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impoundment
相关语句
  蓄水
     2.18 m/s in wet seasons and 1.56 m/s in dry seasons at fengjie. After the impoundment (water level 135 m), the flow velocity is 1.26 m/s at Fuling, 0.43 m/s at wanzhou, and 0.32 m/s at fengjie.
     在奉节段丰水期和枯水期的平均流速分别为2.18 m/s和1.56 m/s.蓄水后(135 m水位),涪陵段的水流速度为1.26 m/s at Fuling,万州段和奉节段的分别为0.43 m/s和0.32 m/s。
短句来源
     The results demonstrate that after impoundment the pollution concentration reaches 49.4 mg/L from 11.14 mg/L while pollution zone extends 4~10 km.
     得出蓄水后浓度由11.14mg/L增加到49.4mg/L,污染带长度为4~10km。
短句来源
     Analysis on the impoundment process of Three Gorges Reservoir up to EL.135 m
     三峡水库135m蓄水过程分析
短句来源
     Before the impoundment, the mean flow velocity was about 1.91 m/s in wet seasons, and 0.73 m/s in dry seasons at Fuling;
     蓄水前,长江涪陵段丰水期的平均流速为1.91 m/s,枯水期为0.73 m/s;
短句来源
     Before the impoundment, the cross sections in dry and wet seasons were respectively 5684 m2 and 12400 m2 in Fuling reach;
     蓄水之前,涪陵河段枯水期和丰水期的横断面分别是5684 m~2和12400 m~2,奉节的分别为2980 m~2和11300 m~2;
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  “impoundment”译为未确定词的双语例句
     U,Th AND ~(226)Ra VERTICAL MIGRATION IN SUB-CLAY FROM AN URANIUM TAILINGS IMPOUNDMENT
     尾矿库中U、Th和~(226)Ra在亚粘土层的垂向迁移
短句来源
     Numerical Simulation of ~(238)U in Uranium Mill Tailing Impoundment
     铀尾矿库中~(238)U运移数值模拟
短句来源
     MODEL TRANSPORT OF ~(238)U AND ~(226)Ra IN GROUNDWATER AROUND THE URANIUM TAILING IMPOUNDMENT OF AN URANINM MINE
     ~(238)U和~(226)Ra在某铀矿尾渣库的地下水中运移预测
短句来源
     RADIATION SAFETY AND ACCIDENT PREVENTION COUNTERMEASURES FOR URANIUM TAILING IMPOUNDMENT
     铀尾矿库的辐射安全及事故预防对策
短句来源
     OPTIMIZATION ANALYSIS FOR COVER THICKNESS OF URANIUM TAILINGS IMPOUNDMENT
     铀尾矿库覆盖层厚度的最优化分析
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  相似匹配句对
     ENVIRONMENTAL ASPECTS AND CONTROL MEASURES OF TAILINGS IMPOUNDMENT
     尾矿库环境因素与防治措施
短句来源
     THE ENVIRONMENTAL IMPROVEMENT OF DECOMMISSIONING URANIUM TAILINGS IMPOUNDMENT
     铀尾矿库的退役环境治理
短句来源
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  impoundment
Monthly change of community structure of zoobenthos in Xiangxi Bay after impoundment of the Three Gorges Teservoir, China
      
Xiangxi Bay, a typical bay of the Three Gorges Reservoir (TGR) in China, was formed in June 2003 after the impoundment of the TGR.
      
The total density and biomass in August 2004 were 8.8 and 14.3 times those of the initial impoundment, separately.
      
Water impoundment modes of flood utilization for the Songnen Plain
      
The Bal?kdam? Wetland, an impoundment of the upper course of the Sakarya River located near Sivrihisar (Eski?ehir, Central Anatolia), is one of the most important bird conservation areas in Turkey.
      
