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A Three-Dimensional Water Quality Model and Its Application to Jiaozhou Bay, China 被引量:2
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作者 张燕 孙英兰 +2 位作者 余静 袁道伟 张瑞瑾 《China Ocean Engineering》 SCIE EI 2012年第4期669-684,共16页
A three-dimensional coupled physical and water quality model was developed and applied to the Jiaozhou Bay to study water quality involving nutrients, biochemical oxygen demand, dissolved oxygen, and phytoplankton tha... A three-dimensional coupled physical and water quality model was developed and applied to the Jiaozhou Bay to study water quality involving nutrients, biochemical oxygen demand, dissolved oxygen, and phytoplankton that are closely related to eutrophication process. The physical model is a modified ECOM-si version with inclusion of flooding/draining processes over the intertidal zone. The water quality model is based on WASP5 which quantifies processes governing internal nutrients cycling, dissolved oxygen balance and phytoplankton growth. The model was used to simulate the spatial distribution and the temporal variation of water quality in the Jiaozhou Bay for the period of May 2005 to May 2006. In addition, the effect of reduction of riverine nutrients load was simulated and evaluated. The simulated results show that under the influence of nutrients discharged from river, the concentrations of nutrients and phytoplankton were higher in the northwest and northeast of the bay, and decreased from the inner bay to the outer. Affected by strong tidal mixing, the concentrations of all state variables were vertically homogeneous except in the deeper regions where a small gradient was found. Obvious seasonal variation of phytoplankton biomass was found, which exhibited two peaks in March and July, respectively. The variation of riverine waste loads had remarkable impact on nutrients concentration in coastal areas, but slightly altered the distribution in the center of the bay. 展开更多
关键词 water quality model EUTROPHICATION numerical simulation three-DIMENSIONAL Jiaozhou Bay
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Three-Dimensional Tidal Model and Its Application to Numerical Simulation of Water Quality in Coastal Waters 被引量:5
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作者 Shen Yongming , Li Yucheng and Zhao Wenqian Associate Professor, Department of Civil Engineering, Dalian University of Technology, Dalian 116023 Professor, Department of Civil Engineering, Dalian University of Technology, Dalian 116023 Professor, Department of Civil Engineering, Sichuan Union University, Chengdu 610065 《China Ocean Engineering》 SCIE EI 1994年第4期425-436,共12页
The turbulence mechanism plays an important part in the mixing process and momentum transfer of turbulence. A three-dimensional Prandtl mixing length tidal model has been developed to simulate tidal flows and water qu... The turbulence mechanism plays an important part in the mixing process and momentum transfer of turbulence. A three-dimensional Prandtl mixing length tidal model has been developed to simulate tidal flows and water quality. The eddy viscosities and diffusivities are computed from the Prandtl mixing length model. In order to model the water quality of an estuary or coastal area many interdependent processes need to be simulated. These may be conveniently separated into three main groups: transport and mixing processes, biochemical interaction of water quality variables and the utilization and re-cycling of nutrients by living matter. The model simulates full oxygen and nutrient balance, primary productivity and the transport, reaction mechanism and fate of pollutants over tidal time-scales. The model is applied to numerical simulation of tidal flows and water quality in Dalian Bay. The model has been calibrated against a limited data set of historical water quality observations and in general demonstrates excellent agreement with all available data. 展开更多
