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Chinese Science Bulletin 2003年第24期48卷 2754-2758页

作者： zhu jianrong state key laboratory of estuarine and coastal research, East {1. normal university, shanghai 200062, china correspondence should be addressed to zhu jianrong (e-mail: jrzhu@ ***) state {1. laboratory of estuarine and coastal research East China Normal University Shanghai

Based on the analysis of the field observation data off the Changjiang mouth in August 2000 and satellite image of sea surface temperature (SST) in summer of 1.97, it indicates that there exists the upwelling event on the west side of the submerged river valley (SRV) off the Changjiang mouth. The calculated results of the three-dimensional nu-merical model show that this upwelling is induced by the barotropic effect, baroclinic effect, bottom Ekman effect and their interaction with the slope bottom topography. The baroclinic effect is the main cause producing the upwelling at the northern SRV (on the east side of the South Passage of the Changjiang estuary), while the barotropic effect is the main cause at the southern SRV (on the east side of the cen-ter of the Hangzhou Bay mouth). The dynamic mechanism producing the upwelling off the Changjiang mouth is differ-ent with the general one along coast and on the continental shelf.

关键词：动力学机制长江口夏季上升流数字仿真

Numerical study on residual current and its impact on mass transport in the Hangzhou Bay and the Changjiang Estuary Ⅱ. Residual current and its impact on mass transport in winter

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Acta Oceanologica Sinica 2001年第1期20卷 153-170页

作者： zhu Shouxian, Dang Pingxing, Shi Fengyan, zhu jianrong ( state key laboratory of estuarine and coastal research, East china normal university, shanghai 200062, china Meteorology Institute of the PLA Science and Engineering university, Nanjing 211101, Ch state {1. Lab. estuarine Coast. Res. East China Normal University Shanghai 200062 China Meteorology Institute PLA Sci. and Engineering University Nanjing 211101 China

Some observational characteristics of residual current and mass transport in the Hangzhou Bay and the Changjiang Estuary in winter are analyzed. The residual current and its impact on mass transport are simulated with a 3 - D joint model for the Hangzhou Bay and the Changjiang Estuary, in which the impacts of river flux, wind, baroclinic pressure gradient (BPG), background current in the East china Sea and tide (including M2, S2, K1.and O1. are taken into account. Based on there studies, further simulations are made to analyze the dynamical mechanisms of the observational characteristics.

关键词： The Hangzhou Bay the Changjing Estuary residual current mass transport numerical study winter

FLUSHING TIME OF THE YANGTZE ESTUARY BY DISCHARGE: A MODEL STUDY

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Journal of Hydrodynamics 2003年第3期15卷 63-71页

作者： QiDing-man ShenHuan-ting, zhuJian-rong ScientificresearchInstituteoftheMinistryofCommunication EstuarineandCoastalResearchCenterShanghai201201China state{1.laboratoryofestuarineandcoastalresearch EastChinaNormalUniversityShanghai200062China

Flushing time of the Yangtze estuary by discharge is one of the importantfactors responsible for the transport of pollutants from various sources located along the Yangtzeestuary: Therefore, an objective of the present stud-y, which analysis flushing time in the case ofdifferent discharge is very helpful to evaluate the water environmental of the Yangtze *** a dissolved conservative material as a tracer in the water, a three-dimensionadvection-diffusion water exchange numerical model was used to study the flushing time by dischargeand the discharge dominated region of the Yangtze estuary. The initial tracer concentration is setto 0.0 in the numerical domain of the Yangtze estuary, and the concentration value is set to 1. 0 onthe inflow boundary. The tracer flux normal to the solid boundary is set to 0. 0. The flushing timeand the out limit of discharge dominated region can be calculated in terms of the tracerconcentration. {1., coastal and Ocean Model (ECOM) is used as the hydro-dynamic model. Theresult shows that the flushing time is approximately in inverse proportion to the discharge at theupper stream. The out limit is farther from the upper inflow boundary as discharge increases. Theout limit at the north branch is different from that of the south branch because the discharge intothe north branch is much less than that into the south branch. The data is qualitative similar tothe observed data, which show the three-dimensional advection-diffusion equation can be used toestimate the flushing time and the discharge dominated region of the Yangtze estuary.

