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沙减少
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  sediment decrease
     The results showed that annual runoff and sediment in 1970~1995 decreased 25.9×10 8m 3 and 1.11×10 8t respectively compared to that in prior period, and the impact of human activities on water and sediment is about 58.3% and 55.7%. Human activities are main causes of runoff and sediment decrease in recent years.
     结果表明 :1970~ 1995年 ,渭河华县站年均径流、泥沙量较前期分别减少 2 5.9亿 m3和 1.11亿 t,其中 58.3%和 55.7%是由人类活动影响所致 ,人类活动是渭河近年来水沙减少的主要原因
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  “沙减少”译为未确定词的双语例句
     Though large quantity of sand is extracted in the recent years,but it is not the main cause of the decrease of sediment discharge of Yangtze River to the sea.
     长江中下游河道的采砂量虽然很大,但却不是导致入海泥沙减少的主要原因,由河道采砂引起的河流输沙减少的相应比例应该不到采砂量的10%。
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     In general, in the period from 1970 to 1999, decrease in precipitation is main reason that caused water and sediment reduction, and its influence account for 63.1% and 73.6% of total reduction of water and sediment respectively.
     总的来看,1970~1999年期间,降水减少是孤山川流域水沙减少的主要原因,其影响量分别占到径流、泥沙总减少量的63.1%和73.6%。
     2) 80% of accumulated sands in front of the grottoes at night are reduced;
     2)洞前夜间积沙减少了80%以上;
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     It is pointed out that because of irrigation, reservoir construction, soil and water conservation measures, and warping dam;
     指出由于农田灌溉、修建水库、坡面水保措施增多和淤地坝建设等而影响了水沙情势,导致水沙减少
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     The cubage of Xiaolangdi Reservoir is 126.5 hundred million m , including 75.5 hundred million m~3 for the sediment and 10.5 hundred million m3 for adjusting water and sediment. It can reduce the silt in the riverway by adjusting the water and the sediment for operation of 5 years .
     小浪底水库总库容126.5亿m~3,其中淤积库容75.5亿m~3、调水调沙库容10.5亿m~3,5年来的运行实践,实现了通过调水调沙减少下游泥沙淤积的目标。
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  相似匹配句对
     Cotton yam has seriously hairiness.
     毛羽减少;
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     contrarily reducing.
     反之减少
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     (3) Fly coal ash could decrease the total sediment.
     (3)粉煤灰能够减少量。
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     Nature factors include high wind, decreasing precipitation and enough sand sources.
     自然因素包括大风、降水减少及其源。
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     The Focal Point of Attention: Beijing in Crisis of Sand
     没北京?
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  sediment decrease
Selenium concentrations in sediment decrease along flow paths downgradient within the wetland system.
      
Selenium concentrations in sediment decrease along flow paths downgradient within the wetland system.
      


The water and sediment ronoff data of the Yellow River as well as the sedimentation in the Sanmenxia Reservoir and downstream reaches during 1981-1985 are briefly described in the paper. Factors accounting for the reduction of sediment as well as the characteristics of sediment transport in the lower reaches are analysed Some ideas have been put forward about how to operate the proposed Xiaolandi Reservoir by controlling the water and sediment outflow in order to reduce the deposition in the lower reaches.

本文介绍了1981~1985年黄河来水来沙、三门峡水库及下游河道冲淤概况,分析了近五年少沙原因和下游输沙特点,并进而对利用小浪底水库调水调沙、减少下游河道淤积提出了见解。

Proceeded for the purpose of keeping the effective storage of Nanqin Reservoir, measures for prevention of the upward extension of deposition, the formation of armouring layers due to the entering of gravel bed load into the effective storage, modes of the sediment ejection to reduce deposition by suspended load and regular sluicing by emptying to recover storage are summarized in the light of available data. Problems concerning the design of flood plain, regulating storage of muddy water and sediment and recovery...

Proceeded for the purpose of keeping the effective storage of Nanqin Reservoir, measures for prevention of the upward extension of deposition, the formation of armouring layers due to the entering of gravel bed load into the effective storage, modes of the sediment ejection to reduce deposition by suspended load and regular sluicing by emptying to recover storage are summarized in the light of available data. Problems concerning the design of flood plain, regulating storage of muddy water and sediment and recovery of storage By sluicing are studied.

本文从保持南秦水库长期有效库容出发,总结出防止末端淤积上延破坏和砾石推移质入库形成抗冲层的措施;充分利用浑水水库排沙减少悬移质淤积,定期泄空冲刷恢复有效库容的运用方式.并对设计滩面、调浑库容、可冲库容和调沙库容等问题进行了探讨.

From mathematical model, this paper deals with the characters of sediments transport and deposits of the Lower Yellow River on the average of water and sediments of multiple years and obtains the quantities of sediments reduced when the equilibrium of scour and deposit of sediments is reached in the Lower Yellow River. The results are got as follows.1. It is Possible to use the movable-bed mathematical model of nonequi-librium transport of nonuniform sediment in order to inquire into the characters of sediments...

From mathematical model, this paper deals with the characters of sediments transport and deposits of the Lower Yellow River on the average of water and sediments of multiple years and obtains the quantities of sediments reduced when the equilibrium of scour and deposit of sediments is reached in the Lower Yellow River. The results are got as follows.1. It is Possible to use the movable-bed mathematical model of nonequi-librium transport of nonuniform sediment in order to inquire into the characters of sediments transport in the Lower Yellow River. The numerical results conform with the field investigations fundamentally.2. The nonuniformity of longitudinal deposits of sediment in the Lower Yellow River is caused by the nonuniformity of longitudinal deposits of coarse and middle sediments. This c onclusion shows that the relationship of contrast of sediments and capacity of sediments transport is different in the sections of river. Generally, sediments conform with the capacity of sediments transport better nearer to the mouth of river.3. The policy of primary and secondary may be taken to bring the Lower Yellow River under control according to the character of sediments deposit. The Coarse and middle sediments are 79.5% in all the sediment deposits, but only 43.3% in the sediments. The river channel has lower ability to transport the coarse and middle sediments. So the coarse and middle sediment must be reduced in the sediments.4. The numerical results show that if the quantities of sediments can be reduced to 42. 6%, the equilibrium of scour and deposit of sediments will be readied in the Lower Yellow River

本文从数学模型入手,探讨黄河下游在多年平均来水来沙条件下,泥沙输移与泥沙淤积的特性,得出黄河下游泥沙沿程淤积分布不均匀主要是由于粗沙、中沙沿程淤积不均匀造成的,如果使来沙减少42.6%,黄河下游可望达到冲淤平衡。

 
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