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Weihe River is one of the tributaries flowing into the Sanmenxia Reservoir. The Lower reach of the Weihe River is a meandering alluvial river with very flat slope. It was in a state of quasi equilibrium in a long term.The confluence of the Weihe River with the main stream of Yellow River is at Tongguan, 113 km upstream from the dam site. The stage at Tongguan may be considered as a local base level of the lower Weihe River.Since the impoundment of the Reservoir,backwater deposits extended upstream in a...

Weihe River is one of the tributaries flowing into the Sanmenxia Reservoir. The Lower reach of the Weihe River is a meandering alluvial river with very flat slope. It was in a state of quasi equilibrium in a long term.The confluence of the Weihe River with the main stream of Yellow River is at Tongguan, 113 km upstream from the dam site. The stage at Tongguan may be considered as a local base level of the lower Weihe River.Since the impoundment of the Reservoir,backwater deposits extended upstream in a rapid rate as a result of the raise of the bed elevation of Tongguan. After the change of the mode of reservoir operation and the subse quent reconstruction of the outlet facilities of the dam, the bed elevation of Tongguan had lowered to some extent. The Weihe River had undergone selfadjustment according to the variation of the bed elevation of Tongguan and the incoming water and sediment flow. L rge floods with hyperconce ntration of sediment took an active part in the flushing of the backwater de-Posits. However,serious deposition have been observed during small flood with hyperconcentration of sediment. In the Process of adjustment, the terminal of backwater deposits of the main channel travelled to and fro in both directins and that of the flood plain extended upstream gradually. The compositions of the bed material became finer and the channel cross section became narrower and deeper. After many years of adjustment the sediment transport and flood concarrying capacity have recovered to a state prior to the construction of the dam.The development of backwater deposits in both main channel anb the flood plain are gradually becoming stabilized.

本文简要地阐述了三门峡水库修建前后,泾、渭河水沙基本特性、渭河下游河道特征、冲淤变化,以及潼关局部侵蚀基准面的升降、渭河口拦门沙消长对渭河河道演变的影响,着重分析了建库后渭河下游河道比降、河床形态、河床物质组成诸因素的调整过程,以及渭河下游滩、槽淤积末端延伸的基本物理图形和延伸规律。指出河床调整及淤积末端发展的趋势。对影响淤积延伸的因素进行了初步的探讨。

The origin and distribution of induced earthquakes, associated with the impoundment of the Xinfengjiang reservoir depend not only on the local tectonic environment but also on the additional stress state which is caused by the water loading strain.Therefore, reservoir induced earthquakes tended to be concentrated on the margin of the lake and occurred in two iayers according to the focal depth, between which is a rare-earthquake layer.The frequency of the shallow events has a correlation to the water level...

The origin and distribution of induced earthquakes, associated with the impoundment of the Xinfengjiang reservoir depend not only on the local tectonic environment but also on the additional stress state which is caused by the water loading strain.Therefore, reservoir induced earthquakes tended to be concentrated on the margin of the lake and occurred in two iayers according to the focal depth, between which is a rare-earthquake layer.The frequency of the shallow events has a correlation to the water level of the lake. On the contrary, the earthquakes in the deep layer occurred more often during offset of the lake. In the Xinfengjiang area there are two kinds of seismic faults. Both of them obviously are high angle active faults, which play a much more important role than low angle faults in occurrence of the reservoir induced earthquakes.By means of mathematical simulation to restore the earthquake sequences of this area after impoundment of the lake, it is sure that in the case of certain tectonic stress field, the high angle faults perpendicular to the additional tension stress are more unstable than the others. The calculations also indicate that the seismic events caused by the given geological model in the presence of the stress field with the maximal stress axes striking N30°W, the minimal stress axes striking N30°E and the moderate stress axes vertical fit in with, the actual earthquakes. The stress fields derived from the calculations are similar to those obtained by other means. Mathematical simulation demons-trats that the NNW-trending fault belt generating the main shock (M = 6.1) is the least stale. The seismogenic structures of main shock and two after-shocks with a magnitude greater than 5 belong to the same fault. After the main shock, the stress states for rock changed, and the NNE and ENE faults are less stable.

