The Northeast Pacific coastal ocean, as a typical river-influenced coastal upwelling system, is characterized by significant variability of sea surface partial pressure of carbon dioxide (</span><i><spa...The Northeast Pacific coastal ocean, as a typical river-influenced coastal upwelling system, is characterized by significant variability of sea surface partial pressure of carbon dioxide (</span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;">, <200 to >1000</span></span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">μ</span><span><span style="font-family:Verdana;">atm). This study reviewed the </span><a name="_Hlk76571454"></a><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> variability and its underlying controlling mechanism in this highly dynamic region by bringing together previous scientific findings and historical data. The large </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> variability reflects the complex interactions between physical processes (riverine input and coastal upwelling) and the biological </span><span style="font-family:Verdana;">responses to the nutrient transportation associated with these physical</span><span style="font-family:Verdana;"> processes, while temperature and air-sea gas exchange play a minor role in affecting </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;">. Both the river water and upwelled subsurface water are characterized by higher concentrations of </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> and nutrients when compared to the coastal surface water. The presence of high chlorophyll-a and low </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> in river plumes and areas adjacent to upwelling locations showed the intense biological CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> uptake. The influences of riverine input and coastal upwelling thus mainly depend on the competing effect of high background </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> of river water and upwelled subsurface water vs. the biological dropdown of </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> resulting from the riverine- and upwelling-associated nutrient supplies. The strength of upwelling-favorable wind plays an important role in the </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> variability by affecting the intensity of coastal upwelling, with stronger wind speed causing more intense upwelling. The long-term </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> increasing rate in the Northeast Pacific coast is observed to be lower than that in the North Pacific open ocean.展开更多
The CSIR Water Research Institute undertook water quality monitoring and assessment of the Southwestern and the Coastal Rivers Systems of Ghana from 2005 to 2008 for the Water Resources Commission of Ghana (WRC) under...The CSIR Water Research Institute undertook water quality monitoring and assessment of the Southwestern and the Coastal Rivers Systems of Ghana from 2005 to 2008 for the Water Resources Commission of Ghana (WRC) under WRIS II Project, a Danish Government Funded Project. The Southwestern and the Coastal Rivers Systems cover approximately 30% of the total drainage basins of Ghana. A total of 19 surface water stations were selected for the monitoring programme. The Adapted Water Quality Index (WQI) was to be used as a tool to classify the overall ambient water quality at the 19 different stations. The index classified water quality into one of four categories: good (Class I, >80), fairly good (Class II, 50 - 80), poor (Class III, 25 - 50), and grossly polluted (Class IV, <25). This paper presents the Water Quality Index approach to the assessment of water quality of the waters in the different stations during the period of study. These ten water quality parameters were used to determine the water quality index (WQI): Dissolved Oxygen (DO % Saturation), Biochemical Oxygen Demand (BOD), Ammonium Nitrogen (NH4-N), Faecal Coliform (FC), pH, Nitrate as Nitrogen (NO3-N), Phosphate as Phosphorus (PO4-P), Total Suspended Solids (TSS), Conductivity and Temperature. Evaluation of the waters with the WQI indicated that most Ghanaian waters are currently in Class II, the fairly good water quality state, but with variations in this range within the seasons and stations, and from one water body to the other. Potroase in the Densu basin had the best water quality during the study period while Nsawam had the poorest. Efforts should be made to prevent further pollution of the waters to improve their quality.展开更多
Based on dynamic theory of system, agriculture is a complex system composed by element, structure, function and development. Firstly, this paper analyzes their connotation and relationship, which could be simply descr...Based on dynamic theory of system, agriculture is a complex system composed by element, structure, function and development. Firstly, this paper analyzes their connotation and relationship, which could be simply described that in virtue of element integrating and structure optimizing, agricultural system may achieve multifunctionality to meet increasingly diverse demands. As a case study of Suzhou, it concludes that Suzhou has a LP-dependence on agricultural element, and the growth extent of agricultural productivity correlates to the ratio of agricultural labor reduc- ing rate to farmland reducing rate. Agricultural structure of Suzhou changed with time, and in the early 1980s and 2000s it was most notable. Correspondingly, agricultural function has experienced a succession process: 'production', 'production-living', and 'production-living-ecology'. At last, based on questionnaires and interviews, some new characteristics and problems of agricultural development in coastal developed region of China have been put forward. Meanwhile, some typical patterns of modern agriculture in Suzhou which adapt to system evolving are also brought up such as export-oriented agriculture, enterprises-leading agriculture, agricultural science and technology parks, characteristic and stereoscopic agriculture, tourism and sightseeing agriculture.展开更多
