groin head meaning in English
丁坝坝头
丁坝头
Examples
- Silt will deposit there . velocities around groin head are larger than the scour velocity and scour hole may develop in this area . this would affect the stability of spur dikes
受丁坝阻挡，坝田所在的边滩区域流速很小，泥沙在此淤积:而坝头附近流速较大，通常在此区域形成冲刷，影响丁坝的稳定性。 - 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
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