淤泥堆积抬高河床，不仅减少大坝使用寿命，而且增加洪水泛滥的可能性。
The resulting silt raises the level of the Yangtze riverbed, not only reducing the life of the dam, but also worsening the risk of floods.
发生这些异常现象的根本原因是，本次洪水的含沙量大以及近几年河道淤积严重、河床明显抬高。
The basic reason of these abnormal phenomenas is caused by hyper-sediment concentration, severe deposition of the channel and obviously increased the river bed.
第一，过度砍伐引起的河流上游的侵蚀，第二，严重的泥沙淤积抬高了主干道的河床。
First, erosion resulting from excessive deforestation in the upper reaches of the river. And second, heavy silting which raised the riverbed in the main channel.
只有其真正达到了“堤防不决口，河道不断流，水质不超标，河床不抬高”的四项标准，黄河才具有巨大的效用价值。
Only does it achieve four standards - "embankment not burst, watercourse not breakage, water quality not beyond standard, riverbed not run-up", the Yellow river has being enormous avail value.
杀死的犯人的尸首扔进河中，首尾相叠，堵住了河水的流动，抬高了河床的水位。
The bodies of those who had been killed were thrown into the river, blocking the flow of the water and raising the water level.
现在，泥沙淤积抬高了中游河床，使得以前得到保护的低地现在暴露在每年洪季漫溢的威胁之下。
The sedimentation has now elevated the river bed in the middle reach to such an extent that the formerly protected lowlands are now exposed to the threat of overflow every flood season.
现在，泥沙淤积抬高了中游河床，使得以前得到保护的低地现在暴露在每年洪季漫溢的威胁之下。
The sedimentation has now elevated the river bed in the middle reach to such an extent that the formerly protected lowlands are now exposed to the threat of overflow every flood season.
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