关键词 three-DIMENSION tidal flows water quality ECOSYSTEM mixing length model coastal waters
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Three-Dimensional Water-Quality Simulation for River Based on VOF Method 被引量:1
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作者 Ao Xuefei Wang Xiaoling +2 位作者 Song Mingrui Deng Shaohui Li Songmin 《Transactions of Tianjin University》 EI CAS 2016年第5期426-433,共8页
In the present study, considering the transport and transformation processes of variables, a threedimensional water quality model for the river system was established, which coupled the volume of fluid(VOF) method wit... In the present study, considering the transport and transformation processes of variables, a threedimensional water quality model for the river system was established, which coupled the volume of fluid(VOF) method with the k-ε turbulence mathematical model. Then, the water hydrodynamic characteristics and transport processes for BOD_5, NH_(3^-)N and TP were analyzed. The results showed that the water surface of convex bank was a little lower than that of concave bank due to the centrifugal force near the bend, and most concentrations were inferior to the type Ⅴ standard indexes of surface water environmental quality. The model validation indicated that the errors between the simulated and monitored values were comparatively small, satisfying the application demands and providing scientific basis and decision support for the restoration and protection of water quality. 展开更多
关键词 three-DIMENSIONAL water QUALITY model volume of FLUID method k-ε turbulence mathematical model RIVER water QUALITY computational FLUID dynamics
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Three-Dimension Mathematical Model of Total Phosphor in the Reservoir and Application 被引量:2
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作者 NIEJing YANGTian-xing LIUXiao-duan 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2004年第3期294-298,共5页
Taking the transport of total phosphor pollutants in the Beijing Miyun reservoir for example,we have obtained three dimensional distributing regularity of total phosphor pollutants by the calculation of the linear int... Taking the transport of total phosphor pollutants in the Beijing Miyun reservoir for example,we have obtained three dimensional distributing regularity of total phosphor pollutants by the calculation of the linear interpolation value of each point between horizontal layers. The credibility analysis in allusion to this method was carried out and the programming scheme for realizing this method was set forth. 展开更多
关键词 water body Total phosphor three dimensional mathematical model
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Three-dimensional physical simulation and optimization of water injection of a multi-well fractured-vuggy unit 被引量:6
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作者 Ji-Rui HOU Ze-Yu Zheng +4 位作者 Zhao-Jie Song Min LUO Hai-Bo Li Li Zhang Deng-Yu Yuan 《Petroleum Science》 SCIE CAS CSCD 2016年第2期259-271,共13页
