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Rare earth elemental and Sr isotopic evidence for seawater intrusion event of the Songliao Basin 91 million years ago 被引量:1
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作者 Yu-Ke Liu Hua-jian Wang +5 位作者 Jin-You Zhang Zhen-Wu Liu Fa-Zi Chen Xiao-Mei Wang Shui-Chang Zhang He Liu 《Petroleum Science》 SCIE EI CAS CSCD 2023年第3期1347-1362,共16页
Petrogenesis of lacustrine dolostone is closely related with paleo-lake water conditions.Here we report the high spatial-resolution petrographic and geochemical results of a lacustrine dolomite nodule from the Qingsha... Petrogenesis of lacustrine dolostone is closely related with paleo-lake water conditions.Here we report the high spatial-resolution petrographic and geochemical results of a lacustrine dolomite nodule from the Qingshankou Formation,the Songliao Basin.Sedimentary and elemental signatures confirm the protogenetic origin of this nodule and its effectiveness in recording geochemical characteristics of paleo-lake water during dolomitization.The low Y/Ho ratios,middle rare earth element(MREE)enrichment and subtle positive Eu anomalies within the nodule indicate a fresh water source.However,the Sr isotope values in the core of the nodule(0.7076-0.7080)are close to contemporaneous seawater(0.7074),yet different from the modern river(0.7120)and the host black shale(0.7100).On the premise of excluding the influence of hydrothermal fluids,the significantly low strontium isotope values of the lacustrine dolomite might be caused by seawater interference during dolomitization.Our findings demonstrate that lacustrine dolomite within black shales is not only a faithful tracer of diagenetic water environment,but also a novel and easily identified mineralogical evidence for episodic seawater intrusion event(91 Ma)in the Songliao Basin,which supplements other paleontological and geochemical evidence. 展开更多
关键词 Songliao Basin Lacustrine dolostone seawater intrusion Rare earth elements Strontium isotope
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Research and Application of High-Density Resistivity Method in Seawater Intrusion Investigation in Laizhou Bay
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作者 Yuhai HE Hongjin WANG +3 位作者 Zengcai ZHAO Biao WANG Bin ZHANG Xiaodan WANG 《Agricultural Biotechnology》 2023年第6期88-92,共5页
The disaster of seawater intrusion seriously affects people's lives and restricts economic development,so the detection and treatment of seawater intrusion is a long-term task.On the basis of field investigation a... The disaster of seawater intrusion seriously affects people's lives and restricts economic development,so the detection and treatment of seawater intrusion is a long-term task.On the basis of field investigation and water quality analysis,according to the change characteristics of apparent resistivity of groundwater after Cl-reaches 250 mg/L,the theoretical basis for the application of high-density resistivity method was determined,and the characteristic values of apparent resistivity for seawater intrusion interfaces in different geological characteristic regions in Laizhou Bay area were determined by typical profile tests.Combined with water quality investigation and other means,profiles for the high-density resistivity method were arranged,and the interfaces between saline and fresh water were accurately divided. 展开更多
关键词 High-density resistivity method seawater intrusion Laizhou Bay Characteristic value
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SEAWATER INTRUSION TYPES AND REGIONAL DIVISIONS IN THE SOUTHERN COAST OF LAIZHOU BAY 被引量:4
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作者 孟广兰 韩有松 +1 位作者 王少青 王珍岩 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2002年第3期277-284,共8页
The southern coast of Laizhou Bay, Bohai Sea, is one of the areas in China most seriously impacted by seawater intrusion. Based on the sources of intruding waterbodies, seawater intrusion can be divided into two types... The southern coast of Laizhou Bay, Bohai Sea, is one of the areas in China most seriously impacted by seawater intrusion. Based on the sources of intruding waterbodies, seawater intrusion can be divided into two types: intrusion of saline water derived from modern seawater, and intrusion of subsurface brine and saline water derived from paleo seawater in shallow Quaternary sediments. There are some distinct differences in their formation, mechanism and damage. The subsurface brine intrusion is a special type, which can cause very serious disaster. The coastal landform and the Quaternary hydrogeological environment are predominant factors in the classification of seawater intrusion types. Various coastal environments in different coastal sections result in three types of intrusion: seawater intrusion, saline groundwater intrusion, and mixed seawater and saline water intrusion, in the southern coast of Laizhou Bay, which can be divided into four areas: the seawater intrusion area in the northern Laizhou City coast, the mixed seawater and saline groundwater intrusion area in the Baisha River Jiaolai River mouth plain area, the mixed seawater and saline groundwater intrusion area in the Weihe River mouth plain area northern Changyi county coast, and the saline groundwater intrusion area in the northern Shouguang plains. 展开更多
