1)river sediment河流沉积物
1.Mercury,arsenic and antimony are common items in soil and river sediment samples in environment monitoring.Hg、As、Sb是土壤和河流沉积物的常规测定项目。
2.The Korean r iver sediments have much lower TIC,C a and carbona te contents than Chinese river sediments,whereas the Changjiang sediment is cha racterized by hi gh Ti content and the Huanghe sediment by h igh Ca,Na and car bonate contents.韩国河流沉积物中Ca及碳酸盐含量显著低于长江和黄河,而其他元素含量则在二者之间;黄河沉积物以总无机碳(TIC)、Na和Ca含量高为特征,而长江沉积物则显著富集Ti和P。
3.In terms of the geochemical distribution and seasonal variation of N, P and trace heavymetals in the sediments, Brisbane, Australia, this paper discusses some research methods applica-ble to environmental geochemistry of river sediments, and the mechanism of river pollution, pro-viding the important scientific basis for river evaluation and environmental arrangement control.本文通过对澳洲普洛斯本河现代沉积物的粒度、营养元素和微量重金属元素地球化学分布及其季节性差异的研究，探索了河流沉积物环境地球化学的研究方法，阐述了河流现代沉积物的污染现状和规律，为河流的评价和环境治理等提供了重要的科学依据。
英文短句/例句
1.BACKGROUND VALUES OF METAL ELEMENTS IN RIVER SEDIMENTS WITHIN THE BEIJING AREA北京地区河流沉积物的金属元素背景值研究
2.River Sediments in Gaoling County of Xi an Area, Shaanxi Province and Palaeoevirormental Research;西安高陵耿镇河流沉积物与古环境研究
3.Kinetics of Adsorption of Pb~(2+) onto Small River Sediment城郊小河流沉积物吸附Pb~(2+)的动力学过程
4.Pollution situation and assessment of heavy metals in fluvial sediments in suburb of Taicang太仓郊区河流沉积物重金属污染现状及评价
5.A river kind of sediment Certified Reference Material( CRM) based on natural-matrix for environmental radioactivity has been developed.研制出一种天然基质的河流沉积物环境放射性标准物质。
6.Potential Biological Toxicity Assessment on the Pollution of Heavy Metals in Fluvial Sediment in Chongqing重庆市城镇河流沉积物重金属污染的潜在生物毒性评价
7.River sediments gradually silted the harbor.河流的沉积物逐渐使港口淤积
8.Sedimentological Studies on Holocene Paleoflood Slack Water Deposits in the Drainage Basin of Yiluo River;伊洛河全新世古洪水平流沉积物的沉积学研究
9.Rivers and torrents carried great loads of sediment out to sea.河流挟着大量沉积物奔流入海。
10.Studies on Persistent Organic Pollutants in the Surface Sediments of Liao River Basin;辽河流域沉积物中持久性有机污染物的研究
11.Relationship among Modern Pollen Spectra, Vegetation and Sedimentary Environment from the Drainage of the Red River, Vietnam越南红河流域表层沉积物花粉组合与植被、沉积环境关系探讨
12.An Investigation on Thermoluminescence Dating of the Step Terrace Sediments of Guangdong Coastal Rivers广东沿海河流阶地沉积物热释光年龄测定研究
13.Study of Heavy Meatal Pollution of the Sediment in Beiyunhe River in Beijing北运河流域沉积物重金属污染状况分析
14.Release of Organochlorine Pesticides from Sediments in Haihe River Mainstream海河干流沉积物中有机氯农药的释放行为
15.DDTs Transport Between Sediment and Water in the Mainstream of Haihe River in the Urban AreaDDTs在海河干流市区段沉积物/水间迁移行为研究
16.Transport of HCHs Between Sediment and Water in the Mainstream of Haihe RiverHCHs在海河干流沉积物/水间迁移行为研究