With complex fractured-vuggy heterogeneous structures, water has to be injected to facilitate oil pro- duction. However, the effect of different water injection modes on oil recovery varies. The limitation of existing... With complex fractured-vuggy heterogeneous structures, water has to be injected to facilitate oil pro- duction. However, the effect of different water injection modes on oil recovery varies. The limitation of existing numerical simulation methods in representing fractured- vuggy carbonate reservoirs makes numerical simulation difficult to characterize the fluid flow in these reservoirs. In this paper, based on a geological example unit in the Tahe Oilfield, a three-dimensional physical model was designed and constructed to simulate fluid flow in a fractured-vuggy reservoir according to similarity criteria. The model was validated by simulating a bottom water drive reservoir, and then subsequent water injection modes were optimized. These were continuous (constant rate), intermittent, and pulsed injection of water. Experimental results reveal that due to the unbalanced formation pressure caused by pulsed water injection, the swept volume was expanded and consequently the highest oil recovery increment was achieved. Similar to continuous water injection, intermit- tent injection was influenced by factors including the connectivity of the fractured-vuggy reservoir, well depth, and the injection-production relationship, which led to a relative low oil recovery. This study may provide a constructive guide to field production and for the devel- opment of the commercial numerical models specialized for fractured-vuggy carbonate reservoirs. 展开更多
关键词 Multi-well fractured-vuggy unit three-dimensional physical model Similarity criteria Bottom water drive. Optimization of water injection mode
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The 3D simulation and optimized management model of groundwater systems based on eco-environmental water demand
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作者 Zhang Guang-xin Deng Wei He Yan 《Journal of Geographical Sciences》 SCIE CSCD 2002年第2期103-112,共10页
Through the study of mutual process between groundwater systems and eco-environmental water demand, the eco-environmental water demand is brought into groundwater systems model as the important water consumption item ... Through the study of mutual process between groundwater systems and eco-environmental water demand, the eco-environmental water demand is brought into groundwater systems model as the important water consumption item and unification of groundwater抯 economic, environmental and ecological functions were taken into account. Based on eco-environmental water demand at Da抋n in Jilin province, a three-dimensional simulation and optimized management model of groundwater systems was established. All water balance components of groundwater systems in 1998 and 1999 were simulated with this model and the best optimal exploitation scheme of groundwater systems in 2000 was determined, so that groundwater resource was efficiently utilized and good economic, ecologic and social benefits were obtained. 展开更多
关键词 groundwater systems eco-environmental water demand three-dimensional simulation model optimized management model ecologically fragile area
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Reservoir operation schemes for water pollution accidents in Yangtze River 被引量:4
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作者 Xiao-kang XIN Wei YIN Meng WANG 《Water Science and Engineering》 EI CAS 2012年第1期59-66,共8页