关键词 southern coast of Laizhou Bay seawater intrusion type
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Uncertainty analysis of seawater intrusion forecasting 被引量:1
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作者 Zhong-wei ZHAO Jian ZHAO Chang-sheng FU 《Water Science and Engineering》 EI CAS CSCD 2013年第4期380-391,共12页
In order to describe the importance of uncertainty analysis in seawater intrusion forecasting and identify the main factors that might cause great differences in prediction results, we analyzed the influence of sea le... In order to describe the importance of uncertainty analysis in seawater intrusion forecasting and identify the main factors that might cause great differences in prediction results, we analyzed the influence of sea level rise, tidal effect, the seasonal variance of influx, and the annual variance of the pumping rate, as well as combinations of different parameters. The results show that the most important factors that might cause great differences in seawater intrusion distance are the variance of pumping rate and combinations of different parameters. The influence of sea level rise can be neglected in a short-time simulation (ten years, for instance). Retardation of seawater intrusion caused by tidal effects is obviously important in aquifers near the coastline, but the influence decreases with distance away from the coastline and depth away from the seabed. The intrusion distance can reach a dynamic equilibrium with the application of the sine function for seasonal effects of influx. As a conclusion, we suggest that uncertainty analysis should be considered in seawater intrusion forecasting, if possible. 展开更多
关键词 Key words: seawater intrusion forecasting uncertainty analysis deterministic model uncertainty model factorial design
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Simulation of Seawater Intrusion in Coastal Confined Aquifer Using a Point Collocation Method Based Meshfree Model 被引量:2
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作者 Alice Thomas T. I. Eldho A. K. Rastogi 《Journal of Water Resource and Protection》 2016年第4期534-549,共16页
Seawater intrusion caused by groundwater over-exploitation from coastal aquifers poses a severe problem in many regions. Formulation of proper pumping strategy using a simulation model can assure sustainable supply of... Seawater intrusion caused by groundwater over-exploitation from coastal aquifers poses a severe problem in many regions. Formulation of proper pumping strategy using a simulation model can assure sustainable supply of fresh water from the coastal aquifers. The focus of the present study is on the development of a numerical model based on Meshfree (MFree) method to study the seawater intrusion problem. For the simulation of seawater intrusion problem, widely used models are based on Finite Difference (FDM) and Finite Element (FEM) Methods, which demand well defined grids/meshes and considerable pre-processing efforts. Here, MFree Point Collocation Method (PCM) based on the Radial Basis Function (RBF) is proposed for the simulation. Diffusive interface approach with density-dependent dispersion and solution of flow and solute transport is adopted. These equations are solved using PCM with appropriate boundary conditions. The developed model has been verified with Henry’s problem, and found to be satisfactory. Further the model has been applied to another established problem and an attempt is made to examine the influence of important system parameters including pumping and recharge on the seawater intrusion. The PCM based MFree model is found computationally efficient as preprocessing is avoided when compared to other numerical methods. 展开更多
关键词 Confined Aquifer seawater intrusion Meshfree Method Point Collocation Method Diffusive Interface
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State of seawater intrusion and its adaptive management countermeasures in Longkou City of China 被引量:1
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作者 ZHONG Hua-ping WU Yong-xiang 《Journal of Groundwater Science and Engineering》 2020年第1期30-42,共13页
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
关键词 seawater intrusion GROUNDWATER Adaptive management COUNTERMEASURES Longkou City
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Seawater Intrusion in the Longkou-Laizhou Area, Shandong
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作者 Xue Yuqun, Xie Chunhong, Wu Jichun, Nanjing University Liu Peimin, Wang Jianji, Jiang Qingbo Office of Water Resources of Longkou City Shi Hongwen and Ning Pihai Office of Water Resources of Laizhou City Liu Linqun 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1993年第1期107-120,共14页
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
关键词 seawater intrusion fresh water-saline water interface transitional zone cation exchange the area with negative groundwater level Longkou-Laizhou area of Shandong
