Tianjin was conducted,with the expectation to get some useful process parameters to run such systems in North China in winter.[Result] Although purification effect of the sewage by surface flow constructed wetland in winter was worse than that in other seasons(average reduction of about 20%),surface flow constructed wetland running under the ice was feasible in Tianjin area.When surface flow constructed wetland in North China ran under ice in winter,it was suggested that the outlet must be located in a low position to prevent to be completely frozen,and running water depth should not be less than 50-60 cm.The hydraulic load could be raised on the basis of reflux,and hydraulic retention time should maintain less than 4 d to keep water-soil interface not freezing.Inlet water depth should be increased as much as possible to improve temperature in the system.[Conclusion] The research could provide reference for promotion and application of the surface flow constructed wetland in North China.展开更多
The Tianjin coastal area is a typical soft soil region,where the soil is a marine deposit of the late Quaternary.The soil dynamic parameters from seismic risk assessment reports are collected,and drilling of 15 holes ...The Tianjin coastal area is a typical soft soil region,where the soil is a marine deposit of the late Quaternary.The soil dynamic parameters from seismic risk assessment reports are collected,and drilling of 15 holes was carried out to sample the soils and measure their dynamic characteristics.The data was divided into 7 types based on lithology,namely,muddy clay,muddy silty clay,silt,silty clay,clay,silty sand and fine sand.Statistics of the dynamic parameters of these soils are collected to obtain the mean values of dynamic shear modulus ratio and damping ratio at different depths.Then,two typical drill holes are selected to establish the soil dynamic models to investigate the seismic response in different cases.The dynamic seismic responses of soil are calculated using the statistical values of this paper,and the values of Code(1994) and those recommended by Yuan Xiaoming et al.(2000),respectively.The applicability and pertinence of the statistical value obtained in this paper are demonstrated by the response spectrum shape,peak ground acceleration and response spectral characteristics.The results can be taken as a reference of the soil dynamic value in this area and can be used in the seismic risk assessment of engineering projects.展开更多
Shear wave velocity is one of the important dynamic characteristics of soil layers and applied widely in aseismic engineering. In this paper, 500 drill logging data are used to make a linear interpolation based on 0.0...Shear wave velocity is one of the important dynamic characteristics of soil layers and applied widely in aseismic engineering. In this paper, 500 drill logging data are used to make a linear interpolation based on 0.01°×0.01°×1m grid. A shallow 3-D shear wave velocity structure of Tianjin coastal area is obtained. According to the data and geological background, we selected two typical velocity profiles to try to introduce and explain its relationship to basement structure. The results show that the shear wave velocity structure clearly presents the characteristic of stratification and lateral inhomogeneity. Furthermore, the difference of the shear wave structure between tectonic elements is clear and the velocity structure between the two sides of the local or border fault in the Quaternary is disturbed or affected significantly. It intuitively shows that the basement structure and fault activity of this region had good control of sedimentation development and strata formation in the Quaternary period which would have an important effect on engineering seismic and geological condition evaluation.展开更多
[Objective]The research aimed to analyze triggered mechanism of a hail weather in Tianjin on July 10,2011.[Method] Using Micaps data,automatic meteorological observation data,sounding data and Doppler radar data,a hai...[Objective]The research aimed to analyze triggered mechanism of a hail weather in Tianjin on July 10,2011.[Method] Using Micaps data,automatic meteorological observation data,sounding data and Doppler radar data,a hail process rarely happened in Daliutan Village,Yangliuqing Town,Xiqing District,Tianjin City on July 10,2011 was analyzed.Triggered mechanism of the hail weather was discussed.[Result]The hail weather was generated by super cell which was triggered by sea breeze front and ground convergence interaction.Upper situation was in front of the forward tilted trough at bottom rear of the cold vortex,which was favorable for development of the strong convective weather.On ground map,water vapor transportation existed in easterly airflow at bottom rear of the high-pressure.Meanwhile,convergence zone also existed.It was wet layer over 0 ℃ layer,and strong ascending motion existed,which was favorable for formation and development of the hail.Sea breeze front brought rich moisture,weak cold air and lifting effect when it moved toward inland from ocean,to make up for adverse conditions at low and middle layers.It could trigger a severely convective weather when moved to surface convergence zone.Doppler weather radar could monitor entire hail evolution process.[Conclusion]The research had obvious guidance significance for judging hail process.展开更多