After the Three Gorges Reservoir starts running, it can not only take into consideration the interest of departments such as flood control, power generation, water supply, and shipping, but also reduce or eliminate th... After the Three Gorges Reservoir starts running, it can not only take into consideration the interest of departments such as flood control, power generation, water supply, and shipping, but also reduce or eliminate the adverse effects of pollutants by discharge regulation. The evolution of pollutant plumes under different operation schemes of the Three Gorges Reservoir and three kinds of pollutant discharge types were calculated with the MIKE 21 AD software. The feasibility and effectiveness of the reservoir emergency operation when pollution accidents occur were investigated. The results indicate that the emergency operation produces significant effects on the instantaneous discharge type with lesser effects on the constant discharge type, the impact time is shortened, and the concentration of pollutant is reduced. Meanwhile, the results show that the larger the discharge is and the shorter the operation duration is, the more favorable the result is. 展开更多
关键词 water pollution accident emergency operation water environment model three Gorges Reservoir
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Flood management of Dongting Lake after operation of Three Gorges Dam 被引量:7
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作者 Xi-jun Lai Zi-ming Wang 《Water Science and Engineering》 EI CAS CSCD 2017年第4期303-310,共8页
Full operation of the Three Gorges Dam(TGD) reduces flood risk of the middle and lower parts of the Yangtze River Basin. However,Dongting Lake, which is located in the Yangtze River Basin, is still at high risk for po... Full operation of the Three Gorges Dam(TGD) reduces flood risk of the middle and lower parts of the Yangtze River Basin. However,Dongting Lake, which is located in the Yangtze River Basin, is still at high risk for potentially severe flooding in the future. The effects of the TGD on flood processes were investigated using a hydrodynamic model. The 1998 and 2010 flood events before and after the operation of the TGD, respectively, were analyzed. The numerical results show that the operation of the TGD changes flood processes, including the timing and magnitude of flood peaks in Dongting Lake. The TGD can effectively reduce the flood level in Dongting Lake, which is mainly caused by the flood water from the upper reach of the Yangtze River. This is not the case, however, for floods mainly induced by flood water from four main rivers in the catchment. In view of this, a comprehensive strategy for flood management in Dongting Lake is required. Non-engineering measures, such as warning systems and combined operation of the TGD and other reservoirs in the catchment, as well as traditional engineering measures, should be further improved. Meanwhile, a sustainable philosophy for flood control, including natural flood management and lake restoration, is recommended to reduce the flood risk. 展开更多
关键词 three Gorges DAM FLOOD control water LEVEL HYDRODYNAMIC model Dongting LAKE
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Simulation of water temperature distribution in Fenhe Reservoir 被引量:1
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作者 Shu-fang FAN Min-quan FENG Zhao LIU 《Water Science and Engineering》 EI CAS 2009年第2期32-42,共11页