17.The Study on Characteristics of Slackwater Deposits of Palaeoflood Sedimentary in the Loess Regions黄土地区河谷古洪水平流沉积物特征研究
18.Sediment begins to choke the channel's opening.沉积物开始淤塞河道口。
相关短句/例句
river sediments河流沉积物
1.By analyzing the mercury contained in the waters,soil,propagations and sediments near the gold mine,on the upper Songhua River,which is along the east of Jilin Province,we have founded that the mercury pollution in river sediments was very serious.采样分析了吉林省东部松花江上游金矿开采区及其附近水、土壤、动植物及河流沉积物样品中汞的含量,发现河流沉积物中汞的污染相当严重;受其影响当地的植物和两栖类动物———中国林蛙体内总汞和甲基汞含量也明显高于对照组。
2.There is a variety of environmental information contained in the river sediments.河流沉积物中蕴含丰富的环境信息。
3)sediment[英]['sed?m?nt][美]['s?d?m?nt]河流沉积物
1.Chemical forms and ecological risks of heavy metals in river sediment at carbonatite mining area.;碳酸盐岩矿区河流沉积物中重金属的形态特征及潜在生态风险
2.Samples of polluted soil,unpolluted soil,mine tailing and river sediments were analyzed for pH,S content,heavy metals and rare earth elements in surface soil and soil depth profiles to assess the level of soil pollution.为此,对矿区下游污染区和非污染区的农田土壤、尾砂和河流沉积物进行了系统调查和研究。
4)fluvial deposit河流沉积物
1.In order to establish magnetic fabric identification marking on the different deposit environment in the area of middle reaches of Yangtze river,we studied the magnetic fabric parameter character of modern fluvial deposits.对长江中游?洲湾一带不同类型河段(平直和弯曲)、不同水文环境(高滩、低滩、心滩)沉积物磁组构参数特征的系统取样、测量和统计分析结果表明:1)平直河段沉积物的磁化率各向异性参数的K、P、F、Fs、T以及E的统计平均值均比弯曲河段处相应磁组构参数值略偏大,而q、L的统计平均值却比弯曲河段河流沉积物的相应磁组构值略偏小;2)平直河段各向异性量值椭球长轴磁偏角方向明显,其与水流作用方向具有很好的一致性,而在弯曲河段各向异性量值椭球长轴磁偏角的方向分散,反映了在弯曲河段处水流具有方向多变的特点;3)从河流高滩、低滩到心滩沉积物的磁化率各向异性参数P、F、T、Fs、E的统计平均值均具有从小逐渐变大,而磁基质颗粒度q、磁线理L却从大逐渐变小的变化趋势。
5)anastomosing stream deposit辫状河流沉积物
6)fluvial deposit河流沉积
1.The environmental and fluvial deposits change indexes are related to the grain size,pollen analysis,with the AMS14C dating.对长白山松江水文站阶地剖面的粒度参数和孢粉进行分析,结合AMS14C测年数据并与历史记录相校验,重建该区的气候环境演化特点与河流沉积物的相变过程。
延伸阅读
沉积物控制 沉积物控制是循环冷却水处理(见循环冷却水系统)的一个主要内容。沉积物是指沉积在给水系统中的管壁或设备壁上的固体的统称。 沉积物类型 循环冷却水的沉积物成分较复杂，可分为盐垢（水垢）、污垢和粘垢三类。盐垢指水中盐类，特别是某些微溶盐类，因水温升高而溶解度降低，从水中析出而形成的沉积物。常见的有碳酸钙、硫酸钙、磷酸钙和硅酸镁。污垢指水中腐蚀产物、工艺漏料(如油)、泥沙、粉尘、碎屑、菌藻等不溶杂质所形成的沉积物。粘垢指由微生物及其代谢产物和一些其他杂质夹杂在一起而形成的凝胶状、粘泥状物质。沉积物除堵塞管道和换热设备外，还有降低传热效率、增加能耗和造成垢下腐蚀等害处。 沉积物控制因素 指将沉积物控制在一定限度内，以保证循环冷却水系统的正常运行。控制微生物即可控制粘垢。控制补充水和循环水的悬浮杂质，并在循环水中投加分散剂或高分子凝聚剂，即可控制污垢。盐垢的控制方法有：①加酸。常用的是硫酸或二氧化碳。硫酸的作用是降低水中的重碳酸根的浓度，从而防止产生碳酸钙沉淀。加二氧化碳是使水中碳酸根转化为重碳酸根，以防止碳酸钙沉淀。②加阻垢剂。常用的有聚磷酸盐、磷酸酯、膦酸盐、聚羧酸盐等。③软化和除盐。降低水中溶解盐类，以避免出现盐垢。软化和除盐只在特殊情况下才采用。 水质稳定处理 循环给水或直流给水系统中最常出现的盐垢是碳酸钙沉淀。碳酸钙 (CaCO3)沉淀和水中二氧化碳(CO2)之间的关系可表示为： 当水中CO2浓度不足以保持这一平衡关系时，产生CaCO3沉淀;当CO2浓度超过这一平衡关系时,水中无CaCO3沉淀，CO2产生侵蚀作用。二氧化碳的过量与不足都造成水质的"不稳定"情况。当水中CaCO3和CO2的浓度正好满足化学平衡的关系时,称为水质稳定。这时既无CaCO3沉淀,也无CO2的侵蚀作用。鉴别稳定性的最通用指标是兰格利尔饱和指数,简称兰格利尔指数。饱和指数＝pH-pHS,式中pH值为水的实测值；pHS值则是当水质稳定时,水应有的pH值,与水温有关。饱和指数等于零时,水质稳定；大于零时,水将产生CaCO3沉淀；小于零时,将有CO2侵蚀作用。在测得水的温度、pH值、钙和碱度后,可以计算pHS值。