本文在地质考察的基础上,采用数学模拟方法,重演了本区的地震序列,论证了诱发地震的构造条件。指出,新丰江水库有两组发震构造,它们的活动强度和时间有所不同。诱发地震的发震构造与水库蓄水前构造地震的发震构造属于相同构造体系,唯发震部位更逼近水库。文章还指出,库基弹性变形引起的附加引张应变使部分地区的活动断裂更易于错动。水库荷载还使地震在剖面上有浅层和深层之分。它们的频度与水库水位有不同的相关性。

Sanmenxia reservoir is the first one of large size built on the Yellow River for multiple-purpose development, having been completed in September 1960 in the main for impoundment. Owing to serious silting, however, the mode of operation was to be altered in March 1962. Rebuilding was carried out twice during the period 1964--1971, to raise the sediment-discharging capacity of the project. Based on the engineering features of the rebuilt structures, and in view of the facts that most of the sediments are...

Sanmenxia reservoir is the first one of large size built on the Yellow River for multiple-purpose development, having been completed in September 1960 in the main for impoundment. Owing to serious silting, however, the mode of operation was to be altered in March 1962. Rebuilding was carried out twice during the period 1964--1971, to raise the sediment-discharging capacity of the project. Based on the engineering features of the rebuilt structures, and in view of the facts that most of the sediments are concentrated in the summer months and that the flood water flowing in the valley below Tongguan is of high sediment-transporting capacity, the reservoir has been operated on the principle of "detaining clear water in non-flood season and discharging sediment-laden flow in flood season and regulating water and sediment regime" since 1974, so that silting of reservoir has been greatly reduced and the section of reservoir area along the valley below Tongguan may be maintained as utilizable storage capacity over long term. Headward sedimentation has been checked in the main. Improvement with respect to channel aggradation on the lower reaches has also been manifest. The reservoir not only plays an important role in flood prevention/and protection against ice run, but also renders returns in irrigation, municipal water supply as well as power generation, more or less. Rebuilding of the Sanmenxia reservoir and operation for regulating water and sediment regimen have been proved to be effective, though preliminarily.It is noticed that oncoming floods and sediment flow have been more favorable Since 1974, The magnitude of discharge from reservoir and the mode of operation of the Sanmenxia reservoir are, however, to be further revised, to fit the present conditions of water and sediment flow. To solve the problem of reservoir silting and to give full play to multiple-purpose utilization of the reservoir are actually contradictory, in view of the high sediment content of the river. The hoisting equipment is not yet sophisticated. The hyper-concentrated flow causes abrasion of parts of hydraulic turbines and outlets concerned, and cavitation is rather severe. All the aforesaid impose restrictions on Sanmenxia reservoir on full development of multiple-purpose utilization, for which further studies and improvements are desitable.

三门峡水库是黄河上修建的第一座大型综合利用工程,1960年9月基本建成并蓄水运用。由于水库的严重淤积,1962年3月被迫改变运用方式,并于1964~1971年先后二次对枢纽工程进行改建,提高了水库泄流排沙能力。根据改建后的工程条件,考虑泥沙集中来自汛期以及潼关以下峡谷河道输沙能力大等特点,自1974年起,三门峡水库采用“蓄清排浑、调水调沙”的运用方式。迄今,库区的泥沙淤积大大缓和,潼关以下峡谷库区保持着可供长期使用的库容,淤积上延基本得到控制,黄河下游河道的淤积也有所改善。同时,水库不但发挥了防洪、防凌作用,而且还取得了一定的灌溉、城市供水和发电效益。三门峡水库的改建和调水调沙运用初步获得成功。但是,1974年以来,来水来沙条件比较有利,三门峡现有的泄流规模和运用方式,尚有待于不同的和不利的水沙条件考验。同时,由于黄河大量的泥沙,在解决水库淤积和发挥水库综合效益上互相制约;闸门启闭设施不完善;高含沙水流对水轮机过流部件和泄水建筑物的磨损、气蚀严重,这些问题使三门峡水库所能发挥的综合效益受到限制,还有待进一步研究改进。

 
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