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gorges     
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  三峡
     Study of strength and stability for the chamber wall and the slope of the permanent lock in Three Gorges project
     三峡永久船闸闸室墙及边坡的强度与稳定性研究
短句来源
     Study on Grazing and Utilization of Goats on a Shrubland in the Three Gorges Region of Yangtz River
     长江三峡地区灌丛草地山羊放牧利用研究
短句来源
     Forming of the Three Gorges of the Yangtze River and Sedimentary Response in the West Edge of Jianghan Basin and Adjacent Area
     长江三峡的贯通与江汉盆地西缘及邻区的沉积响应
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     Mechanical Model for Hydraulic Structure Contact Problem and Its Applications in the Three Gorges Project
     水工结构接触问题的力学模型及其在三峡工程中的应用
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     Modeling Study of Nonpoint Source Pollution of Watershed in Three Gorges Reservoir Area
     三峡库区农业非点源污染及其模型模拟研究
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  三峡水
     R/S analysis of landslide time record in the Three Gorges Reservior Area
     三峡水库区滑坡时间记录的R/S分析
短句来源
     Application of GPS technique for landslide monitoring in Yunyang County of the Three Gorges Reservoir area
     GPS在三峡水库区云阳县滑坡监测中的应用
短句来源
     Furthermore, a subsystem for simulation of water pollution accidents suitable for decisionmaking in management of water environment of the Three Gorges was developed by integration of GIS with the technology of water pollution modeling.
     将GIS与水污染模型技术相结合,开发了适合长江三峡水环境决策管理的水污染事故模拟子系统.
短句来源
     Analysis on the Deformation of typical landslides at Yunyang County in the Three Gorges Reservoir region based on monitoring data
     长江三峡水库区云阳县典型滑坡变形监测分析
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     Deformation and failure modes and genetic mechanisms of typical rocky slopes in Fengjie County, Three Gorges reservoir region
     三峡水库区奉节县典型岩质斜坡变形破坏模式及成因机制分析
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  “gorges”译为未确定词的双语例句
     THE VERTICAL DISTRIBUTION OF AGROTOPOCLIMATIC RESOURCES IN THE WARM SECTORS OF THE THREE GORGES AREA OF THE CHANGJIANG RIVER
     THE VERTICAL DISTRIBUTION OF AGROTOPOCLIMATIC RESOURCES IN THE WARM SECTORS OF THE THREE GORGES AREA OF THE CHANGJIANG RIVER
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     The Three Gorges Project and Building of the Human Settlement Environment
     The Three Gorges Project and Building of the Human Settlement Environment
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     ENVIRONMENTAL PERSPECTIVE:BENEFICIAL AND ADVERSE EFFECTS OF THREE GORGES PROZECT
     ENVIRONMENTAL PERSPECTIVE:BENEFICIAL AND ADVERSE EFFECTS OF THREE GORGES PROZECT
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     The Three Gorges of the Yangtze River
     The Three Gorges of the Yangtze River
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     The Three Gorges Region of Changjiang River is meshed to form 9309 squared grids in 2.5km×2.5km (1cm×1cm in map).
     采用2 5km×2 5km(图面1cm×1cm)的网格剖分整个区域,共形成9309个网格。
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  gorges
Four different kinds of water treatment were applied to examine the photosynthetic characteristics of baldcypress (Taxodium distichum) seedlings in the hydro-fluctuation belt of the Three Gorges Reservoir area.
      
distichum takes on the features of a water-tolerant and hydrophilic plant, which can be considered as one of the species for the building of a forest protection system for the hydro-fluctuation belt in the Three Gorges Reservoir area.
      
Effects of reforestation on the hydrological function of a small watershed in the Three Gorges Reservoir Area
      
Four different kinds of water treatments were applied to study the photosynthetic eco-physiological characteristics of Taxodium ascendens seedlings in the environment of the Three Gorges hydro-fluctuation belt.
      