Adaptability theory is an important tool to analyze the degree, mechanism and process of interaction between human and environment, which provides a new perspective for the research of sustainability assessment. Based...Adaptability theory is an important tool to analyze the degree, mechanism and process of interaction between human and environment, which provides a new perspective for the research of sustainability assessment. Based on the entropy weight-TOPSIS method and the panel Tobit model from the perspective of adaptability, spatio-temporal difference and influencing factors of environmental adaptability assessment of human-sea economic system in Liaoning coastal area was measured by using the city panel data from 2000 to 2014. The results indicate that: 1) The environmental adaptability of human-sea economic system in Liaoning coastal area rose slowly from 2000 to 2014, the developing trend of each city was linearly related, and Dalian was in a leading position. 2) The different adaptability elements and adaptability subsystem show polarization phenomenon and completely different regional evolution characteristics. The adaptability of human-sea environment system and human-sea economic system rose slowly and had the characteristics of linear relationship, and the adaptability of human-sea environment system is the main reason for the difference of environmental adaptability of human-sea economic system. 3) Science and technology, environmental management, marine economic development level, port construction are the driving factors of the healthy development of environmental adaptability of urban human-sea economic system.展开更多
To meet the increasing demand of national spatial database infrastructure construction and application, a concept model of China's coastal zone scientific data platform is established based on the information feat...To meet the increasing demand of national spatial database infrastructure construction and application, a concept model of China's coastal zone scientific data platform is established based on the information feature analysis of a compound dataset, consisting of remote sensing data and conventional data. Based on this concept model, the detailed logical database structure and the storage strategy of remote sensing data and their metadata using ArcSDE are designed. The complicated technology of multisources data combination in this research is crucial to the future coastal zone and offshore database construction and practical running, which will provide intelligent information analysis and technological service for coastal zone and offshore investigation, research, development and management.展开更多
In the purpose of defining typical urban water management challenges in coastal lowlands in the context of global climate change, a comparative study was conducted between two coastal new towns respectively located in...In the purpose of defining typical urban water management challenges in coastal lowlands in the context of global climate change, a comparative study was conducted between two coastal new towns respectively located in the Netherlands and Northern China. Comparative method is applied to define main functioning patterns of urban water systems in the two cases, then computer simulations were used to furthercompare drainage capacity in order to reveal the trends of urban water management. Major resulthas shown that Almere in the Netherlands generally more advanced in urban water management asmultiple functioning patterns are available.Strong dykes maintain competence for land subsidence and sea level rise. Open water system decreases local runoff and increaseswater retention level. Systematic control ofsluicesand locks which serve for shipping and waterfront landscaping are simultaneously isolating contaminants from outer water body. Tianjin Eco-city in China has shown both strengths and weaknesses. It takes large amount of reclaimed water as main landscaping water source, which adapts to local water pollution and shortage while requires highly centralized facilities. Large water body is reserved and huge scale underground drainage system built, but it is still vulnerable to heavy storms due to the lack of efficient surface water drainage system. Coastal line control does not adequately prevent from increasing storm surge risks in the future. SWMMsimulations have supported the viewpoint ofdistributed surface water with a higher efficiency for storm drainage. Meanwhile, surface water system returns more added values to urban development. The study is corresponding well with the theory of water sensitive city. As a conclusion, urban water system should always incorporate methods to achieve higher system resilience based on multiple functioning patterns.展开更多