In order to evaluate the need of controlling the temperature of water discharged from the Fenhe Reservoir, the reservoir water temperature distribution was examined. A three-dimensional mathematical model was used to ... In order to evaluate the need of controlling the temperature of water discharged from the Fenhe Reservoir, the reservoir water temperature distribution was examined. A three-dimensional mathematical model was used to simulate the in-plane and vertical distribution of water temperature. The parameters of the model were calibrated with field data of the temperature distribution in the Fenhe Reservoir. The simulated temperature of discharged water is consistent with the measured data. The difference in temperature between the discharged water and the natural river channel is less than 3 ℃ under the current operating conditions. This will not significantly impact the environment of downstream areas. 展开更多
关键词 three-dimensional mathematical model reservoir water temperature watertemperature distribution water temperature simulation DISCHARGE Fenhe Reservoir
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Assessment of Water Provenances in Koxkar Glacier Region at the South Slope of Mt. Tianshan,China
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作者 Wang Jian Xu Junli +1 位作者 Han Haidong Xu Xiaohui 《Meteorological and Environmental Research》 CAS 2019年第5期81-86,92,共7页
Various water samples were collected for electrical conductivity (EC) and δ^18O analysis,and the proportion and contribution of atmospheric precipitation,glacier ice and shallow groundwater to discharge in the Koxkar... Various water samples were collected for electrical conductivity (EC) and δ^18O analysis,and the proportion and contribution of atmospheric precipitation,glacier ice and shallow groundwater to discharge in the Koxkar glacier basin at the south slope of the Tianshan Mountains were studied.The results show that glacial ice-water recharge was dominant,accounting for 72.11% of the annual runoff.It also had a significant positive correlation with temperature during the warm season (from May to September).However,glacier ice ablation replenishment still existed when the temperature in the cold season was below the critical temperature of 0 ℃.This could be that the heat generated by the friction between the ice body and the ice bed during the subglacial ice sliding process led ice to melt,what's more,the stored water in the geometric passages inside and below the glacier could slowly release.Groundwater recharge accounted for 16.38% of the total runoff.The supplement was small and its variation range was relatively small in the cold season.But in the warm season,the amount of groundwater recharge increased and changed drastically.It might be that the seasonal frozen soil in the basin was widely developed and was affected by temperature changes.Atmospheric precipitation replenishment only accounted for 11.51%.The daily precipitation recharge river water had a significant response to regional precipitation,but there was hysteresis in time,and there was still precipitation recharge runoff even in the absence of precipitation. 展开更多
关键词 water PROVENANCE Conductivity Δ^18O three-COMPONENT mixing models Koxkar glacier
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三维土工网边坡防护水土保持能力研究 被引量:1
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作者 李时亮 曾长贤 +3 位作者 王亚飞 李立 吴昊 郑烨炜 《铁道科学与工程学报》 EI CAS CSCD 北大核心 2024年第1期149-157,共9页
路基边坡防护工程可减轻降雨对坡面土体的侵蚀作用,为深入研究坡面防护材料水土保持能力的定量表征方法,通过室内人工降雨边坡侵蚀模型试验,分析不同降雨强度和不同三维土工网防护下路基边坡的降雨侵蚀规律,提出三维土工网水土保持能力... 路基边坡防护工程可减轻降雨对坡面土体的侵蚀作用,为深入研究坡面防护材料水土保持能力的定量表征方法,通过室内人工降雨边坡侵蚀模型试验,分析不同降雨强度和不同三维土工网防护下路基边坡的降雨侵蚀规律,提出三维土工网水土保持能力的试验测定方法及相关系数计算公式。研究结果表明:三维土工网防护边坡泥沙流失干质量明显小于相同条件下不设防边坡泥沙流失干质量,土工网防护在减少边坡侵蚀量的同时,有利于边坡侵蚀进程的快速稳定,但土工网的水土保持能力随雨强增大急剧下降。泥沙流失速度随着降雨的持续而逐渐减小,后期趋于收敛稳定,侵蚀历程采用指数函数拟合具有较好的相关性。建议设防边坡的试验降雨时间不少于70 min,不设防的边坡试验降雨时间不小于100 min。水土保持能力系数随雨强的增大呈对数函数关系减小,雨强超过100 mm/h时水土保持能力系数实测值与对数函数拟合值差异较大,建议在测定材料水土保持能力系数时雨强取20~100 mm/h,可取50 mm/h作为标准试验雨强。泡面类三维土工网水土保持能力显著优于普通三维土工网,而双泡面的三维土工网优于单泡面三维土工网。试验条件下凹凸泡面三维土工网的水土保持能力系数主要分布在1.71~3.03,建议50 mm/h雨强三维土工网水土保持能力系数不应小于1.5。 展开更多