关键词： ECOM flushing time discharge dominated region

长江流域梯级水库夏末秋初蓄水对河口盐水入侵和淡水资源的影响

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华东师范大学学报（自然科学版） 2024年第1期 90-103页

作者：金智朱建荣仇威华东师范大学河口海岸学国家重点实验室上海200241 上海水环境模拟与水生态修复工程技术研究中心上海200233

流域大型梯级水库群,夏末秋初蓄水,来年枯季放水,季节性改变了入海径流量,会影响河口盐水入侵和淡水资源利用.收集了长江流域大型梯级水库有效库容和南水北调工程跨流域调水的量值,利用改进的河口海岸三维数值模式ECOM-si,模拟和分析了... 详细信息

流域大型梯级水库群,夏末秋初蓄水,来年枯季放水,季节性改变了入海径流量,会影响河口盐水入侵和淡水资源利用.收集了长江流域大型梯级水库有效库容和南水北调工程跨流域调水的量值,利用改进的河口海岸三维数值模式ECOM-si,模拟和分析了长江流域重大工程对河口盐水入侵和淡水资源的影响.截至2020年和2035年,长江流域中上游已建和将建大型水库有效库容分别为706.1.和943.88亿m^(3),蓄水期9、1.月间平均径流量分别减少1.398和1.909 m^(3)/s.基于大通实测水文站1.50—2020年实测月平均径流量,考虑截至2020年和2035年流域重大工程对径流量的调节,给出了平均水文年和特枯水文年8—1.月的月平均径流量.数值模拟结果表明,截至2020年和2035年流域梯级水库9—1.月蓄水,径流量下降,导致盐水入侵加剧.在平均水文年,南支水源地4个水库9—1.月所有时间均能取到淡水.在特枯水文年,9—1.月东风西沙、太仓、陈行和青草沙水库取水口连续不宜取水天数截至2020年分别为28.75、24.99、29.63和37.47 d,到2035年分别为46.53、44.1.、47.56和50.75 d.夏末秋初特枯和平均水文年情况下流域水库蓄水期间遇到强北风作用,均会显著影响长江口水源地取水.对于特枯水文年,流域水库群应减少蓄水量,甚至应该放水,以保障长江口淡水资源的安全.

关键词：流域水库群径流量长江河口盐水入侵数值模拟

维普期刊数据库博看期刊

Distribution of chlorophyll-a off the Changjiang River and its dynamic cause interpretation

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Science china Earth Sciences 2005年第7期48卷 950-956页

作者： zhu {1. state {1. laboratory of estuarine and coastal research East China Normal University Shanghai 200062 China

An interdisciplinary comprehensive survey was conducted in August 2000 with the modern measurement instruments off the Changjiang River. The analysis of the observation data shows that there exist two sources of phytoplankton blooms off the Changjiang River. The one with wider spatial extent and stronger intensity appears in the surface plume due to photosyn- thesis produced by the eutrophication brought by a huge amount of nutrient load via the Chang- jiang River and well light penetration because of lower turbidity seawater. Photosynthesis pro- duces chlorophyll-a (Chl-a), meanwhile releases oxygen and absorbs carbon dioxide, so the high Chl-a concentration distribution corresponds to the distribution of high dissolved oxygen and pH. The other with smaller spatial extent and weaker intensity exists in the thermocline in the Taiwan Warm Current (TWC), but the high Chl-a concentration does not correspond to the high dissolved oxygen and pH, which may be a result of long distance advection by the TWC. The eutrophica- tion associated with the huge amount of nutrient flowing into the sea via the Changjiang River is the main cause of the red tide bloom in the area off the Changjiang River, the red tide that oc- curred along the Fujian and Zhejiang coast can influence the area off the Changjiang River pos- sibly via the TWC. The distributions of current simulated by a three-dimension numerical model support the above conclusion.

关键词： area off the Changjiang River field survey red tide eutrophication Taiwan Warm Current.

