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However, this does not disprove that short changes in intensity or direction of the Kuroshio ever occurred at certain short cooling events. The 10Be minimum during the Younger Dryas event may indicate that the Kuroshio had been once greatly weakened or even terminated in the Okinawa Trough area which could be related to the response of the Pacific Ocean to the Younger Dryas. The 10Be and 9Be in surface sediment show totally different distribution patterns. The 10Be distribution is dominated by the input from Kuroshio and its branch, the Yellow Sea Current, whereas 9Be is mainly influenced by terrestrial input of suspended materials from the Yellow River discharge and deposited in the fine-grain size sediment zone southwest of the island of Jeju. Both 10Be and 9Be distribution patterns are different from anthropogenic pollutants such as heavy metal Pb which is dominantly distributed closely to the coastal areas.

冰期时冲绳海槽北部10Be的沉积通量远远高于太平洋大洋海区,充分反映了黑潮的传送带作用和边缘海的聚焦沉积作用,并表明末次冰期时在千年尺度上黑潮仍流经冲绳海槽,且强度并未减弱。10Be的通量在新仙女木时降到整个岩芯所跨时期的最低点,甚至低于10Be的现代大气平均生产率,因此推测在新仙女木事件时,黑潮的变动特别大,有可能改向或断流。

After the variation of flow and sediment, the epeirogenic area of seacoast reduces greatly because the decrease of the incoming flow and sediment.

采用实测资料分析和理论探讨的方法,研究了黄河口海岸造陆与水沙过程变异的关系。

Negative Ce anomaly is one of diagnostic criteria of geotectonic setting of silicalite. Silicalite in Golug, Xinrenlang and Lhazê in the Gangdisê tectonic belt is characterized by unclear negative Ce anomaly characteristic of epicontinental or neritic sediment, while silicalite in Gyüzê La-Jiaqing area is characterized by weak negative Ce anomaly characteristic of sediment in transitional belt between oceanic basin and continental margin.

硅质岩Ce异常特征是构造背景判别的最有效的手段之一,冈底斯构造带谷露、新认朗与拉孜地区的硅质岩Ce负异常不明显,属大陆边缘或浅海环境,而九子拉家青地区的硅质岩具弱的Ce负异常,属大洋盆地与大陆边缘之间的过渡环境中的沉积。

The PAHs in sediment core were mainly composed of phenanthrene and fluorene. The concentrations of phenanthrene and fluorene in sediment core were 236.1-417.9 ng/g and 91-130.8 ng/g,respectively. Both of them accounted for 47.2%-58.1% of the ∑PAH16 in sediments.

沉积物中多环芳烃的组成以3环的菲和芴为主,它们的含量分别为236.1~417.9 ng/g和91~130.8 ng/g,二者共占沉积物中多环芳烃总量(∑PAH16)的47.2%~58.1%。

Fourteen sediment samples with different content of Fe〓O〓 were collected from lower reach of the Liao River in China. The photodegradation of γ-hexachlorocyclohexane on the sediment surfaces was investigated to observe the effects of Fe〓O〓 and other photoinducable substances, such as TiO〓 and organic substances, on photodegradation of γ-HCH.

从辽河新民段采集了14种具有不同含量的Fe〓O〓的天然沉积物,为了探讨沉积物中Fe〓O〓和其它具有光诱导和光催化能力的物质如TiO〓和有机质成分对沉积物表面上的林丹的光解的影响,研究了γ-HCH在这些沉积物表面上的光解动力学。

The daily observed data of surface suspended sediment concentration at the Nanhui headland from May 2002 to October 2005, the observed data of tidal range, tidal level, wind speed and direction at the Nanhui hydrometeorological station and the water and sediment discharge data observed at Datong hydrographic station in the same period were used to study the periodicity and affecting mechanism of SSC variation.

根据2002年5月至2005年10月在杭州湾北岸和长江口口门交汇处一固定观测点表层每日取样的悬沙浓度资料和同期的潮差、潮位、风向风速以及长江大通水文站的水沙资料,利用Spss、MatLab分析软件,采用小波分析和相关性分析方法,探讨了悬沙浓度变化的周期性及其影响机制。

It collects the data of sediment discharge and runoff depth of key hydrometric stations of the Yellow River and its main tributaries in the last 50 years and studies the normal variation of absolute value of sediment discharge and relative runoff depth by using mathematical statistics.

收集了黄河重要干流水文站和一些主要支流近50年的输沙量及径流量数据,应用数理统计方法研究了输沙量绝对值和相对径流量的多年变化情况。

Taking the sediment discharge of the Lijin Hydrometric Station as input, increment of area and migration of shoreline of the present subdelta as output, by using the model of linear control system which is individual input and individual output, the author built the dynamic prediction model on the development and evolution of the present subdelta, and then predicted its development and evolution, and analyzed the influences of sediment discharge of the river on its development and evolution.

首先,以黄河利津站的来沙量为输入、现行黄河亚三角洲的面积和岸线增长为输出,采用单输入、单输出的线性控制系统模型建立了现行黄河亚三角洲发育演变的动态预测模型;然后,利用该模型对现行黄河亚三角洲的发育演变进行了预测,并据此分析了黄河来沙量对黄河亚三角洲的发育演变影响。

The important parameter of water-sediment regulation is the threshold of grouping sediment concentration about floods scouring and silting relative balance in hyperconcentration river.

河床冲淤相对平衡下的洪水分组含沙量阈值是多泥沙河流水沙调控的重要参数。

An evaluation of Linear, Freundlich and Langmuir equations on both accuratity and stability indicates that the Linear equation is the best. Sorption of p nitrophenol to sediment is dominated by the partition of solutes to sedimental organic matter. The influences of temperature on sorption of p nitrophenol to sediment was also investigated. The sorption parameters of thermodynamics,Δ H =-7 8?kJ·mol -1 , suggest that the sorption behavior is dominated by dispersive force.

研究了对硝基苯酚在不同沉积物上的吸附等温线,比较分析了Linear方程、Freundlich方程和Langmuir方程描述吸附等温线的准确性和稳定性结果表明,Iinear方程更适合描述沉积物吸附对硝基苯酚的等温线对硝基苯酚在沉积物上的吸附主要是溶质在沉积物有机质中的分配,其吸附热为-7 8 kJ·mol-1,主要的吸附作用力为疏水键力。

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