查询词典 sediment-covered

In this paper are discussed the baseline geochemical maps of elements harmful to human health, using concentration values of 2389 stream sediment samples collected over the Campania region.

本文利用从意大利南部坎帕尼亚地区采集的2389个河流沉积物样品的浓度值，讨论对人体有害元素的基线地球化学图。

The metals distribution of Dagu canal and its tributaries in surface water, porewater and sediment have been studied.

本文研究和探讨了大沽排污河及其支流的沉积物上覆水、孔隙水以及沉积物中金属的沿程分布特征。

Time series simulations are consistent with sediment records from lake bottom cores back to 100 years ago, and spatial distribution modeling of nutrient resources are agreement with changes in the geographical features. The work suggests that the simulations can catch basic characters of the basin nutrient changes, and provides a powerful tool to evaluate nutrient resources, sedimentations and distributions responding to historical changes in catchment environments.

模拟总氮和总磷浓度与太湖沉积钻孔沉积样推算的水体含量的数量级和变化范围相当，太湖流域的营养盐空间来源模拟也能够与流域自然地理变化吻合，表明模拟能够捕捉到流域营养盐历史变化特征，对湖泊营养物质来源、沉积和空间分布的流域环境历史变化响应具有良好模拟能力。

Ore source of celestite mineralization system is complex in this area. Weathering and erosion of the floor of the basin and the mountain around the basin, evaporite sediment in the earlier, deep water, Mesozoic and Cenozoic volcanism can provide the strontium. In particular, serving as initial ore source, oil-field brine supplies the majority of strontium.

该区矿源场分析表明，锶的来源有基底和周边山系风化剥蚀来源、老含盐地层补给、深部水和中、新生代火山活动补给；其中，盆地基底和周边老山风化以及深部水补给为主要来源，特别是油田水作为矿源层为锶矿床的形成提供了大量锶源。

The vane is a technique for river bank protection,which can alter direction of velocity and eliminate observably the centrifugally induced secondary current to reduce concaved bank scour and protrude bank sediment in river curves.

导流板是一种保护冲刷河道河床的技术。它能够改变水流的流向并能显著地减少弯道水流中的次生水流，从而解决了弯道中凹岸冲刷，凸岸淤积的问题。

This is changeable and rapid rate of sediment production.

这是种多变而快速的沉积作用。

Steve Gloss, of the United States'Geological Survey, reckons that the chub'sdecline is the result of their losing their most valuable natural defence, theColorado's rusty sediment.

据美国地质勘探局的史蒂夫格劳斯估算，弓背鮭的减少是由于它们失去了它们最有价值的自然防卫——科罗拉多河里的红锈沉积物。

The content of sulphate reducing bacteriaof the 35 sediment samples was determined by using MPN technique in the survey areas of Bering Sea and Chukchi Sea.

用 MPN法测定了取自白令海和楚科奇海 35个沉积物样品中的硫酸盐还原菌含量。

Sediment core samples were collected from the continental shelf of the Chukchi Sea in July 1999 and rare earth elements were measured by instrumental neurton activation analysis.

于 1 999年夏季我国首次北极科学考察期间在楚科奇海采集了三个沉积物岩芯，并采用中子活化法测定了沉积物样品中稀土元素的含量。

In order to reflect the toxicity of cadmiumin the two different systems: overlying water system and water-sediment coexistence system, the toxicological parameters such as metal body burden, MT and mortality in a freshwater cladoceran Daphnia magna after exposure were quantified.

选择大型溞作为受试生物，以大型溞体内金属积累量、金属硫蛋白含量和死亡率作为测试指标，考察了上覆水体系与水柱-沉积物共存体系中金属镉的毒性状况，探讨了水体沉积物中重金属的生物毒性作用机制。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。