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Numerical Simulation of Seawater Intrusion from Estuary into River Using a Coupled Modeling System
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作者 ZOU Huazhi LI Hualun 《Journal of Ocean University of China》 SCIE CAS 2010年第3期219-228,共10页
One of the most important causes of the freshwater shortage in estuarine area is the increasing seawater intrusion into the river.To simulate seawater intrusion properly,two important factors should be considered.One ... One of the most important causes of the freshwater shortage in estuarine area is the increasing seawater intrusion into the river.To simulate seawater intrusion properly,two important factors should be considered.One is the bidirectional and time-dependent coupling effects between river discharges and tidal forces.The other is the three-dimensional and stratified structure of dynamic processes involved.However,these two factors have rarely been investigated simultaneously,or they were often simplified in previous researches,especially for the estuary connected with an upstream river network through multiple outlets such as the Pearl River Estuary(PRE).In order to consider these two factors,a numerical modeling system,which couples a one-dimensional river network model with a three-dimensional unstructured-grid Finite-Volume Coastal Ocean Model(FVCOM),has been developed and successfully applied to the simulation of seawater intrusion into rivers emptying into the PRE.By treating the river network with a one-dimensional model,computational efficiency has been improved.With coupling 1D and 3D models,the specification of upstream boundary conditions becomes more convenient.Simulated results are compared with field measured data.Good agreement indicates that the modeling system may correctly capture the physical processes of seawater intrusion into rivers. 展开更多
关键词 numerical model ESTUARY seawater intrusion
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Study on the Status Quo and Prevention-control Measures of Seawater Intrusion in Qingdao City
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作者 SUN Jian-ming LI Jia-jia GAO Zong-jun 《Meteorological and Environmental Research》 CAS 2012年第12期46-49,共4页
Firstly, the general situation, influencing factors and damage of seawater intrusion in Qingdao City, Shandong Province were analyzed, and then some appropriate remedial measures were put forward, such as improving gr... Firstly, the general situation, influencing factors and damage of seawater intrusion in Qingdao City, Shandong Province were analyzed, and then some appropriate remedial measures were put forward, such as improving groundwater monitoring system in costal areas, exploiting groundwater reasonably, building underground cut-off walls and strengthening river management, which would provide a new approach for the prevention and control of seawater intrusion in Qingdao City. 展开更多
关键词 Qingdao City seawater intrusion Current situation Influencing factor Prevention-control measures China
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Study on Seawater Intrusion in Kiaochow Bay Region
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作者 Xin Guo Jianwei Zhang +4 位作者 Ying Xu Hao Xu Guangfa Ding Zijian Wang Xueying Ma 《Meteorological and Environmental Research》 CAS 2013年第1期39-40,共2页
General situation of the seawater intrusion in Kiaochow Bay region was analyzed. Current status of the seawater intrusion and its formation mechanism, influence factor and hazard in Kiaochow Bay region were summarized... General situation of the seawater intrusion in Kiaochow Bay region was analyzed. Current status of the seawater intrusion and its formation mechanism, influence factor and hazard in Kiaochow Bay region were summarized. Finally, against seawater intrusion situation in the region, a series of practical prevention and control countermeasures were proposed. 展开更多
关键词 Kiaochow Bay region seawater intrusion Control countermeasure China
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Assessing the Seawater Intrusion Due to Beach Wells in the Desalination Plant
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作者 Yunes Mogheir 《Journal of Geoscience and Environment Protection》 2016年第12期37-47,共12页
Short-Term Low Volume (STLV) Sea Water Desalination Plant of 6000 m<sup>3</sup>/d is under construction in the middle area of Gaza Strip. The plant will provide desalinated water for 75,000 inhabitants in ... Short-Term Low Volume (STLV) Sea Water Desalination Plant of 6000 m<sup>3</sup>/d is under construction in the middle area of Gaza Strip. The plant will provide desalinated water for 75,000 inhabitants in regions in Khanyounis and Rafah. The intake of desalination plant will be indirectly from four beach wells. This article aims at providing the environmental impacts of these wells on the aquifer and the mitigation measures in case of negative impacts. In order to study the impacts of beach wells on the aquifer, a prediction groundwater three-dimensional model for the beach wells area, starting