Nowadays, Tianjin becomes a major economic development zone, emulating operations seen in Shenzhen and Shanghai. But the corresponding large-scale urban development is bringing great challenges to the existing modern ...Nowadays, Tianjin becomes a major economic development zone, emulating operations seen in Shenzhen and Shanghai. But the corresponding large-scale urban development is bringing great challenges to the existing modern architectural heritage, which is an indispensable part of Tianjin's history, character, and culture. The Wudadao Area in the previous British Concession is such a case. Through examining its development process, this research identif ies four modes of preservation strategies, and analyses the respective characteristics. Multiple stakeholders who take part in Wudadao's preservation and regeneration are recognized. Via case studies, the research elucidates the different roles played by responsible departments in Tianjin Municipal Government, state-owned enterprises, and local residents respectively. In a micro-circulation way, Wudadao has developed from an endangered colonial settlement to a re-recognized symbol of Tianjin's urban culture and a refurbished showcase of global identity.展开更多
Since its establishment about ten years ago, TEDA has taken advantage of eachopportune time created by China’s policy of opening wider and wider to the outsideworld and the rapid economic growth to deepen its reform ...Since its establishment about ten years ago, TEDA has taken advantage of eachopportune time created by China’s policy of opening wider and wider to the outsideworld and the rapid economic growth to deepen its reform and extend its exploitation,and thus has maintained a favorable momentum and an extraordinary high speed foreconomic development. With the total economic output of the whole area raised to展开更多
In order to construct a newly developed green area, the Tanggu urban area as the core part of Binhai new area,needs more and more clean energy year by year. This area is abound in geothermal resources endowed by the g...In order to construct a newly developed green area, the Tanggu urban area as the core part of Binhai new area,needs more and more clean energy year by year. This area is abound in geothermal resources endowed by the grand Nature.Based on the estimation of展开更多
Taking Shunping County of Hebei Province as an example,according to the relevant survey data in the year 2008 after returning cultivated land and data in the year 2001 before returning cultivated land, the thesis anal...Taking Shunping County of Hebei Province as an example,according to the relevant survey data in the year 2008 after returning cultivated land and data in the year 2001 before returning cultivated land, the thesis analyzes the impact of implementation of project of returning cultivated land to forests on local land use structure, three industrial added value and famers' per capita income. The results show that returning cultivated land has played a certain positive role on the local economic development and the improvement of people's life level.However, there are also some shortcomings: although famers' income is increasing with low growth rate, a large portion of famers still have not shaken off poverty; the farmers depends on subsidies greatly and the compensation mechanism of returning cultivated land is not considered well. China should further perfect the ecological compensation plan, and build rational ecological compensation mechanism in order to make the areas of returning cultivated land have self-blood-producing function; Shunping County should make full use of the location advantage in areas around Beijing-Tianjin, develop deep processing based on fruit trees industry, strengthen farmers' skill training, and increase input in the agricultural infrastructure construction to propel the sustainable development of agriculture.展开更多
Within the background of the need to promote the construction of ecological civilization and the current confl ict between the economic growth and the constraints of environment and resources, after a review of the th...Within the background of the need to promote the construction of ecological civilization and the current confl ict between the economic growth and the constraints of environment and resources, after a review of the theoretical study and practical exploration of ecological civilization, the article makes an analysis of the status quo of ecological civilization development in Beijing, Tianjin, and Hebei area, sums up the main problems there, and explores the development strategic framework to improve the regional ecological environment. It comes to the following conclusions: as the ecological and environmental problems in the BTH area are mainly the air pollution and so on, we should seek to build a mechanism of environmental management for sustainable development from the different aspects of industrial distribution, energy utilization, institution construction and market participation. We should capitalize on the chance to construct the ecological civilization, promote to change the regional economic growth pattern, improve the quality and effi ciency of development, and fi nally promote the synergetic development of ecological environment in the BTH area.展开更多
基金Sponsored by Natural Science Foundation of Tianjin City(11JCYBJC02800)Key Program of National Social Science Foundation of China(13&ZD162)
文摘Through investigating current sea use in coastal cities of China,and exploring foreign and domestic researches on sea use,this paper took Binhai New Area of Tianjin City for example to analyze major problems of its sea use in ecological security,planar form,land use layout,specialized planning,management and regulatory mechanism,then proposed strategies from 4 perspectives,namely ecological conservation and restoration,optimization of planning planar form,optimization of planning land use layout,and planning management,in order to provide references and instructions for the sea use planning of Chinese coastal cities.