To establish a protection forest system in the hydro-fluctuation belt in the Three Gorges Reservoir Area, the species T.
      
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After the construction of reservior in an alluvial stream, the equilibrium condition of the downstream channel will be upsetted due to the reduction of sediment supply. This will result in a change in the form and gradient of the channel. The direction of the displacement will lead to a reduction of the sediment carrying capacity of the channel, through which the river regains its equilibrium. The whole process is accomplished by the flattening of the bed slope, as suggested by the theories generally accepted...

After the construction of reservior in an alluvial stream, the equilibrium condition of the downstream channel will be upsetted due to the reduction of sediment supply. This will result in a change in the form and gradient of the channel. The direction of the displacement will lead to a reduction of the sediment carrying capacity of the channel, through which the river regains its equilibrium. The whole process is accomplished by the flattening of the bed slope, as suggested by the theories generally accepted at the present. From a study of the fluvial processes of Colorado River and some other streams, it appears that a decrease in channel gradient is one of the three possibilities only, and should not be regraded as an universal rule. In fact, the change in bed slope below an impounding reservoir depends essentially on the geologic and geographic conditions of that area. It is first considered that the channel width does not change materially in the downstream direction. In many of the sandy rivers, there exists, a layer of gravel or pebble below the finer surface material. The inclination of this layer is generally steeper than the present bed slope. After the releasing of clear water from the reservoir, the surface material is carried away and thereby exposing the coarse layer, first near the dam and gradually extended to the downstream. This will result in an uneven erosion along the direction of the flow, and the steepening of the channel gradient is the consequence of such a process. The Colorado Eiver below the Hoover Dam belongs to this case. If the distribution of the bed material in the downstream, direction is more or less uniform, and if there exists no coarse layer within a finite depth below the bed surface, the bed will be degraded as a whole and the channel gradient remains essentially at its initial value. Results of flume study seem to indicate that such is the case. The Colorado Eiver below both the Parker and the Imperial Dam also belongs to this group. Only when there is a base level within a short distance from the dam which controls the depth of scour at that neighborhood, or if ther is a tributary which brings coarser material into the lower part of the reach, will the channel slope below the dam become flatter. On the other hand, if the river is impounded in a gorge and enters a plain not far away from the dam site, the width of the channel on the alluvial fan becomes progressively wider downstream. It is then possible that the depth of degradation decreases in the downstream direction and the slope becomes flatter. This case is well illustrated by one of the rivers in U. S. S. R. It must be realized that no matter how the channel gradient below an impounding reservoir changes, it is mainly through the coarsening of the bed material which makes the channel regains its equilibrium. Two different types of the coarsening of the bed material can be distinguished from the field data available. One of which is the exposing of a gravel or pebble layer below the present alluvium. As soon as this layer is exposed, there will be a sudden jump in the bed material size, and the stream channel becomes stable again. The othertype of coarsening of bed material takes place continuously and at a much slower rate. One often fails to notice the occurence of such a phenomenon, as the size of the bed material only increases in a relatively small amount. Yet, such a small increase in bed material size results in a much significantly rise of the roughness coefficient, by remolding the sand bars on the bed surface. Both the velocity of the flow and the sediment carrying capacity of the channel will be reduced, and the river gradually re-establishes its equilibrium. It is now possible to calculate such a proeess according to the theories on sediment transport and river roughness. Following the coarsening of the bed material, the down-cutting rate of the stream channel decreases with time. Both the flume studies and field measurements indicate that the relationship between the down-cutting rate and the cumulative time of erosion is an exponential one. This study demonstrates that the fluvial processes of an alluvial channel depend very much on the hydrographic conditions of the basin, of which the stream forms a part. One can't visualize the whole aspect of the problem (?)y studying the fluvial proteases through hydraulics, view-point only.

