1·The asymptotic solutions to the problem of a spur dike are obtained.
然后求出了丁坝问题的摄动解。
2·Local scour and deposition around submerged spur dike was numerically simulated in the present paper.
本文对洪水条件丁坝近体的 局部冲淤进行了三维数值模拟。
3·Several basic characteristics on pressure head distribution at the surface of spur dike are described.
论述了坝体周围动水压力分布的若干基本材性。
4·The renovation project with smooth revetment when necessary can also adopt a short spur dike revetment.
湖岸整治工程多用平顺护岸必要时也可采用短丁坝护岸。
5·Local directional change of the flow field in the vicinity of spur dike would result in local scouring of spur dike.
丁坝(群)附近的局部流场变化是引起丁坝局部冲刷的根本原因。
6·Three kinds of permeable pile dikes with different seepage rate are tested, and effect of flow control is basically the same with the spur dike.
试验的三种透水率桩坝，其导流效果与实体丁坝群的基本相同，并未因部分透水及形态不同而使其控导作用明显减弱。
7·Three kinds of permeable pile dikes with different seepage rate are tested, and effect of flow control is basically the same with the spur dike,.
试验的三种透水率桩坝，其导流效果与实体丁坝群的基本相同，并未因部分透水及形态不同而使其控导作用明显减弱。
8·The formation mechanism of transition part shoal, function and arrangement of spur dike and training dike are expounded and living examples are given for explanation.
对过渡段浅滩形成的机理，丁、顺坝的作用和布置等方面进行论述，并以整治实例予以说明。
9·It is of great importance for the design of channel regulation structure to explore the effect of spur dikes on flow, and to study the flow structure near the spur dike.
研究丁坝对水流的影响规律以及丁坝附近水流的流动结构对于航道整治建筑物的设计具有十分重要的意义。
10·Then the turbulence characteristics of the spur dike head and backflow region and the distributions law of flow and turbulence kinetic energy around spur dike are obtained in this paper.
利用三维超声学多普勒流速仪对丁坝坝头附近水流和回流区水流的紊动特性进行了系统的观测和分析，得到了丁坝坝头和回流区的水流特性及紊动动能的分布规律。