关键词 降雨侵蚀 边坡防护 三维土工网 模型试验 水土保持能力系数
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侏罗系宝塔山砂岩突水风险预测及限制边界疏降技术
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作者 乔伟 吕玉广 +5 位作者 韩港 刘光尧 吕文斌 冯培超 陈维池 汪祯 《煤炭科学技术》 EI CAS CSCD 北大核心 2024年第2期194-208,共15页
内蒙古上海庙矿区新上海一号煤矿发生国内首次也是目前唯一的侏罗系煤层开采底板宝塔山砂岩突水淹井事故;开展了侏罗系煤层开采底板强富水宝塔山砂岩突水危险性评价方法和防控技术的研究工作。首先,明确了“11·25”事故的突水水源... 内蒙古上海庙矿区新上海一号煤矿发生国内首次也是目前唯一的侏罗系煤层开采底板宝塔山砂岩突水淹井事故;开展了侏罗系煤层开采底板强富水宝塔山砂岩突水危险性评价方法和防控技术的研究工作。首先,明确了“11·25”事故的突水水源为侏罗系延安组下部的宝塔山砂岩含水层,且煤层与底板宝塔山砂岩之间隔水层具有强度低、软化系数小、胶结性差的特点,属地质软岩。其次,以“含水层厚度、含水层富水性、含水层渗透性、含水层水压力及18煤底板隔水层有效厚度”为主要指标建立突水评价体系,将宝塔山砂岩含水层突水危险性分区被划分为安全区(32.21%)、威胁区(37.53%)及危险区(30.26%)三种类型,并通过实例验证了评价模型的准确性。最后,结合底板隔水层工程地质特性,分析采用“断层注浆形成局部限制边界+群孔疏降”的方法防控宝塔山砂岩突水。设定“疏放水开始至1号钻场退出疏放水工作、2号、3号和4号钻场持续进行疏放水工作至3号钻场退出、2号和4号钻场持续进行疏放水工作至模型补排平衡”的疏降方案。依据规范得出注浆后最大帷幕渗透系数为2×10^(-2) m/d,当断层注浆后帷幕渗透系数为2×10^(-2)~2×10^(-8) m/d时,疏放水量为402万~347.8万m^(3),安全区占矿区的比例为43.34%~67.37%。结合注浆成本、疏放水量和安全性,帷幕渗透系数为2×10^(-4) m/d时即可有效保证矿井安全生产和技术经济效益。断层注浆局部限制边界+疏放水联合技可有效防控宝塔山砂岩水害,研究工作对我国西部侏罗纪煤田开发底板水防治具有重要意义和工程实践价值。 展开更多
关键词 宝塔山砂岩 弱胶结隔水层 三维地下水模型 危险性评价 水害防治
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三江源水源涵养价值时空格局及影响因素 被引量:1
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作者 高向龙 冯起 +3 位作者 李宗省 邓晓红 薛健 张百婷 《生态学报》 CAS CSCD 北大核心 2024年第16期7074-7086,共13页
水源涵养作为三江源最重要的生态系统服务功能,是推动三江源生态环境保护和高质量发展的战略支撑。基于InVEST模型中的产水模块,结合影子工程法,分析三江源水源涵养价值的时空变化,并利用耦合度模型探究三江源水源涵养价值与其影响要素... 水源涵养作为三江源最重要的生态系统服务功能,是推动三江源生态环境保护和高质量发展的战略支撑。基于InVEST模型中的产水模块,结合影子工程法,分析三江源水源涵养价值的时空变化,并利用耦合度模型探究三江源水源涵养价值与其影响要素间的耦合关系。结果表明:(1)1981—2020年三江源的水源涵养价值呈整体上升趋势,平均值为1562.07亿元,呈东南多西北少的空间分布特征,各区域的单元水源涵养价值表现为:澜沧江源>黄河源>长江源。(2)降水量与水源涵养价值在各时段内均存在正相关性,2010年前,降水量与水源涵养价值的相关性显著,2010年后,相关性不显著,水源涵养价值对降水的响应降低。(3)林地和草地的单位水源涵养价值高于区域平均值,耕地、建设用地和未利用地的水源涵养单位水源涵养价值较低。林草地面积增加,未利用地面积减少,是三江源水源涵养价值上升的重要因素。(4)三江源人均水源涵养价值呈波动变化趋势,多年均值为25.02万元/人;三江源区域经济高速发展,GDP增速显著高于水源涵养价值增速,水源涵养价值与GDP的比值由15.48下降至2.89,水源涵养价值乘数显著下降,水源涵养稀缺性上升。(5)水源涵养价值与各要素间的耦合度由濒临失调转为初级耦合状态,相互作用逐渐变强。随着未来气候变化的不确定性增加,尤其是气温升高,会成为限制三江源水源涵养价值的主要因素;推动未利用地转化为生态地类,将促进区域生态环境质量稳固提升。此外,三江源区应以保护自然资源和生态环境为主,改变过去以畜牧业为主的生产方式,拓展多产业共同发展。 展开更多
关键词 三江源 水源涵养价值 InVEST模型 驱动因素 耦合度
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2007—2020年黄河流域农业灌溉用水效率——基于3阶段DEA模型和Malmquist指数 被引量:1
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作者 焦雨萌 曹建军 +2 位作者 陈洁 王海茹 李育梅 《中国水土保持科学》 CSCD 北大核心 2024年第1期70-76,共7页
为使黄河流域农业灌溉水资源得到合理利用,采用3阶段DEA模型和Malmquist指数方法,分析2007—2020年黄河流域各省区在剔除外部环境影响因素下的实际农业灌溉用水效率。结果表明:1)黄河流域农业灌溉用水效率低下主要受制于经济水平和水资... 为使黄河流域农业灌溉水资源得到合理利用,采用3阶段DEA模型和Malmquist指数方法,分析2007—2020年黄河流域各省区在剔除外部环境影响因素下的实际农业灌溉用水效率。结果表明:1)黄河流域农业灌溉用水效率低下主要受制于经济水平和水资源禀赋,尽管政府的重视对其效率具有一定的促进作用,但效果不显著。2)在消除外部影响因素后,2007—2020年黄河流域灌溉用水的纯技术效率平均值被低估(0.931),综合技术效率平均值(0.733)和规模效率平均值(0.792)被高估。在省域尺度上,除河南省农业灌溉用水效率位于有效前沿面外,其余省区的农业灌溉用水投入均未得到有效利用。3)通过Malmquist指数分析发现,2007—2020年黄河流域农业灌溉用水效率整体呈波动上升趋势,平均增长率为10.3%。其中,技术进步变化>1,规模效率变化与Mamquist指数变化趋势相似。综上,黄河流域应在灌溉技术水平较高的基础上高度重视农业灌溉用水中规模效率的潜力,以进一步提升灌溉用水效率。 展开更多
关键词 农业灌溉用水效率 3阶段DEA模型 Malmqusit指数 黄河流域
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长江中下游平原河网地区畅流活水方案研究 被引量:2
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作者 曹伟岳 王正飞 朱海清 《水资源开发与管理》 2024年第1期39-44,21,共7页
新时期下水环境治理从单一的水环境污染治理转向“三水统筹”,本文以常熟市城区为研究对象,通过河网水动力数学模型对全城活水、分区活水和局部强化活水三大类型的畅流活水方案进行了模拟研究。结果表明,周期性开闭闸门、自流引清、有... 新时期下水环境治理从单一的水环境污染治理转向“三水统筹”,本文以常熟市城区为研究对象,通过河网水动力数学模型对全城活水、分区活水和局部强化活水三大类型的畅流活水方案进行了模拟研究。结果表明,周期性开闭闸门、自流引清、有序冲排的方法能有效增强河流水体流动性,为改善城区水环境质量提供保障,并为其他长江中下游平原河网地区实现“三水统筹”提供了新思路。 展开更多