文摘Compared with the stagnanteconomy of the rest world,Asian-Pa-cific economy has been experiencingthe hightest growth since the 1980s.Now,most researchers and officials,and even entrepreneurs believe
基金supported by the National Natural Science Foundation of China (40674016)Earthquake Research Fund of Ministry of Science and Technology of China ((2007)203/8-53)
文摘Taking Tianjin as an example,this paper proposed a methodology and process for evaluating near-fault strong ground motions from future earthquakes to mitigate earthquake damage for the metropolitan area and important engineering structures.The result of strong ground motion was predicted for Tianjin main faults by the hybrid method which mainly consists of 3D finite difference method and stochastic Green's function.Simulation is performed for 3D structures of Tianjin region and characterized asperity models.The characterized asperity model describing source heterogeneity is introduced following the fault information from the project of Tianjin Active Faults and Seismic Hazard Assessment.We simulated the worst case that two earthquakes separately occur.The results indicate that the fault position,rupture process and the sedimentary deposits of the basin significantly affect amplification of the simulated ground motion.Our results also demonstrate the possibility of practical simulating wave propagation including basin induced surface waves in broad frequency-band,for seismic hazard analysis near the fault from future earthquakes in urbanized areas.
基金Supported by the National Basic Research Program of China("973"Program2013CB035906)National Natural Science Foundation of China(No.51209159 and No.51439005)
文摘It is imperative to develop a risk assessment system for quickly predicting storm surge disaster due to the vulnerability of Tianjin Binhai New Area. The flood routing model with user-defined breaches was firstly established based on the seed spread algorithm in order to achieve a rapid forecasting of storm surge flood information. Furthermore, fuzzy mathematics was utilized to identify the storm disaster grade, and the hazard mapping was conducted to visually obtain the hazard spatial and temporal distribution. Finally, the flood routing visualization method was proposed based on numerical simulation of storm surge to achieve the reappearance scene of dynamic evolution process. The developed system can play a vital role in the management and decision-making of sea dyke mitigation engineering in Tianjin Binhai New Area.
基金National Nature Science Foundation of China(51608009)Support Plan for Construction of Highlevel Teacher Team in Colleges and Universities of Beijing in 2019+1 种基金Support Program for Top-notch Young Talents(CIT&TCD201904010)Fund of Beijing Research Center of Urban Governance(20XN237).
文摘With the development and changes of the times,many cities have to face the problem of renewal.However,in the context of globalization,urban renewal also makes urban cultural characteristics and regional characteristics inevitably missing.Therefore,we should pay attention to the protection and planning of regional historical and cultural heritages in the process of urban renewal,which plays an important role in the construction of urban characteristics and the shaping of city card.Xigu area of Tianjin also faces the problems of cultural loss and need for reconstruction,its function,layout,industrial structure and land use are adjusted and optimized in this article,with a view to showing the value of historical and cultural heritage and context of regional history.
基金Supported by Special Project of the Science Research in Public Service Industry,Ministry of Water Resources,China(2011-BH140002)
文摘[Objective] The research aimed to study winter operation process of the surface flow constructed wetland in Tianjin area.[Method] In view of climate characteristics in Tianjin,by the way of running under the ice,winter operation experiment of the surface flow constructed wetland in Tianjin was conducted,with the expectation to get some useful process parameters to run such systems in North China in winter.[Result] Although purification effect of the sewage by surface flow constructed wetland in winter was worse than that in other seasons(average reduction of about 20%),surface flow constructed wetland running under the ice was feasible in Tianjin area.When surface flow constructed wetland in North China ran under ice in winter,it was suggested that the outlet must be located in a low position to prevent to be completely frozen,and running water depth should not be less than 50-60 cm.The hydraulic load could be raised on the basis of reflux,and hydraulic retention time should maintain less than 4 d to keep water-soil interface not freezing.Inlet water depth should be increased as much as possible to improve temperature in the system.[Conclusion] The research could provide reference for promotion and application of the surface flow constructed wetland in North China.