The coastal zone and offshore are clearly of major economic and social importance, in thesame time it causes a series of problems of resources and ecosystem too. The research on and development of integrated applicati...The coastal zone and offshore are clearly of major economic and social importance, in thesame time it causes a series of problems of resources and ecosystem too. The research on and development of integrated application techniques for remote sensing provide not only a microcosmic and dynamic and synchronous technical means to the monitor, but also an integrated technical scheme to harmonically solve the ecological environment problem. The system is designed to focus on the application techniques of multi-sources remote sensing data. By developing remote sensing information extraction module, integrated user platform, and application module objected to the real ocean procedure for China' s coastal zone and offshore, the information system consists of the management of prodigious amount of data, display, analysis, simulation and output will be constructed and implemented. The final objective is to transform the research on ocean remote sensing into application.展开更多
With the aim of the harmonious development of economy-environment system in coastal cities in China, an index system used to evaluate the economy-environment system is built up in this paper, which includes four aspec...With the aim of the harmonious development of economy-environment system in coastal cities in China, an index system used to evaluate the economy-environment system is built up in this paper, which includes four aspects: economy, environment, resources, and ocean industry. Based on the analysis on present condition and future trends of economic development in Tianjin and the quantification of various evaluation indices, the author applies integrated index valuation model to valuate the harmonious development of economy-environment of Tianjin. The results show that the coordinated degree of economy-environment would drop down in the future, from 0.95(superior level of harmonious development) in 2000 to 0.59(inferior level of harmonious development) in 2015, under the circumstance of the current economic development mode. The level of comprehensive development of Tianjin also presents to descend. Based on the analyzing of status and future trends of environment-economy coordinated development, the paper puts forward the countermea- sures such as industry structure adjustment, increasing the level of environmental protection investment, strengthening the enforcement of environmental policies to improve the coordinated development of environment-economy in Tianjin municipality.展开更多
Atmospheric dynamics and climatology in West Africa are strongly dominated by the latitudinal migration of the ITCZ which imposes directly or indirectly determinism on coastal ecosystems. Thus, the Grand-Lahou lagoon ...Atmospheric dynamics and climatology in West Africa are strongly dominated by the latitudinal migration of the ITCZ which imposes directly or indirectly determinism on coastal ecosystems. Thus, the Grand-Lahou lagoon system and its watershed are influenced by the ITCZ, whose seasonal study made it possible to understand its mode of action first on climatic factors, then hydroclimatic, and finally hydrological in the context of global changes. The study of these factors showed a differentiated impact of its migration on the hydrological regime defining a new configuration of the lagoon system and beyond;the coastal ecosystems of the northern coast of the Gulf of Guinea irrigated by numerous fluvial inputs. Salinity, a hydrological parameter of critical ecosystem importance, combined with transparency and depth, has enabled the spatio-temporal description of hydrology. To do this, a series of monthly measurements (in-situ) for spatial coverage of 25 stations was tested. Long before that, the climatic and hydroclimatic parameters were obtained respectively at SODEXAM, the meteorological site earth.nullschool.net and ONADE. This study brought together the dynamics of the ITCZ and the hydrological system of the lagoon.展开更多
The utilization of sequence stratigraphic concepts in identifying sands and their spatial continuity in distinct gross depositional settings is key,especially in frontier settings where data paucity is a common challe...The utilization of sequence stratigraphic concepts in identifying sands and their spatial continuity in distinct gross depositional settings is key,especially in frontier settings where data paucity is a common challenge.In the Baka field,onshore Niger Delta,detailed reservoir correlation guided by sequence stratigraphic framework analysis showed the distribution of sand and shale units constituting reservoirseal pairs(RSP)correlatable across the field.Within the 3rd-order packages,it is observed that the lowstand systems tract(LST)and highstand systems tract(HST)contain more RSPs and thicker 4th-and 5th-order sands than the transgressive systems tract(TST).In terms of bathymetry,it is noted that irrespective of systems tracts,the RSP Index(RI)decreases from the proximal shallow/inner shelf settings to the more distal outer shelf areas.Amongst all three systems tracts,intervals interpreted as lowstand prograding complexes contain the best developed sands and highest RSP.Sand development within the LSTs has been controlled by a pronounced growth fault regime accompanied by high subsidence and sedimentation rates.This is linked to the basinward migration of the sands during prolonged sea-level fall,creating significant accommodation space for sand deposition.On the other hand,the TSTs known to mark periods of progressive sea-level rise and landward migration of sandy facies,show thinner sands enclosed in much thicker,laterally extensive,and better-preserved deeper marine shales.Interpreted seismic sections indicate intense growth faulting and channelization that influenced the syn-and postdepositional development of the sand packages across the field.The initial timing of deformation of subregional faults in this area coincides with periods of abrupt falls in sea level.This approach could be useful for predicting sand-prone areas in frontier fields as well as possible reservoir-seal parameters required for some aspects of petroleum system analysis and quick-look volume estimation.展开更多