关键词 三水统筹 河网模型 畅流活水
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Chlorophyll-a retrieval in inland waters based on a regional three-band model 被引量:1
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作者 LIFang XUJingping +1 位作者 MARonghua ZHANGBai 《遥感学报》 CSCD 北大核心 2011年第6期1156-1170,共15页
以太湖和石头口门水库为例,建立了一种可直接计算水体叶绿素a浓度的区域化三波段模型。该模型通过对研究水体的光学特性分析,明确三波段组合与叶绿素a浓度间的函数关系参数,不仅可较好指示研究水体叶绿素a浓度水平,而且大大减小了回归... 以太湖和石头口门水库为例,建立了一种可直接计算水体叶绿素a浓度的区域化三波段模型。该模型通过对研究水体的光学特性分析,明确三波段组合与叶绿素a浓度间的函数关系参数,不仅可较好指示研究水体叶绿素a浓度水平,而且大大减小了回归算法所带来的模型不确定性。利用高精度、长时间序列的水体光学特性观测数据,建立针对不同研究水体的区域化三波段模型可为实现内陆水体叶绿素a浓度遥感监测业务化运行提供方法借鉴。 展开更多
关键词 遥感技术 应用 理论 材料
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高桩码头桩群对水动力参数影响的数值模拟
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作者 薛玉娆 张金凤 +2 位作者 张庆河 尤再进 季则舟 《水利水运工程学报》 CSCD 北大核心 2024年第5期95-102,共8页
桩基码头是常用的码头结构形式,应用广泛。高桩码头桩群基础改变了周围水动力场,引起泥沙冲淤规律的变化,从而对码头结构稳定性产生影响,研究圆柱桩群阻力特性,对水流和底床冲淤变化研究具有重要意义。基于FVCOM的三维水动力模型,将桩... 桩基码头是常用的码头结构形式,应用广泛。高桩码头桩群基础改变了周围水动力场,引起泥沙冲淤规律的变化,从而对码头结构稳定性产生影响,研究圆柱桩群阻力特性,对水流和底床冲淤变化研究具有重要意义。基于FVCOM的三维水动力模型,将桩柱绕流阻力等效为水流阻力,提出一种桩群阻水效果的概化方法,通过增加桩群阻力项来研究桩群对水动力环境参数的影响,构建了群桩下方和后方水动力规律的三维水动力改进模型。该模型应用于舟山某高桩码头附近流场的模拟计算,结果与实测值吻合良好,证明了模型的有效性;计算结果表明,桩群影响使得码头后方的流速减小,比码头前方减小约67%。所构建的模型可进一步研究高桩码头下方和后方冲淤演变规律,为码头建设和运维提供技术支撑。 展开更多
关键词 水流阻力 桩群概化 FVCOM三维模型 水动力 高桩码头
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THREE-DIMENSIONAL MODELLING OF HYDRODYNAMICS AND WATER QUALITY IN COASTAL WATERS 被引量:2
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作者 Shen Yong-ming(Department of Civil Engineering, Dalian University of Technology, Dalian 116023,P.R.China)Darryl G Murphy(Environmental Studies, Hydraulics Research Wallingford Ltd, Wallingford,Oxfordshire, OX10 8BA,U.K.) ) 《Journal of Hydrodynamics》 SCIE EI CSCD 1995年第3期13-21,共9页
Dalian Bay is a large coastal embayment situated in the Yellow Sea. The bay is heavily industrialised and the surrounding water they receives large amounts of industrial effluent. A numerical model of water quality in... Dalian Bay is a large coastal embayment situated in the Yellow Sea. The bay is heavily industrialised and the surrounding water they receives large amounts of industrial effluent. A numerical model of water quality in Dalian Bay has been developed to study the long-term transport and fate of pollutants in the system. In order to model the water quality of an estuary or coastal area many interdependent processes need to be simulated. These may be conveniently separated into three main groups: transport and mixing processes, biochemical interaction of water quality variables and the utilization and re-cycling of nutrients by living matter.The waters of Dalisn Bay are stratified due to the density variations resulting from the seasonal variations in meteorological conditions. In order to simulate the vertical structure of the hydrodynamics and pollutant transport in the bay the three-dimensional segmented and layered hydrodynamic model has been utilised. The results are used to drive the water quality model which simulates full oxygen and nutrient balance, primary productivity and the transport,reaction mechanism and fate of pollutants. The model has been used to study seasonal effects.The model has been calibrated against a limited data set of historical water quality observations and in general demonstrates excellent agreement with all available data. 展开更多
关键词 three-DIMENSION tide averaged model water quality ECOSYSTEM coastal waters
