英德
有道
百度
谷歌
图片
维基
百科
围坝 [wéi bà]
box dam
- 文摘:以涌潮闻名的钱塘江河口，动力强劲，破坏力极大.回顾钱塘江河口历代治理情况，重点记述1949年以来治理工作的进展，论述60年代提出的钱塘江河口治理规划的指导思想，即缩窄江道，减少进潮量，增大山潮水比值的整治原则.总结整治规划实施过程中治江围涂经验，特别是“以围代坝”和丁坝坝头保护等工程措施.分析钱塘江河口大规模治江围涂后对钱塘江河口潮汐、洪水位、河床以及杭州湾北岸深槽的影响.
Abstract: The Qiantang Estuary with violent hydrodynamic conditions is well known for its tidal bore.The regulation of the estuary in the past,especially the progress since the founding of new China are reviewed.The principles of the regulation and planning of the Qiantang Estuary formulated in 1960s are expounded,i.e.,to narrow the river to reduce the tidal prism,and to increase the ratio of the river flow to tidal discharge.The experience of estuary regulation/reclamation is summarized,especially the engineering measures to protect the groin head and to use polder dykes as sea defense works.Finally,the effect is analyzed of the large-scale constraction/reclamation in the estuary on the tides,flooding high water level,estuary bed and the northern deep waterway in the Hangzhou Bay. - 摘要针对向家坝水电站特殊的自然条件和工程布置特点，其施工导流经过对多个方案进行比较，从施工布置、后期度汛、施工期通航、发电工期等方面考虑，选择了第一期围左岸、第二期围右岸的分期导流方案。
In light of the special natural conditions and project layout characteristics of Xiangjiaba Hydropower Station, a stage diversion scheme with the left bank being closed at the first stage and the right bank closed at the second stage has been selected through comparison of several schemes under the consideration of the aspects such as construction layout, late-stage flood control, navigation during the construction, and the construction period before the commissioning of the first hydropower generating unit.
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