文摘The Northeast Pacific coastal ocean, as a typical river-influenced coastal upwelling system, is characterized by significant variability of sea surface partial pressure of carbon dioxide (</span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;">, <200 to >1000</span></span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">μ</span><span><span style="font-family:Verdana;">atm). This study reviewed the </span><a name="_Hlk76571454"></a><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> variability and its underlying controlling mechanism in this highly dynamic region by bringing together previous scientific findings and historical data. The large </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> variability reflects the complex interactions between physical processes (riverine input and coastal upwelling) and the biological </span><span style="font-family:Verdana;">responses to the nutrient transportation associated with these physical</span><span style="font-family:Verdana;"> processes, while temperature and air-sea gas exchange play a minor role in affecting </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;">. Both the river water and upwelled subsurface water are characterized by higher concentrations of </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> and nutrients when compared to the coastal surface water. The presence of high chlorophyll-a and low </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> in river plumes and areas adjacent to upwelling locations showed the intense biological CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> uptake. The influences of riverine input and coastal upwelling thus mainly depend on the competing effect of high background </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> of river water and upwelled subsurface water vs. the biological dropdown of </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> resulting from the riverine- and upwelling-associated nutrient supplies. The strength of upwelling-favorable wind plays an important role in the </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> variability by affecting the intensity of coastal upwelling, with stronger wind speed causing more intense upwelling. The long-term </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> increasing rate in the Northeast Pacific coast is observed to be lower than that in the North Pacific open ocean.
文摘The CSIR Water Research Institute undertook water quality monitoring and assessment of the Southwestern and the Coastal Rivers Systems of Ghana from 2005 to 2008 for the Water Resources Commission of Ghana (WRC) under WRIS II Project, a Danish Government Funded Project. The Southwestern and the Coastal Rivers Systems cover approximately 30% of the total drainage basins of Ghana. A total of 19 surface water stations were selected for the monitoring programme. The Adapted Water Quality Index (WQI) was to be used as a tool to classify the overall ambient water quality at the 19 different stations. The index classified water quality into one of four categories: good (Class I, >80), fairly good (Class II, 50 - 80), poor (Class III, 25 - 50), and grossly polluted (Class IV, <25). This paper presents the Water Quality Index approach to the assessment of water quality of the waters in the different stations during the period of study. These ten water quality parameters were used to determine the water quality index (WQI): Dissolved Oxygen (DO % Saturation), Biochemical Oxygen Demand (BOD), Ammonium Nitrogen (NH4-N), Faecal Coliform (FC), pH, Nitrate as Nitrogen (NO3-N), Phosphate as Phosphorus (PO4-P), Total Suspended Solids (TSS), Conductivity and Temperature. Evaluation of the waters with the WQI indicated that most Ghanaian waters are currently in Class II, the fairly good water quality state, but with variations in this range within the seasons and stations, and from one water body to the other. Potroase in the Densu basin had the best water quality during the study period while Nsawam had the poorest. Efforts should be made to prevent further pollution of the waters to improve their quality.
基金Under the auspices of National Natural Science Foundation of China (No. 40635029, No. 40771014)
文摘Based on dynamic theory of system, agriculture is a complex system composed by element, structure, function and development. Firstly, this paper analyzes their connotation and relationship, which could be simply described that in virtue of element integrating and structure optimizing, agricultural system may achieve multifunctionality to meet increasingly diverse demands. As a case study of Suzhou, it concludes that Suzhou has a LP-dependence on agricultural element, and the growth extent of agricultural productivity correlates to the ratio of agricultural labor reduc- ing rate to farmland reducing rate. Agricultural structure of Suzhou changed with time, and in the early 1980s and 2000s it was most notable. Correspondingly, agricultural function has experienced a succession process: 'production', 'production-living', and 'production-living-ecology'. At last, based on questionnaires and interviews, some new characteristics and problems of agricultural development in coastal developed region of China have been put forward. Meanwhile, some typical patterns of modern agriculture in Suzhou which adapt to system evolving are also brought up such as export-oriented agriculture, enterprises-leading agriculture, agricultural science and technology parks, characteristic and stereoscopic agriculture, tourism and sightseeing agriculture.