冲积河流上修建水库以后,下游河道将失去平衡。河流为了重新建立平衡,必将发生一系列的变化。本文对这—变化的过程,提出了一些新的概念。根据枢纽下游所在地区的地质地理条件,河流的坡降可以有各种不同的变化。坡降的渐趋和缓只是三种可能性中的一种,不能当做普遍规律来看待。河槽的重新建立平衡,主要是通过河床质的粗化作用。河床质的粗化现象具有两种不同的类型。一种是河床表层复盖物因清水冲刷而外移,露出了底下属于另一地质时代的较粗的卵石层,这时河床质的粒径会发生突变。另一种是由于水流的分迭作用,河床质的变化是连续的,徐缓的。在第二种情况下,河床质的粒径虽然变化不多,但是,通过河底沙垅的加多,却可以使曼宁糙率系数有很快的增加,这就使水流的流速降低,挟沙能力减小,河流逐渐建立起新的平衡。随着河床质的渐次粗化,河床的冲刷下切率与时俱減。野外实测结果及水槽试验成果都指出冲刷率与冲刷历时之间成一指数关系。河床质中不能为水流所挟运的颗粒所占百分比愈大,冲刷率下降得愈快,河道重新恢复平衡所需要的时间也愈短。从黄河下游的具体情况来判断,将来修建枢纽以后,下游河道在承受清水冲刷时可能作整体下降,坡降的变化不会很大。黄河下游的河床质虽然很细,同样也...

冲积河流上修建水库以后,下游河道将失去平衡。河流为了重新建立平衡,必将发生一系列的变化。本文对这—变化的过程,提出了一些新的概念。根据枢纽下游所在地区的地质地理条件,河流的坡降可以有各种不同的变化。坡降的渐趋和缓只是三种可能性中的一种,不能当做普遍规律来看待。河槽的重新建立平衡,主要是通过河床质的粗化作用。河床质的粗化现象具有两种不同的类型。一种是河床表层复盖物因清水冲刷而外移,露出了底下属于另一地质时代的较粗的卵石层,这时河床质的粒径会发生突变。另一种是由于水流的分迭作用,河床质的变化是连续的,徐缓的。在第二种情况下,河床质的粒径虽然变化不多,但是,通过河底沙垅的加多,却可以使曼宁糙率系数有很快的增加,这就使水流的流速降低,挟沙能力减小,河流逐渐建立起新的平衡。随着河床质的渐次粗化,河床的冲刷下切率与时俱減。野外实测结果及水槽试验成果都指出冲刷率与冲刷历时之间成一指数关系。河床质中不能为水流所挟运的颗粒所占百分比愈大,冲刷率下降得愈快,河道重新恢复平衡所需要的时间也愈短。从黄河下游的具体情况来判断,将来修建枢纽以后,下游河道在承受清水冲刷时可能作整体下降,坡降的变化不会很大。黄河下游的河床质虽然很细,同样也存在着粗化的可能。通过粗化作用,可以使河床下切的深度大大减低。

When the tall rigid frames for boat lefting in the Three Gorges were being analysed, we discovered that the so—called method of single distribution of moments can be improved upon as well as a new method of stress determination, namely the method of mean 'stiffness. For the calculation of tall frames, it was found that by means of lhese two methods accurate or approximate results can be obtained quickly and with great ease.In the case of the improved version of single distribution of moment method, a correction...