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黄海、东海夏季环流的数值模拟

海洋学报 2002年第S1期24卷 123-133页

作者：朱建荣丁平兴朱首贤华东师范大学河口海岸国家重点实验室上海200062

基于ECOM -si,建立了一个垂向取σ坐标、水平取球面坐标的三维高分辨率湍流闭合的黄海、东海海洋环流数值模式 .考虑实际岸线和水深、边界通量、密度梯度力和风应力 ,应用该模式较成功地模拟出了夏季黄海、东海环流 (黑潮、台湾暖流、... 详细信息

基于ECOM -si,建立了一个垂向取σ坐标、水平取球面坐标的三维高分辨率湍流闭合的黄海、东海海洋环流数值模式 .考虑实际岸线和水深、边界通量、密度梯度力和风应力 ,应用该模式较成功地模拟出了夏季黄海、东海环流 (黑潮、台湾暖流、对马暖流、黄海冷水团环流和沿岸流 ) ,摸拟结果与以往实际观测和研究结果较为一致。

关键词：黄海、东海数值模式海洋环流数值模拟

DRY-SEASON VARIABILITY IN SUSPENDED SEDIMENT CONCENTRATIONS IN THE SOUTH PASSAGE OF THE CHANGJIANG ESTUARY

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International Journal of Sediment research 2007年第3期22卷 199-207页

作者： Wenxiang ZHANG1. Shilun YANG2, Jun zhu3, Shiliang GONG4, and Pingxing DING2 1.Dr., Instructor, 2 Dr., Prof., 4 Ph.D. Candidate, {1. key Lab of estuarine & coastal research, East china normal university, Zhongshan N. Rd., 3663, shanghai 200062, china. 3 Ph.D. Candidate, Department of Environmental, coastal and Ocean Science, university of Massachusetts, Boston, MA 021.5-3393, USA E china {1. Univ State Key Lab Estuarine & Coastal Res Shanghai 200062 Peoples R China Univ Massachusetts Dept Environm Coastal & Ocean Sci Boston MA 02125 USA

This paper reports the results of continuous monitoring of turbidity, water depth, salinity (using an Optical Backscatter Sensor (OBS)), and current velocity (using a Current meter (SLC9-2)) in the South Passage of the Changjiang Estuary over a spring–neap period in February 2003 (dry season). The turbidity measured via OBS was closely correlated with the suspended sediment concentration (SSC), which was highly variable. Over the study period, the SSC in the middle layer ranged from 1.0 to 1.00 mg/l. The minimum SSC occurred during a late ebb tide, and the maximum SSC occurred during a late flood tide. On average, the SSC was 1.5 times higher during flood tide than during ebb tide. Vertically within the water column, SSC increased downward, with the ratio of SSC measured near the bed to that measured at the surface ranging from 1.90 to 1..3. The temporal variability in SSC is jointly governed by tides and wind-induced waves, whereas the vertical variability in SSC is attributed to the effect of gravity and vertical water circulation.

关键词： Suspended sediment concentration (SSC) Optical Backscatter Sensor (OBS) Sediment dynamics Changjiang Estuary

Reducing eutrophication risk of a reservoir by water replacement： a case study of the Qingcaosha reservoir in the Changjiang Estuary

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Acta Oceanologica Sinica 2018年第6期37卷 23-29页

作者： CHEN Yizhong zhu {1. state {1. laboratory of estuarine and coastal research East China Normal University Shanghai 200062 China shanghai Academy of Environmental Sciences Shanghai 200233 China

Eutrophication of freshwater systems in cities is a major concern worldwide. Physical, biological and chemical methods have been used in eutrophic lakes and reservoirs to reduce their eutrophic state and algal biomass, but these approaches are not effective without a substantial reduction in nutrients input, which could take decades to achieve in the developing countries. This study aims to assess the risk of eutrophication and algal bloom in a {1. reservoir with high nutrient inputs to confirm the feasibility of inhibiting the reservoir＇s eutrophic state by hydrodynamic operations. A variety of water quality indexes（e.g., water temperature, secchi depth, dissolved oxygen, total nitrogen, total phosphorus, phytoplankton chlorophyll a） at five observed sites were investigated in the Qingcaosha reservoir, which located in the Changjiang Estuary, during the construction, trial and normal operation periods from 2009 to 201.. No water exchange happened during the construction from April 2009 to October 201., and the water exchange increased during the trial from October 201. to January 201., and during normal operation period from January 201.. The comprehensive nutrition state index（TLI） calculated by several representative water quality indexes was adopted to evaluate the variation of the trophic state in the reservoir. The peak values of TLI reached 51.in the summer of 2009, and 55 in the summer of 201., higher than the eutrophication threshold value 50. The lowest TLI, about 32, appeared in the summer of 201.. The values of TLI in other observation periods could keep under 50. The results showed that the reservoir could easily deteriorate into the eutrophic state because of excess nutrients and algal blooms in the summer of 2009 and 201., while the eutrophication and algal blooms could be reduced by the lack of nutrients in 201. or adequate water replacement in 201.. The temporal and spatial variations of water quality indexes were presented based on observation

