《水利类专业英语.docxVIP

4.Because of the enormous damage or potential damage caused by a flood of the magnitude that occurs once in a hundred years or less, stream gaging records of 10, 20, or 30 years are inadequate, although of some use, in planning flood control projects or for the spillway design of any large dam.由于量级在100年一遇或者更罕见的洪水引起的巨大破坏或潜在破坏，在洪水控制工程的规划或任意大型大坝的溢洪道的设计中，10年、20年或30年的水流测量记录尽管有些用途，但还是不够的。5. The foundation, including abutments, should be of rock or consolidated materials sufficiently strong to support the structure and they must be watertight or so nearly so that excess leakage can be prevented by sealing any cracks or fissures in the foundation with a grouting material or closing the leakage paths by placing a blanket of impervious material in the reservoir area upstream from the dam site.地基包括坝肩，是由岩石或坚固的材料构成，足以承受结构的荷载，并且必须防水，或者能通过灌浆材料封堵地基中的裂缝或裂隙，或在坝址上游库区铺一层不透水材料来封闭渗漏通道，从而防止过量的渗漏，做到接近防水。 6. An adjustment of capacity of a storage reservoir may prove to be necessary; this, or any new design data may disclose the need of changing the axis location of the dam even though the reservoir site remain the same.对水库的储水量调整可能是必要的，或者说，即使水库地址没变，依据新的设计数据，有必要对坝轴线位置进行调整。 7. This is determined by the plan formulation studies in which evaluation are made to test whether the inclusion of more than one project function is economically justified.这是由规划制定研究所决定的，对此工程包含一个以上功能在经济上是否合理作出评价。8. Consideration will also have been given to whether one site, or set of sites, would have important and possibly overriding advantages or disadvantages to the next-best available alternative from environmental impact standpoints.从环境影响的立场，我们也必须考虑到，是否一个坝址或一系列坝址，有比仅次于最好的可选坝址有更重要的和可能首要的利弊。 9. The amounts of active storage capacity will have been selected by the plan formulation procedures whereby costs and accomplishments are estimated for a range of reservoir sizes, benefit values assigned to the different kind and variable amounts of accomplishments, and comparative economic evaluations made for the range of reservo