基金sponsored by the State-level Public Welfare Scientific Research Courtyard Basic Scientific Research ProgramInstitute of Crustal Dynamics+1 种基金CEA (ZDJ2009-07ZDJ2009-23)
文摘The Tianjin coastal area is a typical soft soil region,where the soil is a marine deposit of the late Quaternary.The soil dynamic parameters from seismic risk assessment reports are collected,and drilling of 15 holes was carried out to sample the soils and measure their dynamic characteristics.The data was divided into 7 types based on lithology,namely,muddy clay,muddy silty clay,silt,silty clay,clay,silty sand and fine sand.Statistics of the dynamic parameters of these soils are collected to obtain the mean values of dynamic shear modulus ratio and damping ratio at different depths.Then,two typical drill holes are selected to establish the soil dynamic models to investigate the seismic response in different cases.The dynamic seismic responses of soil are calculated using the statistical values of this paper,and the values of Code(1994) and those recommended by Yuan Xiaoming et al.(2000),respectively.The applicability and pertinence of the statistical value obtained in this paper are demonstrated by the response spectrum shape,peak ground acceleration and response spectral characteristics.The results can be taken as a reference of the soil dynamic value in this area and can be used in the seismic risk assessment of engineering projects.
基金jointly sponsored by the Special Program of Science and Technology Innovation of Tianjin Municipality ( 07FDZDSF02102 )the Geological Program of Mineral Resources Compensation of Tianjin Municipality,China
文摘Shear wave velocity is one of the important dynamic characteristics of soil layers and applied widely in aseismic engineering. In this paper, 500 drill logging data are used to make a linear interpolation based on 0.01°×0.01°×1m grid. A shallow 3-D shear wave velocity structure of Tianjin coastal area is obtained. According to the data and geological background, we selected two typical velocity profiles to try to introduce and explain its relationship to basement structure. The results show that the shear wave velocity structure clearly presents the characteristic of stratification and lateral inhomogeneity. Furthermore, the difference of the shear wave structure between tectonic elements is clear and the velocity structure between the two sides of the local or border fault in the Quaternary is disturbed or affected significantly. It intuitively shows that the basement structure and fault activity of this region had good control of sedimentation development and strata formation in the Quaternary period which would have an important effect on engineering seismic and geological condition evaluation.
基金Supported by Open Item of the Cloud and Mist Physical Laboratory,China Meteorological Administration (2009Z00310)Science and Technology Plan Item in Hebei Province (12237126D)Open Science and Research Item of the Cloud and Mist Physical Environmental Key Open Laboratory,China Meteorological Administration(2009004) .
文摘[Objective]The research aimed to analyze triggered mechanism of a hail weather in Tianjin on July 10,2011.[Method] Using Micaps data,automatic meteorological observation data,sounding data and Doppler radar data,a hail process rarely happened in Daliutan Village,Yangliuqing Town,Xiqing District,Tianjin City on July 10,2011 was analyzed.Triggered mechanism of the hail weather was discussed.[Result]The hail weather was generated by super cell which was triggered by sea breeze front and ground convergence interaction.Upper situation was in front of the forward tilted trough at bottom rear of the cold vortex,which was favorable for development of the strong convective weather.On ground map,water vapor transportation existed in easterly airflow at bottom rear of the high-pressure.Meanwhile,convergence zone also existed.It was wet layer over 0 ℃ layer,and strong ascending motion existed,which was favorable for formation and development of the hail.Sea breeze front brought rich moisture,weak cold air and lifting effect when it moved toward inland from ocean,to make up for adverse conditions at low and middle layers.It could trigger a severely convective weather when moved to surface convergence zone.Doppler weather radar could monitor entire hail evolution process.[Conclusion]The research had obvious guidance significance for judging hail process.
基金Supported by National Natural Science Foundation No.51478299&51108307
文摘Nowadays, Tianjin becomes a major economic development zone, emulating operations seen in Shenzhen and Shanghai. But the corresponding large-scale urban development is bringing great challenges to the existing modern architectural heritage, which is an indispensable part of Tianjin's history, character, and culture. The Wudadao Area in the previous British Concession is such a case. Through examining its development process, this research identif ies four modes of preservation strategies, and analyses the respective characteristics. Multiple stakeholders who take part in Wudadao's preservation and regeneration are recognized. Via case studies, the research elucidates the different roles played by responsible departments in Tianjin Municipal Government, state-owned enterprises, and local residents respectively. In a micro-circulation way, Wudadao has developed from an endangered colonial settlement to a re-recognized symbol of Tianjin's urban culture and a refurbished showcase of global identity.