from the year 2000 until year 2030, was used. MODFLOW software was used for modeling the groundwater flow and SEAWAT software was used to model the seawater intrusion effect. The aquifer parameters were set as if they were in the transient model. The long term seasonal recharge rate for the summer and winter is considered to represent the seasonal differences in recharge through each year. The study showed that the steady four-meter drawdown in the beach wells will force the flow from the eastern direction to the sea. This will have positive impacts on the aquifer since it will decrease the seawater intrusion to the aquifer. The beach wells will pump water with Cl concentration equal to 18,000 mg/l. This means that the beach wells will accelerate the flow from the aquifer to the sea direction but still the pumped water is considered as seawater. This indicates the positive impacts on the groundwater aquifer since it will decrease the seawater intrusion in the beach wells area (Gaza Strip Middle area). In conclusion, these beach wells in this desalination plant (small capacity) are safe for the groundwater aquifer and it will decrease the effect of seawater intrusion on the aquifer. 展开更多
关键词 Beach Wells AQUIFER seawater intrusion CHLORIDE DESALINATION
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Study on the Cause and Dynamics of Seawater Intrusion in Laizhou Bay
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作者 Pan Wang Yongjie Zheng 《International Journal of Technology Management》 2016年第10期24-27,共4页
In this paper, we conduct research on the cause and dynamics of seawater intrusion in the Laizhou bay. To consider modelling the Laizhou bay, we should then take the listed tools into consideration. In actual engineer... In this paper, we conduct research on the cause and dynamics of seawater intrusion in the Laizhou bay. To consider modelling the Laizhou bay, we should then take the listed tools into consideration. In actual engineering, wave is a complicated stochastic process. If the numerical value of wave model is a little too large, the wave attenuation should be considered sufficiently, such as wave refraction caused by terrain change, wave attenuation due to submarine friction, wave into the very shallow waters of the broken and small wind area. We integrate the current conition of the Laizhou bay and the further model the seawater intrusion steps. The uncertainty research of ground water solute migration is at present a ground water research area quite popular topic, but the seawater intrusion is the variable density class solute migration issue, applies the uncertainty analysis of seawater intrusion simulation also to have certain difficulty the existing research results. In the future, more simulation will be down to verify the effectiveness. 展开更多
关键词 Cause and Dynamics seawater intrusion Laizhou Bay General Review
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PREDICTING THE CONSEQUENCES OF SEAWATER INTRUSION AND PROTECTION PROJECTS 被引量:2
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作者 袁益让 梁栋 芮洪兴 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2001年第11期1291-1300,共10页
The simulation of this process and the effects of protection projects lays the foundation of its effective control and defence. The mathematical model of the problem and upwind splitting alternating direction method w... The simulation of this process and the effects of protection projects lays the foundation of its effective control and defence. The mathematical model of the problem and upwind splitting alternating direction method were presented. Using this method, the numerical simulation of seawater intrusion in Laizhou Bay Area of Shandong Provivce was finished. The numerical results turned out to be identical with the real measurements, so the prediction of the consequences of protection projectects is reasonable. 展开更多
关键词 seawater intrusion predictive simulation numerical simulation splitting algorithm upwind scheme
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A DISCONTINUOUS GALERKIN METHOD COMBINED WITH MIXED FINITE ELEMENT FOR SEAWATER INTRUSION PROBLEM
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作者 Ximeng LIAN Hongxing RUI 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2010年第4期830-845,共16页
Seawater intrusion problem is considered in this paper.Its mathematical model is anonlinear coupled system of partial differential equations with initial boundary problem.It consistsof the water head equation and the ... Seawater intrusion problem is considered in this paper.Its mathematical model is anonlinear coupled system of partial differential equations with initial boundary problem.It consistsof the water head equation and the salt concentration equation.A combined method is developedto approximate the water head equation by mixed finite element method and concentration equationby discontinuous Galerkin method.The scheme is continuous in time and optimal order estimates inH^1-norm and L^2-norm are derived for the errors. 展开更多
关键词 Discontinuous Galerkin method mixed finite element method seawater intrusion problem.