基金Under the auspices of Natural Science Youth Foundation of China(No.41201114)the MOE Project of Key Research Institute of Humanities and Social Sciences in University(No.16JJD790021)+1 种基金Educational Commission of Liaoning Province of China(No.JZ201783604)2018 Social Science Alliance Project of Liaoning Province of China(No.2018lslktjd-015)
文摘Adaptability theory is an important tool to analyze the degree, mechanism and process of interaction between human and environment, which provides a new perspective for the research of sustainability assessment. Based on the entropy weight-TOPSIS method and the panel Tobit model from the perspective of adaptability, spatio-temporal difference and influencing factors of environmental adaptability assessment of human-sea economic system in Liaoning coastal area was measured by using the city panel data from 2000 to 2014. The results indicate that: 1) The environmental adaptability of human-sea economic system in Liaoning coastal area rose slowly from 2000 to 2014, the developing trend of each city was linearly related, and Dalian was in a leading position. 2) The different adaptability elements and adaptability subsystem show polarization phenomenon and completely different regional evolution characteristics. The adaptability of human-sea environment system and human-sea economic system rose slowly and had the characteristics of linear relationship, and the adaptability of human-sea environment system is the main reason for the difference of environmental adaptability of human-sea economic system. 3) Science and technology, environmental management, marine economic development level, port construction are the driving factors of the healthy development of environmental adaptability of urban human-sea economic system.
基金the“863”Marine Monitor of Hitech Research and Development Program of China under contract No.,5 2003AA604040 a, 2002AA639640.
文摘To meet the increasing demand of national spatial database infrastructure construction and application, a concept model of China's coastal zone scientific data platform is established based on the information feature analysis of a compound dataset, consisting of remote sensing data and conventional data. Based on this concept model, the detailed logical database structure and the storage strategy of remote sensing data and their metadata using ArcSDE are designed. The complicated technology of multisources data combination in this research is crucial to the future coastal zone and offshore database construction and practical running, which will provide intelligent information analysis and technological service for coastal zone and offshore investigation, research, development and management.
文摘In the purpose of defining typical urban water management challenges in coastal lowlands in the context of global climate change, a comparative study was conducted between two coastal new towns respectively located in the Netherlands and Northern China. Comparative method is applied to define main functioning patterns of urban water systems in the two cases, then computer simulations were used to furthercompare drainage capacity in order to reveal the trends of urban water management. Major resulthas shown that Almere in the Netherlands generally more advanced in urban water management asmultiple functioning patterns are available.Strong dykes maintain competence for land subsidence and sea level rise. Open water system decreases local runoff and increaseswater retention level. Systematic control ofsluicesand locks which serve for shipping and waterfront landscaping are simultaneously isolating contaminants from outer water body. Tianjin Eco-city in China has shown both strengths and weaknesses. It takes large amount of reclaimed water as main landscaping water source, which adapts to local water pollution and shortage while requires highly centralized facilities. Large water body is reserved and huge scale underground drainage system built, but it is still vulnerable to heavy storms due to the lack of efficient surface water drainage system. Coastal line control does not adequately prevent from increasing storm surge risks in the future. SWMMsimulations have supported the viewpoint ofdistributed surface water with a higher efficiency for storm drainage. Meanwhile, surface water system returns more added values to urban development. The study is corresponding well with the theory of water sensitive city. As a conclusion, urban water system should always incorporate methods to achieve higher system resilience based on multiple functioning patterns.
基金This study was supported by Project 2001AA633010 from "863"Marine Monitor of Hi-Tech Research and Develop-ment Program of China.
