双导堤平面布置不宜呈突然扩大或收缩状，堤顶高程宜与中潮位一致。

In the plane layout of double dikes, the sudden expansion or contraction should be avoided. The elevation of the top of the dike should be identical with middle tide level.

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坝顶高程由水库静水位加波浪爬高及安全超高决定。坝顶在静水位以上的超高按下式计算。

The dam crest height is determined based on static water level, wave run-up, and freeboard. The freeboard is calculated according to the following formula.

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其次拟定坝的基本尺寸，包括坝坡、坝顶高程、坝顶宽度以及防渗体及排水设备、护坡等的尺寸，使之满足土石坝的工作要求。

Then, you can decide the basic sizes, including those of slope, crest el, crest width, anti-seepage, drainage, protecting slope, and etc.

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