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河口类型
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  “河口类型”译为未确定词的双语例句
     Several kinds of methods of the delimitation of demarcation lines in river estuary areas are proposed and analysed after the analysis of the types and characteristics of main Chinese river estuaries.
     特别在分析我国入海河流河口类型和特点的基础上,探讨了依据自然因素、社会因素和特征现象等来确定河口海岸线的几种方法。
短句来源
     Comparing with the Yangtse Estuary and the Huanghe Estuary, the contents of Al and Fe are higher, but the contents of Ca and P are lower in the Pearl River Estuary, indicating that climates, geologic backgrounds and types of estuaries influence the contents of major elements in estuarine sediments.
     与长江口和黄河口相比,珠江口沉积物Al、Fe等元素质量分数高,Ca、P等元素质量分数低,反映了"气候控制效应"、区域地质背景和河口类型对沉积物主元素质量分数的影响.
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  相似匹配句对
     Types of Artificial Satellites
     人造卫星的类型
短句来源
     TYPE OBJECTS
     类型对象
短句来源
     The study of hydrodynamic characteristics of flood and ebb channels and channel type judgment
     河口涨落潮槽水动力特征及河槽类型判定
短句来源
     debouch bar is its main and better reservoir type.
     河口砂坝砂体是其主要和良好的储层类型.
短句来源
     An Embouchure Retaining the Concernment
     粘住思念的河口
短句来源
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  estuarine classification
This study establishes an estuarine classification system based on the dominant hydraulic forcing.
      


There are distinct differences between rivers entering the Yellow Sea on its east coast and that on the west coast. Relative to rivers on the east coast (Korea), rivers on the west coast (China) have large water discharges and large sediment loads, but small tidal ranges. Because of these factors, the estuaries on the west side have reached a much more advanced stage of evolution, and have low filtering efficiencies. Chinese rivers make much greater contributions of sediment to the Yellow Sea than do the Korean...

There are distinct differences between rivers entering the Yellow Sea on its east coast and that on the west coast. Relative to rivers on the east coast (Korea), rivers on the west coast (China) have large water discharges and large sediment loads, but small tidal ranges. Because of these factors, the estuaries on the west side have reached a much more advanced stage of evolution, and have low filtering efficiencies. Chinese rivers make much greater contributions of sediment to the Yellow Sea than do the Korean rivers. The southward shifting of the Chang-Jiang River Estuary, and the northward shifting of the Huanghe River Estuary into Bohai Sea since 1855, have resulted in a net reduction of sediment input to the Yellow Sea.

本文通过对黄海沿岸几个主要河口的水文、泥沙和沉积特性的综合研究表明,黄海两岸河口的来水来沙条件和海洋动力条件有显著差异,使两岸的河口处在不同发育阶段,从而形成了不同的河口类型和对黄海沉积作用的不同贡献。长江河口的南移、黄河口的北徙以及一些河口建闸,改变了黄海沉积物冲淤分布的格局,也导致了黄海沉积速率的减缓。

1. The estuary can generally be divided into three sections. (1) Near mouth section: Its upper boundary is the tidal influence limit in the flood season, and the lower boundary is the limit between fresh water and brackish water (with salinity 0 1‰) in the dry season. This section is controlled by the fresh water and not influenced by diluted water (or mixed water) going upstream, which represents the runoff predominance. (2) River mouth section: Its upper boundary is the limit between the fresh...

