查询词典 sediment-covered

SWAT model is a kind of distributed hydrologic model with the ability to evaluate the effects of landuse change on hydrologic response. This model was applied in Cao River catchment of Miyun reservoir basin. First, the sensitive parameters were identified through sensitive analysis. Then, the calibration and validation for flow and sediment were performed from 1986 to 1991 at Xiahui gaging station. The results of model evaluation show that the streamflow was simulated excellently, and sediment is also well simulated.

将可表征土地利用变化对水文响应影响的分布式水文模型SWAT应用于密云水库潮河子流域，对模型的敏感性进行了分析，并采用1986~1991年下会水文站数据对其径流量和泥沙负荷进行了率定和验证，模型评估结果表明该模型对径流的模拟效果非常好，对泥沙的模拟效果较好。

In chapter 4, the complex relation of water and sediment between the Jingjiang and Dongtinglake is analysed, and it's also pointed out that the main reasons resulting in frequent flood disasters and complex relation in Jingjiang -Dongtinglake area are variation of water and sediment distributing of the 3 ostia, complex combination of flood of Xiang, Zi, Yuan, Li and influence in Chenglingji between flood from the Jingjiang and Dongtinglake.

第四章分析了荆江—洞庭湖复杂的水沙关系，指出三口分流分沙的变化、四水复杂的洪水组合以及荆江出流和洞庭湖出流在城陵矶的相互顶托等因素，是导致湖区洪涝灾害频繁、江湖关系错综复杂的主要原因。

In the river sediment model with a movable bed , there are two key problems which are how to think about interaction of water and sediment and how to proceed the large distorted roughening to meet resistance similarity.

在河流动床泥沙模型中，如何考虑水沙之间的相互作用，以及在模型动床上如何进行大变态加糙，以满足河流阻力相似，一直是难以解决的两个关键问题。

In the experiments used for this compilation, the from of the bed was changed from plane without sediment movement, to ripples, to dunes, to transitional, to plane with sediment movement and to antidunes by altering flow conditions.

在实验中被用来编辑，在流程情况改变情况下，被改变的床从没有沉积运动阶段，到波纹、沙丘、过渡，再到以沉积运动阶段最后到antidunes。

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 use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。