查询词典 sediment-covered

Thirdly, extracting sediment from the riverbed can dredge the channel and reduce the sediment to some extent.

黄河下游堤防曾经采用过放淤固堤、后戗、前戗、压力灌浆，以及截渗墙等加固措施。

The influences of environmental factors on the abiotic methylation were studied. The biggest production of methylmercury was found after 2 days of incubation in presence of FA. The rate of production of methylmercury depends upon temperature. In presence of FA from sediment, the biggest production of methylmercury was found under 40℃. In presence of FA from soil, production rate increases with temperature. The biggest production of methylmercury was found when solution pH was 2 and 4 in presence of FA from sediment and soil, respectively. Increase in concentrations of inorganic mercury and FA solution causes an increase in the production of methylmercury. Under irradiation with ultraviolet ray, blacklight lamp as well as natural light, methylation is stimulated, especial for irradiation of ultraviolet light.

环境条件对汞甲基化作用的影响研究得出，在底泥和土壤FA体系中甲基汞产量均在反应2天后达到最大值；在底泥FA体系中汞的甲基化在反应温度为40℃时产量最大，而在土壤FA体系中，甲基汞产量在10～60℃之间随反应温度升高而增加；底泥和土壤FA体系中汞的甲基化分别在pH值为2和4时最大；甲基汞产量均随无机汞浓度和腐殖质浓度的增加而增加；紫外线、黑光灯和自然光照射都可促进甲基汞的生成，紫外线的作用尤其明显。

The complex fault depression is a combination of two or more half grabens, with each of these grabens having its own independent sediment-supplying systems. Once these half-grabens were filled, they would have an uniform sediment-supplying system and drainage system and would continue to develop as a larger entity of the faulting depression.

所谓的复式断陷是两个或两个以上的半地堑以某种方式组合而成，在一定时期内，相邻的次一级半地堑各有独立的沈积物供给系统，但当各个次级半地堑充填满以后，相邻的次级半地堑具有统一的物源供给系统和水系连通特徵，以较大的整体断陷形式继续发育。

In this paper, a total of 56 relatively nonpoint source pollution sediment samples were collected from the tidal flats of the Jiuduansha shoal and the Chongming island of the Yangtze river estuary. The main properties i. e., grain size distribution, contents of DCB (dithionite citrate bicarbonate extracted iron Fe(subscript d, AAO extracted iron Fe(subscript o, total Fe, DCB extracted Mn Mn(subscript d, total Mn, organic matter, magnetic susceptibility of the samples, as well as the concentrations of Cu, Zn, Pb, Cr, Cd and Ni in the samples, were determined. Basing on the data, the relation of the sediment properties to heavy metal concentrations was evaluated with pearson's rank and partial rank correlation analysis.

采集长江口无明显点源污染的崇明东滩和九段沙潮滩56个沉积物样品，测定沉积物原样和粘粒中Cu，Zn，Pb，Cr，Cd和Ni的含量以及沉积物的主要性状（粒径分布、游离铁、活性铁、总铁、游离锰、总锰、有机碳和磁化率等），以相关分析和偏相关分析研究沉积物中重金属含量与沉积物主要性质之间的关系。

Un-equilibrium transport of sediment is the key of bed evolution of rivers and estuaries. The factors in sediment transport are very complex, for flows with sediments in nature are often turbulent flows.

泥沙输运的不平衡是河道、河口河床演变的物质基础，而影响泥沙输运的动力因素较为复杂，尤其是自然界存在的挟沙水流往往是紊流。

In terms of horizontal distribution, stations near the coast have higher abundance and biomss of meiofauna. In terms of vertical distribution, 74.33% of total meibenthos is found in the surface sediment 0-2cm, 22.31% in 2-5cm and 3.36% in 5-8cm sediment.

小型底栖动物的水平分布呈镶嵌式分布，沿岸站位小型底栖动物的丰度和生物量较高；垂直分布上，小型底栖动物分布于沉积物0-2、2-5cm和5-8cm的数量比例分别为74.33%、22.31%和3.36%。

The real-time, fast, and accurate measurements of sediment and flow rate can help to understand the dynamic soil erosion processes and to automate the monitoring practice of water loss and soil erosion.Volumetric or oven-dry method has long been the standard method for determining sediment concentration.

坡地径流全过程含沙量和径流量的连续、快速、准确和动态监测，为研究土壤侵蚀动态力学过程提供重要的参数，同时使水土流失动态监测网络向自动化和智能化过渡。

In order to study local scouring field near the pier with sediment control dam, the 3-D velocity field of the pier in monomer model is subtly measured by ADV velocimeter of Sontek. This paper analyses the velocity distribution in the scouring pool of pier and takes turbulent strength distribution in different direction. Three new characters for the local scours of piers with the sediment control dam are analyzed and the dam's applicability is brought forward.

采用Sontek公司声学多普勒测速仪对有拦沙坝防护的模型桥墩附近流场进行了精细测量，对桥墩冲刷坑内三维流速分布进行了分析，给出了冲刷坑内三维紊动特征量的分布，分析研究了有拦沙防护坝时桥墩局部冲刷的三个新特点，提出了拦沙坝的适用条件。

The water current fuses rock and the mineral quality in the sediment on the other hand, precipitating the mineral quality of excess in water down or becoming crystal on the other hand, along with water current would gradually the 渗 enter to cover up in the bone in the sediment, filling to fill dental cavity and skeleton the organic quality leaves after ising putrefied of space.

水流一方面溶解岩石和泥沙内的矿物质，另一方面将水中过剩的矿物质沉淀下来或成为晶体，随着水流会逐渐渗进埋在泥沙中的骨内，填补牙齿和骨骼有机质腐烂后留下的空间。

When muddy water is still, sediment will easily be deposited on the sand column to be a new layer for infiltration which is disadvantage to sediment entrance.

静止浑水入渗时沉积比较快，沉积层覆盖在砂柱上方，成为新的入渗层，对分析入渗滞留的状况造成不利的条件。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！