To evaluate the status and changes of macrobenthic communities related to the construction of the Longkou Artificial Island(LAI)in the Bohai Sea,China,four annual surveys were conducted from 2010 to 2013.Significant c...To evaluate the status and changes of macrobenthic communities related to the construction of the Longkou Artificial Island(LAI)in the Bohai Sea,China,four annual surveys were conducted from 2010 to 2013.Significant changes on environmental variations and macrobenthic communities were observed in 2013 after the LAI construction a couple of years later.The changing environment was primarily presented by lower values of pH,dissolved oxygen(DO),organic material(OM)percentage,and higher salinity,suspended particulate matter(SPM)concentration and oil concentration.The main dominant species shifted from Polychaeta taxa in 2010 to Mollusca taxa in 2013 due to the changes of environmental variables.An apparent miniaturization tendency in body size of macrobenthic species was presented from 2010 to 2013.The biodiversity indices increased yearly from 2010 to 2013.However,inter-site homogenization was observed in both the community structure and health status.Multivariate AZTI Marine Biotic Index(M-AMBI)analysis showed that the health status of stations changed depending on its original status and distance to the LAI.However,no significant differences were found in the spatial distribution of either environmental variables or abundance,biomass and biodiversity of macrobenthic communities.All the results will provide a basis for the long-term ecological assessment of reclamation.展开更多
Longkou City is a coastal area,and lacks water resources.The overexploitation of groundwater causes seawater intrusion.At present,seawater intrudes an area of 68 km2.With the decrease of groundwater extraction,the sea...Longkou City is a coastal area,and lacks water resources.The overexploitation of groundwater causes seawater intrusion.At present,seawater intrudes an area of 68 km2.With the decrease of groundwater extraction,the seawater intrusion area has generally declined.The paper expounds the development process of seawater intrusion as well as the corresponding prevention and control measures of using groundwater replenishment and groundwater throttling in Longkou City.In view of the seawater intrusion problem in Longkou City,some adaptive management countermeasures are put forward,which include:Adjusting industrial and agricultural structure,promoting economic and social development to match water resources;improving water usage structure,optimizing the utilization of water resources;advancing the construction of a water-saving society,using water resources efficiently;implementing inter-basin water transfer,using water resources rationally;developing and utilizing unconventional water sources,making full use of water resources;strengthening water infrastructure construction,increasing the development and utilization potential of water resources;carrying out ecological restoration,protecting water resources and ecological environment;improving the management informationalization level,strengthening the capabilities of groundwater monitoring and management;increasing publicity,improving public awareness of participation.展开更多
The coastal region of Longkou town in Shandong province belongs to one of severe disaster areas of seawater incursion in China. It is caused by continuously withdrawal of groundwater. The distribution of seawater incu...The coastal region of Longkou town in Shandong province belongs to one of severe disaster areas of seawater incursion in China. It is caused by continuously withdrawal of groundwater. The distribution of seawater incursion areas shows a consistence with that of the groundwater zone of negative table values, and both of them indicate an identical extending trend. Based on monitored data of groundwater withdrawal and seawater incursion, the relation between excessive withdrawal of groundwater and seawater incursion is analyzed by regression method. The results show that volume of excessive withdrawal of groundwater is closely related with values of the seawater incursion area. The measures and suggestions for controlling seawater incursion are also put forward.展开更多
The extensive intrusion （covering an area of 83.7-238.3 km;and accounting for 18.6-31.5% of the total area of the plain）, the presence of a transitional zone 1.5-6.0 km in width, and the interconnection in distribut...The extensive intrusion （covering an area of 83.7-238.3 km;and accounting for 18.6-31.5% of the total area of the plain）, the presence of a transitional zone 1.5-6.0 km in width, and the interconnection in distribution between the seawater intrusion district and the region lower than the sea level caused by the strong drop of the groundwater level are major characteristics of the seawater intrusion in the study area. Cation exchange played an important role during the formation of chemical composition of the groundwater in the seawater intrusion district.展开更多