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CHARACTERISTICS-FINITE ELEMENT METHODS FOR SEAWATER INTRUSION NUMERICAL SIMULATION AND THEORETICAL ANALYSIS 被引量:9
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作者 袁益让 梁栋 芮洪兴 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 1998年第1期11-23,共13页
Both numerical simulation and theoretical analysis of seawater intrusion in coastal regions are of great theoretical importance in environmental sciences. The mathematical model can be described as a problem of the in... Both numerical simulation and theoretical analysis of seawater intrusion in coastal regions are of great theoretical importance in environmental sciences. The mathematical model can be described as a problem of the initial boundary values for a system of 3-dimensional nonlinear parabolic partial differential equations, one being the pressure flow equation and the other is the concentration convection-dispersion equation of the salt contained. For a generic case of a 3-dimensional bounded region, a backward-difference time-stepping scheme is defined. It approximates the pressure by the standard Galerkin procedure and the concentration by a Galerkin method of charederistics, where calculus of variations, theory of prior estimates and techniques are made use of Optimal order estimates in H1 norm are derived for the errors in the approximate solution. 展开更多
关键词 seawater intrusion 3-dimensional problem characteristics-finite element optimal order H1 estimates
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The Alternating-Direction Schemes and Numerical Analysis for the Three-dimensional Seawater Intrusion Simulation 被引量:1
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作者 Zhi-yue ZhangLASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China & School of Mathematics and Computer Science, Nanjing Normal University, Nanjing 210097, China 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2002年第3期389-404,共16页
Both numerical simulation and theoretical analysis of seawater intrusion in coastal regions are of great theoretical importance in environmental sciences. The mathematical model can be described as a coupled system of... Both numerical simulation and theoretical analysis of seawater intrusion in coastal regions are of great theoretical importance in environmental sciences. The mathematical model can be described as a coupled system of three dimensional nonlinear partial differential equations with initial-boundary value problems. In this paper, according to the actual conditions of molecular and three-dimensional characteristic of the problem, we construct the characteristic finite element alternating-direction schemes which can be divided into three continuous one-dimensional problems. By making use of tensor product algorithm, and priori estimation theory and techniques, the optimal order estimates in H1 norm are derived for the error in the approximate solution. 展开更多
关键词 THREE-DIMENSIONAL seawater intrusion characteristic finite element alternating-direction optimal order estimate in H^1
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Solute transport and geochemical modeling of the coastal quaternary aquifer, Delta Dahab Basin, South Sinai, Egypt
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作者 Amira Samy Mustafa Eissa +2 位作者 Seham Shahen Moustafa M.Said Rabab M.Abou-shahaba 《Acta Geochimica》 EI CAS CSCD 2024年第1期16-39,共24页
The wadi dahab delta is in a dry, arid coastal zone within Egypt’s south Sinai Peninsula’s eastern portion. The primary water source is the Quaternary coastal alluvial aquifer. The groundwater salinity varies from 8... The wadi dahab delta is in a dry, arid coastal zone within Egypt’s south Sinai Peninsula’s eastern portion. The primary water source is the Quaternary coastal alluvial aquifer. The groundwater salinity varies from 890to 8213 mg/L, with a mean value of 3417 mg/L. The dissolved major ions have been used to calculate the seawater mixing index(SWMI) using a linear equation that discriminates the groundwater mostly affected by water–rock interaction(SWMI 1>) and other samples mixed with Seawater(SWMI < 1). The isotopic composition of groundwater for specifically chosen groundwater samples ranges from-0.645‰ to +5.212‰ for δ^(18)O and from-9.582‰ to + 22.778‰ for δ^(2)H, where the seawater represented by a Red Sea water sample(δ^(18)O + 1.64‰-δ^(2)H + 9.80‰) and reject brine water are considerably enriched the isotopic groundwater values. The geochemical NETPATH model constrained by the dissolved significant ions, isotopes, and the rock aquifer forming minerals as phases indicate the mixing percent with the seawater ranges from 9% to 97% of seawater from 91% to 3% of original recharge water. According to the SEAWAT 3-D flow models, seawater has penetrated the Northeastern Dahab delta aquifer, with the intrusion zone extending1500 m inland. The salt dissolution, upwelling of saline water, recharge from the upstream mountain block, and seawater encroachment are the primary aspects contributing to the deterioration of groundwater quality. These findings may have significance for effective groundwater withdrawal management in arid locations worldwide with similar hydrogeological systems. 展开更多
关键词 Groundwater geochemistry seawater intrusion Solute transport SEAWAT
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Characteristics and genesis of groundwater salinization in coastal areas of the Lower Reaches of Oujiang Basin
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作者 Mei-hui Zhang Shi-yang Zhou +8 位作者 Dan-dan Liu Ying Zhang Yu-xi Zhang Xi Chen Hui-wei Wang Bei Li Wei Kang Bing Yi Wan-peng Shi 《Journal of Groundwater Science and Engineering》 2024年第2期190-204,共15页