关键词： estuarine reservoir eutrophic state algal bloom operation way

Impacts of wind stress on saltwater intrusion in the Yangtze Estuary

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Science china Earth Sciences 2012年第7期55卷 1178-1192页

作者： LI Lu zhu {1. WU Hui state {1. laboratory of estuarine and coastal research East China Normal UniversityShanghai 200062China

The observation at the Chongxi gauging station indicated the salinity of saltwater spilling over from the North Branch to the South Branch increased abnormally from November 1. to 1. in 2009 (during neap tide) and from February 1. to 1. in 201. (during moderate tide).We found for the first time that the strong northerly wind was responsible for the above abnormal salinity *** studies indicated that the saltwater intrusion in the Yangtze Estuary is influenced mainly by the river discharge,the tide,and the wind stress,but the impacts of variations of wind speed and direction on it have not been *** this study the impacts of wind stress on the saltwater intrusion were numerically simulated and the associated mechanisms were *** model results were consistent with the observed data obtained at six gauging stations during February and March in 2007 and four gauging stations in March 2008,and the abnormal salinity risings were well ***,if the wind speed is reduced by half,the salinity there will be significantly *** by the monthly mean river discharge of 1.000 m 3 /s and northerly wind of 5 m/s from January to February,the model simulated the temporal and spatial variation of saltwater *** wind-driven circulation,as well as the net water and salt fluxes from the North Branch into the South Branch,was calculated and analyzed in the cases of different wind speeds and *** results indicated that the intensity of the saltwater intrusion in the Yangtze Estuary is significantly influenced by the wind speeds and directions.

关键词： Yangtze Estuary saltwater intrusion wind-driven circulation salt flux numerical simulation

Impact of the eastern water diversion from the south to the north project on the saltwater intrusion in the Changjiang Estuary in china

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Acta Oceanologica Sinica 2012年第3期31卷 47-58页

作者： XU Kun zhu {1. GU Yuliang state {1. laboratory of estuarine and coastal research East China Normal UniversityShanghai 200062China state Engineering {1. Center(South)of Urban Water Resources Development and Utilization Shanghai 200082China

The south to the north project (WDP) on the saltwater intrusion in the Changjiang Estuary is studied by the improved three-dimensionai (3D) numerical *** net unit width flux in the Changjiang Estuary as well as the sectional salt flux is calculated in the North Branch (NB),the South Branch (SB),the North Channel (NC),the South Channel (SC),the North Passage (NP) and the South Passage (SP),*** net seaward water flux in the SB is reduced,and the net water flux spilling over from the NB to the SB is enhanced after the eastern *** the mean river discharge condition in the dry season,the net salt flux spilling over from the NB to the SB is increased by 2.09 t/s and 0.52 t/s during the spring and neap tides,respectively,due to the eastern *** saltwater intrusion in the Changjiang Estuary is enhanced by the eastern *** with that during the spring tide,the net water diversion ratio during the neap tide in the NC is smaller,and thus the enhancement of the saltwater intrusion by the eastern WDP is smaller in the NC,and larger in the NP and the *** tidally averaged surface salinity at the water intakes of the Dongfengxisha Reservoir,the Chenhang Reservoir and the Qingcaosha Reservoir rises both during the spring and neap tides.

关键词： eastern water diversion from the south to the north project saltwater intrusion Changjiang Estuary numerical calculation the water resource