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THREE DIMENSIONAL NONLINEAR NUMERICAL MODEL WITH INCLINED PRESSURE FOR SALTWATER INTRUSION AT THE YANGTZE RIVER ESTUARY 被引量:10
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作者 Zhu, Yuliang Zheng, Jinhai +1 位作者 Mao, Lihua Yan, Yixin 《Journal of Hydrodynamics》 SCIE EI CSCD 2000年第1期57-66,共10页
A three-dimensional nonlinear numerical model with inclined pressure was developed to compute the saltwater intrusion at the Yangtze River Estuary. The σ-transformation was introduced in the vertical plane to achieve... A three-dimensional nonlinear numerical model with inclined pressure was developed to compute the saltwater intrusion at the Yangtze River Estuary. The σ-transformation was introduced in the vertical plane to achieve the same lattices in the whole domain of interest. The mode-splitting technique can be used to split the three-dimensional governing equations into the surface gravity waves (external mode) and the internal gravity waves (internal mode). And the external mode was solved by the improved double-sweep-implicit (DSI) finite difference method and the internal mode was solved by the Eulerian-Lagrangian method. The Eulerian-Lagrangian method can not only reduce the numerical diffusion but also increase the computational accuracy through the improvement of the finite difference scheme in the vertical direction. The application of the model to the Yangtze River Estuary was carried out for the calculation of the saltwater intrusion and the null point. Results of the temporal and spatial distribution of the flow velocity and the salinity coincide with the measured data quite well. The formation and location of the underwater sandbars in the North Channel of the Yangtze River Estuary are closely related to the local salinity, the null point, the predominant current and the residual flow. 展开更多
关键词 Flow of water Mathematical models Percolation (fluids) Seawater three dimensional
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Three-phase Fluid Numerical Simulation and Water Modeling Experiment of Supersonic Oxygen Jet Impingement on Molten Bath in EAF 被引量:2
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作者 Shao-chun CHEN Rong ZHU +2 位作者 Jing-she LI Chun-lai HE Ming Lü 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2014年第6期589-595,共7页
By means of the computational fluid dynamics software Fluent 6.3, a mathematical model of three-dimensional three-phase fluid flow field in the molten bath of electric arc furnace (EAF) with side accessorial oxygen ... By means of the computational fluid dynamics software Fluent 6.3, a mathematical model of three-dimensional three-phase fluid flow field in the molten bath of electric arc furnace (EAF) with side accessorial oxygen lances was developed to study the transient phenomena of oxygen jet impingement on the molten steel and the molten slag. The water modeling experiment was carried out to verify the simulation results. The impingement of the supersonic oxygen jet caused impact dent on the molten steel surface accordingly. The area of impact dent changed almost in linear relationship to flow rate of oxygen jet, which can be expressed by a deduced mathematical equation. And the relationship between the impact force of oxygen iet and the correspondingly formed apparent static pressure on molten bath was obtained, which was in linear relationship and a direct proportion, and can also be expressed by a deduced mathematical equation. 展开更多
关键词 electric arc furnace oxygen jet three-phase fluid numerical simulation water modeling experiment
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