基金The Young Scientist Fund of National Natural Science Foundation of China, No.40901224 National Basic Research Program of China, No.2010CB950900+1 种基金 Open Fund of State Key Laboratory of Remote Sensing Science, No.2009KFJJ005 Open Fund of State Key Lab of Resources and Environmental Information System, No.A0725
文摘在地区性的规模的不可渗透的表面区域(ISA ) 是为在都市化和全球环境变化的相互作用下面检验陆地使用 / 盖住变化(LUCC ) 生态系统过程气候变化的相互作用和机制的重要环境因素之一。从在地区性的规模的遥远地察觉到的数据的 ISA 的及时、精确的抽取是挑战性的。这研究基于 MODIS 和 DMSP-OLS 数据和瓷器陆地使用 / 盖住数据的加入探索了 ISA 抽取。在在 250 m 的一个空间决定的在 2000 和 2008 的 Beijing-Tianjin-Tangshan 大城市的区域(BTTMA ) 的 ISA 数据集被开发,他们的空间与时间的变化被分析,并且他们水质量上的影响然后被评估。结果显示在 BTTMA 的 ISA 从 2000 ~ 2008 在紧张和程度两个都沿着城市的穗,交通走廊和沿海的带很快增加了。在 Hebei 省的三个城市(Tangshan, Langfang 和 Qinhuangdao ) 有生长在导致逐渐地把工业转移到附近的区域的城市里由于 population-resources-environments 的压力比北京评估的更高的 ISA。在 BTTMA 的稠密的 ISA 分发在 Haihe 河分水岭在水质量上有严肃的影响。同时,在亚分水岭的 ISA 的比例与河货到付款和 NH3-N 的密度有显著地线性的关系。
文摘Since its establishment about ten years ago, TEDA has taken advantage of eachopportune time created by China’s policy of opening wider and wider to the outsideworld and the rapid economic growth to deepen its reform and extend its exploitation,and thus has maintained a favorable momentum and an extraordinary high speed foreconomic development. With the total economic output of the whole area raised to
文摘In order to construct a newly developed green area, the Tanggu urban area as the core part of Binhai new area,needs more and more clean energy year by year. This area is abound in geothermal resources endowed by the grand Nature.Based on the estimation of
基金Supported by the State Social Science Fund Program(09CSH014)
文摘Taking Shunping County of Hebei Province as an example,according to the relevant survey data in the year 2008 after returning cultivated land and data in the year 2001 before returning cultivated land, the thesis analyzes the impact of implementation of project of returning cultivated land to forests on local land use structure, three industrial added value and famers' per capita income. The results show that returning cultivated land has played a certain positive role on the local economic development and the improvement of people's life level.However, there are also some shortcomings: although famers' income is increasing with low growth rate, a large portion of famers still have not shaken off poverty; the farmers depends on subsidies greatly and the compensation mechanism of returning cultivated land is not considered well. China should further perfect the ecological compensation plan, and build rational ecological compensation mechanism in order to make the areas of returning cultivated land have self-blood-producing function; Shunping County should make full use of the location advantage in areas around Beijing-Tianjin, develop deep processing based on fruit trees industry, strengthen farmers' skill training, and increase input in the agricultural infrastructure construction to propel the sustainable development of agriculture.
基金supported by Social Science Foundation of Hebei Province (Grant No. HB15YJ118)Research on the social science development of the social science community of Hebei Province (Grant No. 2015040225)Scientific research foundation of Northeastern University at Qinhuangdao,2016 (Grant No. XNR201602)
文摘Within the background of the need to promote the construction of ecological civilization and the current confl ict between the economic growth and the constraints of environment and resources, after a review of the theoretical study and practical exploration of ecological civilization, the article makes an analysis of the status quo of ecological civilization development in Beijing, Tianjin, and Hebei area, sums up the main problems there, and explores the development strategic framework to improve the regional ecological environment. It comes to the following conclusions: as the ecological and environmental problems in the BTH area are mainly the air pollution and so on, we should seek to build a mechanism of environmental management for sustainable development from the different aspects of industrial distribution, energy utilization, institution construction and market participation. We should capitalize on the chance to construct the ecological civilization, promote to change the regional economic growth pattern, improve the quality and effi ciency of development, and fi nally promote the synergetic development of ecological environment in the BTH area.