When the tall rigid frames for boat lefting in the Three Gorges were being analysed, we discovered that the so—called method of single distribution of moments can be improved upon as well as a new method of stress determination, namely the method of mean 'stiffness. For the calculation of tall frames, it was found that by means of lhese two methods accurate or approximate results can be obtained quickly and with great ease.In the case of the improved version of single distribution of moment method, a correction coefficient for the stiffness λ is to be used (λ_(AB)=1—C_(AB) C_(BA) μ_(BA), SO λ_(AB)=1—1/4μ_(BA), when the ordinary carrying factor is 1/2 and λ_(AB)=1—μ_(AB), when the oridnary carrying over factor is-1, where μ_(BA) is the ordinary distributing coeffcient). Multiplying the stiffness by this correction coeffcicnt, a set of distributing factors are calculated ( the same as those obtained by T. Y. Lin ). At the same, time, the ordinary carrying over factors are multiplied by the reciprocal of the correction coeffcient (?)/λ, so that a set of new carrying over factors are obtained. In this waY the calculation of new carrying over factors is much simplifted, at the same time the process of single distribution is also much simplified.In the case of the method of mean stiffness, an unsymmetrical multi-—story singlespanned rigid frame is transformed into a symmetrical one by using the mean stiffness instead of those original ones the structure. In this way the frame can then be analysed by means of Shagin (?) basic members and a single distribution with constant shears is crrried out. After this with a few ( once or twice ) simple adjustments, highly accurate results are ensued. This method can also been used for non-symmetrical multi-story and multi-spanned rigid frames as well (?) Vierendecl girders, and will give results to any degree of aocuracy quickly.

在三峽升船机高排架的計算中,我們对力矩一次分配法进行了改进,并研究出一个平均剛度法,这两个方法无論用之于高排架的精確計算或近似計算都是比較簡单而迅速的。改进后的力矩一次分配法是利用剛度修正系数入(λ_(AB)=1—C_(AB)C_(BA)μ_(BA)’当普通傳递系数C是(?)时則λ_(AB)==1—1μ_(BA),当普通傳递系数是—1时则λ_(AB)=1—μ_(BA),式中μ_(BA)是普通分配系数)乘剛度后計算一套分配系数(和林同棪的相同)再利用同样的剛度修正系数的倒数1/λ乘普通傅递系数,即得修正傳递系数,这样就能使修正傳递的系数的計算很簡单而且一次分配的过程也很簡单。平均剛度法是将不对称单跨多层剛架用平均剛度的办法使轉化为对称,从而可利用Шагин基本构件进行无剪力一次分配,再进行次数不多的(1至2次)簡单修正,即可得相当精确的結果,这个方法也可用之于不对称多层多跨剛架和不对称的空腹剛架的计算,迅速得出我們需要的任意精確的结果。

Since 1958, in connection with the design of several hydraulic engineering projects, the Research Group of arch-abdomen Dam has made extensive laboratory studies on new types of dam, such as: arch abdomen, arch-abdomen with wide transverse joints, and arch shaped arch-abdomen, with a view to improve the stress condition of dam, to increase the capability of resisting overloading and to save material. This paper chiefly describes the general character of stress distribution of the arch shaped arch-abdomen dam....

Since 1958, in connection with the design of several hydraulic engineering projects, the Research Group of arch-abdomen Dam has made extensive laboratory studies on new types of dam, such as: arch abdomen, arch-abdomen with wide transverse joints, and arch shaped arch-abdomen, with a view to improve the stress condition of dam, to increase the capability of resisting overloading and to save material. This paper chiefly describes the general character of stress distribution of the arch shaped arch-abdomen dam. which, under the combined arch action in horizontal plane and arch in transverse cross section, will significiently improve the stress distribution in the dam and around the holes, galleries and arch-abdomen. The arch shaped arch- abdomen dam is more economical and better adaptable to narrow river gorges in central and southern part of China, characterized by large flood discharges. This arrangement will better solve the contradiction between the power house and flood discharging structures, and usually will be an effective measure to save large amount of power house excavation.

58年以来结合某些水利工程设计,从改善坝体应力,加大超载能力和节约的角度对 新坝型如腹拱坝、宽缝腹拱坝和拱形腹拱坝进行了实验研究。本文着重介绍拱形腹拱坝 的坝体应力的一般规律。拱形腹拱坝在水平拱和剖面拱的共同作用下,大大改善坝体应 力以及腹拱和孔洞周边应力,它是较经济的坝型,较适合我国中部和南方河流窄河谷, 大洪水流量的特点,较好地解决了厂房和洩洪布置上的矛盾,往往是大量节约厂房开挖 的有效措施。

 
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