文摘The coastal zone and offshore are clearly of major economic and social importance, in thesame time it causes a series of problems of resources and ecosystem too. The research on and development of integrated application techniques for remote sensing provide not only a microcosmic and dynamic and synchronous technical means to the monitor, but also an integrated technical scheme to harmonically solve the ecological environment problem. The system is designed to focus on the application techniques of multi-sources remote sensing data. By developing remote sensing information extraction module, integrated user platform, and application module objected to the real ocean procedure for China' s coastal zone and offshore, the information system consists of the management of prodigious amount of data, display, analysis, simulation and output will be constructed and implemented. The final objective is to transform the research on ocean remote sensing into application.
文摘With the aim of the harmonious development of economy-environment system in coastal cities in China, an index system used to evaluate the economy-environment system is built up in this paper, which includes four aspects: economy, environment, resources, and ocean industry. Based on the analysis on present condition and future trends of economic development in Tianjin and the quantification of various evaluation indices, the author applies integrated index valuation model to valuate the harmonious development of economy-environment of Tianjin. The results show that the coordinated degree of economy-environment would drop down in the future, from 0.95(superior level of harmonious development) in 2000 to 0.59(inferior level of harmonious development) in 2015, under the circumstance of the current economic development mode. The level of comprehensive development of Tianjin also presents to descend. Based on the analyzing of status and future trends of environment-economy coordinated development, the paper puts forward the countermea- sures such as industry structure adjustment, increasing the level of environmental protection investment, strengthening the enforcement of environmental policies to improve the coordinated development of environment-economy in Tianjin municipality.
文摘Atmospheric dynamics and climatology in West Africa are strongly dominated by the latitudinal migration of the ITCZ which imposes directly or indirectly determinism on coastal ecosystems. Thus, the Grand-Lahou lagoon system and its watershed are influenced by the ITCZ, whose seasonal study made it possible to understand its mode of action first on climatic factors, then hydroclimatic, and finally hydrological in the context of global changes. The study of these factors showed a differentiated impact of its migration on the hydrological regime defining a new configuration of the lagoon system and beyond;the coastal ecosystems of the northern coast of the Gulf of Guinea irrigated by numerous fluvial inputs. Salinity, a hydrological parameter of critical ecosystem importance, combined with transparency and depth, has enabled the spatio-temporal description of hydrology. To do this, a series of monthly measurements (in-situ) for spatial coverage of 25 stations was tested. Long before that, the climatic and hydroclimatic parameters were obtained respectively at SODEXAM, the meteorological site earth.nullschool.net and ONADE. This study brought together the dynamics of the ITCZ and the hydrological system of the lagoon.
基金sponsored by the Shell Petroleum Development Company of Nigeria Limited(SPDC).
文摘The utilization of sequence stratigraphic concepts in identifying sands and their spatial continuity in distinct gross depositional settings is key,especially in frontier settings where data paucity is a common challenge.In the Baka field,onshore Niger Delta,detailed reservoir correlation guided by sequence stratigraphic framework analysis showed the distribution of sand and shale units constituting reservoirseal pairs(RSP)correlatable across the field.Within the 3rd-order packages,it is observed that the lowstand systems tract(LST)and highstand systems tract(HST)contain more RSPs and thicker 4th-and 5th-order sands than the transgressive systems tract(TST).In terms of bathymetry,it is noted that irrespective of systems tracts,the RSP Index(RI)decreases from the proximal shallow/inner shelf settings to the more distal outer shelf areas.Amongst all three systems tracts,intervals interpreted as lowstand prograding complexes contain the best developed sands and highest RSP.Sand development within the LSTs has been controlled by a pronounced growth fault regime accompanied by high subsidence and sedimentation rates.This is linked to the basinward migration of the sands during prolonged sea-level fall,creating significant accommodation space for sand deposition.On the other hand,the TSTs known to mark periods of progressive sea-level rise and landward migration of sandy facies,show thinner sands enclosed in much thicker,laterally extensive,and better-preserved deeper marine shales.Interpreted seismic sections indicate intense growth faulting and channelization that influenced the syn-and postdepositional development of the sand packages across the field.The initial timing of deformation of subregional faults in this area coincides with periods of abrupt falls in sea level.This approach could be useful for predicting sand-prone areas in frontier fields as well as possible reservoir-seal parameters required for some aspects of petroleum system analysis and quick-look volume estimation.