1. The estuary can generally be divided into three sections. (1) Near mouth section: Its upper boundary is the tidal influence limit in the flood season, and the lower boundary is the limit between fresh water and brackish water (with salinity 0 1‰) in the dry season. This section is controlled by the fresh water and not influenced by diluted water (or mixed water) going upstream, which represents the runoff predominance. (2) River mouth section: Its upper boundary is the limit between the fresh water and brakish water in the dry season, and the lower boundary is at the place where there is the salt water with salinity about 30‰ in the bottom layer during flood season. It is the intruding front of the salt water (or continental water) during flood season where exists mixing and interaction of salt and fresh waters, with reciprocal tidal current. (3) Mouth outside seashore: Its bottom layer is controlled by salt water or continental water, and surface layer is covered by the diluted water (or mixed water), where the movement of tidal current is characterized by the rotation. 2. Accoding to the relative intensity of the influences of the river, tide or wave, the estuaries can be divided into three basic classes: river dominated, tide dominated and wave dominated. Their chief characteristics of dynamics, sedmentations and geomorphologies are also discussed in this paper. 3. The function of estuarine system can possibly be accommodated and satisfied by the input, transfer and output of informations and energies from river and sea, which is activated by continuous adjustment of the system′s elements, such as density ( ρ ), depth of the limit of salt and fresh water ( h′ ), velocity ( U ), slope of water surface ( J ), water depth ( H ), width ( B ) and sediment composition ( D ), and a specific optimized form of the estuary is established. The automatic adjustment of estuary is subordinated to the general rules in the alluvial river processes, including: (1) having balance tendency; (2) making initial energy of the system tend to redistribute in some rules; (3) integrating the adjustment processes, that is, the element of the system are influenced with each other and response as a whole; (4) having feedback of automat. For satisfying a transformation from river to sea or from sea to river, the estuary should modulate and transform by mixing salt and fresh water. However, because different estuarine types have their own predominant dynamic conditions, the estuarine system should draw supports from other regimes to do the automatic adjustment in order to maintain the balance. The characteristics of automatic adjustment for the three classes of estuaries are discussed in this paper.

本文对河口的若干重要认识和概念问题进行讨论。其中包括河口的范围与分段,河口类型及其主要特征,河口体系的功能及其为适应河流向海洋过渡或海洋向河流过渡体系内部自动调整作用的特点等。最后在分析河流优势型、潮汐优势型和波浪优势型等3大河口类型体系自动调整作用的基础上,对它们的主要地貌特征形成的机制进行了解释。

According to the sediments collected in summer of 1999,ten major elements of sediments in the Pearl River Estuary were analyzed by using XRF method. Comparing with the Yangtse Estuary and the Huanghe Estuary, the contents of Al and Fe are higher, but the contents of Ca and P are lower in the Pearl River Estuary, indicating that climates, geologic backgrounds and types of estuaries influence the contents of major elements in estuarine sediments. Al, Fe, Ti, P, Mn and K are mainly enriched in the west part of...

According to the sediments collected in summer of 1999,ten major elements of sediments in the Pearl River Estuary were analyzed by using XRF method. Comparing with the Yangtse Estuary and the Huanghe Estuary, the contents of Al and Fe are higher, but the contents of Ca and P are lower in the Pearl River Estuary, indicating that climates, geologic backgrounds and types of estuaries influence the contents of major elements in estuarine sediments. Al, Fe, Ti, P, Mn and K are mainly enriched in the west part of Lingdingyang and in the Turbidity Maximum Zone. The distribution of Si is contrary to Al, Fe and Ti. The contents of Ca, Sr, Na, Mg are higher in the outside of the estuary. The difference of element sources and hydrodynamic conditions are the main reasons causing this distribution of major elements. Correlation analysis and factor analysis show that Si, Al, Fe, Ti, P, Mn, K are originated from terrestrial source and Na, Mg, Ca, Sr are mainly derived from marine source. Clustering analysis indicates that the sampling stations may classified into four groups which basically reflected the characteristics of sedimentation environments and distributions of major elements in Pearl River Estuary.

根据1999年夏季采集的沉积物样品,采用X射线荧光法对珠江口沉积物中10种主元素质量分数进行了分析.与长江口和黄河口相比,珠江口沉积物Al、Fe等元素质量分数高,Ca、P等元素质量分数低,反映了"气候控制效应"、区域地质背景和河口类型对沉积物主元素质量分数的影响.Al、Fe、Ti、P、Mn和K等主要在伶仃洋西部和最大混浊带附近富集.Si的分布趋势与Al、Fe、Ti等基本相反.Ca、Sr、Na和Mg等在口外近海质量分数高.物质来源的差异、水动力环境的不同是造成主元素平面分布方式的主要原因.与重金属相比,大部分主元素在珠江口的垂直分布形式较简单.相关分析和因子分析结果均显示出Si、Al、Fe、Ti、P、Mn、K的陆源特征和Na、Mg、Ca、Sr的海源特征.聚类分析结果表明,研究区站位可分为4类,这种元素地球化学分区反映了珠江口不同区域沉积环境和主元素分布的特点.

 
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