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A Model Study on Dynamical Processes of Phytoplankton in laizhou Bay

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Journal of Ocean University of China 2014年第1期13卷 23-31页

作者： YU Lanlan YANG Bo JIANG Wensheng LI Keqiang Physical Oceanography Laboratory Ocean University of China College of Chemistry and Chemical Engineering Ocean University of China

A three-dimensional ecosystem model, using a PIC(Particle-In-Cell) method, is developed to reproduce the annual cycle and seasonal variation of nutrients and phytoplankton biomass in laizhou Bay. Eight state variables, i.e., DIN(dissolved inorganic nitrogen), phosphate, DON(dissolved organic nitrogen), DOP(dissolved organic phosphorus), COD(chemical oxygen demand), chlorophyll-a(Chl-a), detritus and the zooplankton biomass, are included in the model. The model successfully reproduces the observed temporal and spatial variations of nutrients and Chl-a biomass distributions in the bay. The nutrient concentrations are at high level in winter and at low level in summer. Double-peak structure of the phytoplankton(PPT) biomass exists in laizhou Bay, corresponding to a spring and an autumn bloom respectively. Several numerical experiments are carried out to examine the nutrient limitation, and the importance of the discharges of the Yellow River and Xiaoqinghe River. Both DIN limitation and phosphate limitation exist in some areas of the bay, with the former being more significant than the latter. The Yellow River and Xiaoqinghe River are the main pollution sources of nutrients in laizhou Bay. During the flood season, the algal growth is inhibited in the bay with the Yellow River discharges being excluded in the experiment, while in spring, the algal growth is enhanced with the Xiaoqinghe River excluded.

关键词： phytoplankton biomass 3D ecosystem model nutrients laizhou Bay

Study of the marine (saltwater) transgression in the palaeo-channels on the south coast plain of laizhou Bay

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Science China(Technological Sciences) 2001年第S1期44卷 80-85页

作者：韩美 Geography Department Shandong Normal University Jinan China

The palaeochannels in the studied region are divided into four stages by such methods as 14C dating. Marine (saltwater) transgression in the palaeochannels has been studied as a focal point. Palaeochannels are the main passageway through which the seawater (saltwater) transgresses. The seawater (saltwater) transgresses at a high speed, by many means and in a changeable dynamic state.

关键词： south coast plain of laizhou Bay palaeochannel marine transgression 14C-dating.

A PRELIMINARY STUDY ON THE DISTRIBUTION AND GENESIS OF UNDERGROUND BRINE IN THE LITTORAL PLAIN OF laizhou BAY IN THE BOHAI SEA

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Chinese Journal of Oceanology and Limnology 1993年第1期11卷 46-56页

作者：韩有松孟广兰王少青 Institute of Oceanology Academia Sinica Qingdao 266071

Quaternary underground brine in the littoral plain region of the Bohai coast is new type littoral facies evaporation ore deposit in liquid state . This model of " littorally- forming brine " is based on study of the distribution, depositional environment, forming / storing process, and genesis of underground brine in the coast of laizhou Bay . Essential conditions for genesis of brine are arid and semiarid climate , abundant sources of ancient seawater, and geological and geomorphological environment of wide tidal beach along a coast. The process of underground brine genesis may be : seawater/tidal beach-evaporation and concentration-seeping and accumulation- brine/tidal beach - burial (evolution of the sea- land )- underground brine .Underground brine is characterized by high content of chemical elements, shallow burial depth and easy exploitation . The process of extracting salt from underground brine present in the tidal flat is incomparably superior to that of producing salt from seawater, and has

关键词： underground brine littoral plain laizhou Bay

SALINE WATER INTRUSION AND ITS INFLUENCE IN THE laizhou AREA

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Chinese Journal of Oceanology and Limnology 1997年第4期15卷 342-349页

作者：邱汉学刘东雁刘贯群宁丕海 Ocean University of Qingdao Qingdao Water Utilization and Conservation Buearu of laizhou County China

The current salinization of groundwater in the laizhou area is controlled by three main factors:surge of the sea and inland residual seaweter seepage, original saline water deposited in marine sediment and excessive extraction of the coastal area groundwater. The saliniation of groundwater have obviously affected the local economy and human health.

关键词： saline water intrusion groundwater salinatiun laizhou area

Sediment distribution and provenance since Late Pleistocene in laizhou Bay,Bohai Sea,China

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China Geology 2019年第1期2卷 16-25页

作者： Mao-sheng Gao Fei Guo Xue-yong Huang Guo-hua Hou Qingdao Institute of Marine Geology China Geological SurveyMinistry of Natural ResourcesQingdao 266071China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Institute of Earth Environment Chinese Academy of SciencesXi'an 710061China Liaoning Normal University Dalian 116000China

There are three transgression-regression events and evolutions of the sedimentary environment by sea level changes since the Pleistocene in the southern section of the Bohai Sea, China. It is obvious that a multi-source fluvial delta sedimentary system may be more dominant in a sedimentary environment. Based on previous research and survey or historical data, we carried out studies on the division of sedimentary units, sedimentary facies analysis and strata division and comparison, which aim to establish the sedimentary stratigraph of laizhou Bay. We focus on the sedimentary procession of the laizhou Bay since the early Late Pleistocene. It can be divided into two glacial periods and three interglacial periods, corresponding to two regression and three transgression events in laizhou Bay since Late Pleistocene. In 124.6-72.0 ka BP, 60.0-24.4 ka BP and 10.2-4.0 ka BP, three times warm-wet periods occurred, respectively corresponding to the Cangzhou transgression, Xianxian transgression, and Huanghua transgression. In 72.0-60.0 ka BP and 24.4-10.2 ka BP, two dry and cold periods, it was the continental sedimentary environment, corresponding to Wurm early glacier and Wurm late glacier. The results show:(1) Sediments have the characteristics of phase and stage under the terrestrial input of the Yellow River and middle-small rivers in the southern section of the Bohai Sea.(2) PI moved towards coastal in Cangzhou transgression strata in early Late Pleistocene. PI moved northward from land in Xianxian transgression strata in the late Pleistocene. PI moved further north in the Huanghua transgression strata in Holocene.(3) During the regressive period, the land source input increased and the estuarine or lagoon sedimentation developed, which manifested as progradational superposition.(4) During the transgressive period, it mainly developed shallow coastal sediment and transitionally formed regressive deposition to the south in delta/tidal flat deposition.

关键词： Late Pleistocene Holocene PI Sediment laizhou Bay

Combined Impacts of MSL Rise and the Secular Trend in MLTR on Marine Environment in the Areas Around the Huanghe River Mouth

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Marine Science Bulletin 2000年第1期2卷 6-13页

作者：张锦文王骥 National Marine Data and Information Service Tianjin China 300171

Mean sea level (MSL) rise and the mean large tidal range (MLTR) becoming larger caused by sediment accumulation and subsidence in the areas around the Huanghe River mouth and the laizhou Bay are presented in this *** results obtained from the tidal numerical simulation and the statistical observed tide data show that the relative MSL rises and the tidal range becomes larger at a quicker rate, so the marine environment and coastline of the laizhou Bay are changing rapidly. The engineering design standard along the coasts has to be raised.

关键词： laizhou bay sediment mean sea level design standard Huanghe estuary