The coastal areas of the lower reaches of Oujiang River Basin are rich in groundwater resources.However,the unsustainable exploitation and utilization of groundwater have led to significant changes in the groundwater ... The coastal areas of the lower reaches of Oujiang River Basin are rich in groundwater resources.However,the unsustainable exploitation and utilization of groundwater have led to significant changes in the groundwater environment.Understanding the characteristics and genesis of groundwater salinization is crucial for preventing its deterioration and ensuring sustainable utilization.In this study,a comprehensive approach combining the ion ratio method,mineral saturation index method and multivariate statistical analysis was employed to investigate the hydrochemical characteristics and main controlling factors in the study area.The findings reveal that:(1)Groundwater samples in study area exhibit a neutral to slightly alkaline pH.The predominant chemical types of unconfined water are HCO_(3)-Ca·Na,HCO_(3)·Cl-Na·Ca and HCO_(3)·SO_(4)-Ca·Na,while confined water mainly exhibits Cl·HCO_(3)-Na and Cl-Na types.(2)Salinity coefficients indicate an increase in salinity from unconfined to confined water.TDS,Na^(+)and Cl^(–)concentrations show an increasing trend from mountainous to coastal areas in unconfined water,while confined water displays variability in TDS,Na^(+)and Cl^(–)concentrations.(3)Groundwater salinity is mainly influenced by water-rock interactions,including the dissolution of halite and gypsum,cation exchange,and seawater intrusion etc.Additionally,human activities and carbonate dissolution contribute to salinity in unconfined water.Seawater intrusion is identified as the primary factor leading to higher salinity in confined water compared to unconfined water,with increasing cation exchange and seawater interaction observed from unconfined to confined water. 展开更多
关键词 Hydrochemical Multivariate statistical analysis seawater intrusion
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Uncertainty and Sensitivity Analyses of the Simulated Seawater—Freshwater Mixing Zones in Steady-State Coastal Aquifers 被引量:1
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作者 赵忠伟 赵坚 +2 位作者 辛沛 华国芬 金光球 《China Ocean Engineering》 SCIE EI CSCD 2015年第4期489-502,共14页
The uncertainty and sensitivity of predicted positions and thicknesses of seawater-freshwater mixing zones with respect to uncertainties of saturated hydraulic conductivity, porosity, molecular diffusivity, longitudin... The uncertainty and sensitivity of predicted positions and thicknesses of seawater-freshwater mixing zones with respect to uncertainties of saturated hydraulic conductivity, porosity, molecular diffusivity, longitudinal and transverse dispersivities were investigated in both head-control and flux-control inland boundary systems. It shows that uncertainties and sensitivities of predicted results vary in different boundary systems. With the same designed matrix of uncertain factors in simulation experiments, the variance of predicted positions and thickness in the flux-control system is much larger than that predicted in the head-control system. In a head-control system, the most sensitive factors for the predicted position of the mixing zone are inland freshwater head and transverse dispersivity. However, the predicted position of the mixing zone is more sensitive to saturated hydraulic conductivity in a flux-control system. In a head-control system, the most sensitive factors for the predicted thickness of the mixing zone include transverse dispersivity, molecular diffusivity, porosity, and longitudinal dispersivity, but the predicted thickness is more sensitive to the saturated hydraulic conductivity in a flux-control system. These findings improve our understandings for the development of seawater-freshwater mixing zone during seawater intrusion processes, and give technical support for groundwater resource management in coastal aquifers. 展开更多
关键词 seawater intrusion mixing zone uncertainty analysis fractional factorial design Morris "s OAT design coastal aquifer
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Ground water hydrochemical characteristics: seawater intruded area in eastern and southern coast of Laizhou Bay 被引量:1
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作者 ZHANG Zu-lu, JIANG Lu-guang, YANG Li-yuan, QI Yong-hua (Department of Geography, Shandong Normal University, Jinan 250014, China) 《Journal of Geographical Sciences》 SCIE CSCD 2001年第3期350-355,共6页
Eastern and southern coastal zones of Laizhou Bay are the most representative seawater intruded areas in the world, with two intrusion sources of contemporary seawater and paleobrine. In order to reveal the complicate... Eastern and southern coastal zones of Laizhou Bay are the most representative seawater intruded areas in the world, with two intrusion sources of contemporary seawater and paleobrine. In order to reveal the complicated hydrochemical changing process and the mechanism of fresh groundwater being polluted by saltwater, we conducted long-term observation and hydrochemical analysis at four observing sections of typical salt-fresh water transitional zone. The study indicates that seawater and brine intrusion processes have different hydrochemical features, and that ion exchange and adsorption actions between water and aquifer produce great influence on the intrusion. 展开更多
关键词 seawater intrusion eastern and southern coastal areas of Laizhou Bay hydrochemical characteristics of groundwater
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