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首页> 外文期刊>E3S Web of Conferences >Numerical study on reservoir sediment management through adding excavated sediment downstream of dams in Japan
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Numerical study on reservoir sediment management through adding excavated sediment downstream of dams in Japan

机译：日本在大坝下游增加挖出的泥沙来管理水库泥沙的数值研究

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Dam related issues have become preoccupying, with raising concerns about detrimental environmental impacts and sedimentation in reservoirs. Reduction of the Ayu-fish production is due to increasing turbidity and decreasing coarse sediment supply by dams in the Tenryu River, Japan. The paper summarizes various case studies on excavated sediment supply in Japan and a case of numerical study to evaluate the effect of the supplied sediment on the spawning redds of Ayu-fish in the Tenryu River. Results of numerical simulations show that under the present management scheme of non-supplied sediment from the upstream dams, suitable spawning redds are formed on sandbars at the confluence instead of riffles. However, field surveys indicate that riffles with newly deposited sediment are more suitable for fish spawning.
机译：大坝相关问题已成为人们关注的焦点，引起了人们对有害的环境影响和水库沉积的担忧。 Ayu鱼产量的减少是由于日本天龙河水坝的浊度增加和粗泥沙供应减少所致。本文总结了日本关于挖掘的泥沙供应的各种案例研究，以及一个数值研究的案例，以评估所供应的泥沙对天龙河中阿育鱼产卵赤潮的影响。数值模拟结果表明，在目前上游大坝未补给泥沙的治理方案下，在汇合处的沙洲上形成了合适的产卵冲积物，而不是浅滩。但是，实地调查表明，带有新沉积沉积物的浅滩更适合鱼类产卵。

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