基金Supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Nos.XDA23050304,XDA23050202)the Key Research Project of Frontier Science of Chinese Academy of Sciences(No.QYZDB-SSW-DQC041)+1 种基金the Program of Ministry of Science and Technology of People’s Republic of China(No.2015FY210300)the Self Deployment Project of Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences(No.YIC Y755021012)。
文摘To evaluate the status and changes of macrobenthic communities related to the construction of the Longkou Artificial Island(LAI)in the Bohai Sea,China,four annual surveys were conducted from 2010 to 2013.Significant changes on environmental variations and macrobenthic communities were observed in 2013 after the LAI construction a couple of years later.The changing environment was primarily presented by lower values of pH,dissolved oxygen(DO),organic material(OM)percentage,and higher salinity,suspended particulate matter(SPM)concentration and oil concentration.The main dominant species shifted from Polychaeta taxa in 2010 to Mollusca taxa in 2013 due to the changes of environmental variables.An apparent miniaturization tendency in body size of macrobenthic species was presented from 2010 to 2013.The biodiversity indices increased yearly from 2010 to 2013.However,inter-site homogenization was observed in both the community structure and health status.Multivariate AZTI Marine Biotic Index(M-AMBI)analysis showed that the health status of stations changed depending on its original status and distance to the LAI.However,no significant differences were found in the spatial distribution of either environmental variables or abundance,biomass and biodiversity of macrobenthic communities.All the results will provide a basis for the long-term ecological assessment of reclamation.
基金funded by the National Key Research and Development Program of China(No.2016YFC0402800)
文摘Longkou City is a coastal area,and lacks water resources.The overexploitation of groundwater causes seawater intrusion.At present,seawater intrudes an area of 68 km2.With the decrease of groundwater extraction,the seawater intrusion area has generally declined.The paper expounds the development process of seawater intrusion as well as the corresponding prevention and control measures of using groundwater replenishment and groundwater throttling in Longkou City.In view of the seawater intrusion problem in Longkou City,some adaptive management countermeasures are put forward,which include:Adjusting industrial and agricultural structure,promoting economic and social development to match water resources;improving water usage structure,optimizing the utilization of water resources;advancing the construction of a water-saving society,using water resources efficiently;implementing inter-basin water transfer,using water resources rationally;developing and utilizing unconventional water sources,making full use of water resources;strengthening water infrastructure construction,increasing the development and utilization potential of water resources;carrying out ecological restoration,protecting water resources and ecological environment;improving the management informationalization level,strengthening the capabilities of groundwater monitoring and management;increasing publicity,improving public awareness of participation.
文摘The coastal region of Longkou town in Shandong province belongs to one of severe disaster areas of seawater incursion in China. It is caused by continuously withdrawal of groundwater. The distribution of seawater incursion areas shows a consistence with that of the groundwater zone of negative table values, and both of them indicate an identical extending trend. Based on monitored data of groundwater withdrawal and seawater incursion, the relation between excessive withdrawal of groundwater and seawater incursion is analyzed by regression method. The results show that volume of excessive withdrawal of groundwater is closely related with values of the seawater incursion area. The measures and suggestions for controlling seawater incursion are also put forward.
基金This paper is the State key scientific research project 75-57-01-02-05 funded by the National Natural Science Foundation of China. Participating in the field work of the project were also Liu Coufan. Li Chunwei. Zou Zeyuan, Lin Jun, Ren Peiqi, Jiang Kehu
文摘The extensive intrusion （covering an area of 83.7-238.3 km;and accounting for 18.6-31.5% of the total area of the plain）, the presence of a transitional zone 1.5-6.0 km in width, and the interconnection in distribution between the seawater intrusion district and the region lower than the sea level caused by the strong drop of the groundwater level are major characteristics of the seawater intrusion in the study area. Cation exchange played an important role during the formation of chemical composition of the groundwater in the seawater intrusion district.
