主要型式有棱体排水、贴坡排水、褥垫排水和综合式排水等。

There are drainage prism, drain on embankment slope, blanket drainage and comprehensive drainage.

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贴坡排水层的顶部应高于坝体浸润线的逸出点，超出的高度务使坝体浸润线位于该地区冻结深度以下，且不小于1.5米。

Its top must be higher than dam saturation line's exit point, and the extent exceeded must ensure the saturation line is no less than 1.5 meters below local freezing depth.

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贴坡排水层的底脚处必须设置排水沟或排水体，其深度或厚度应使水面结冰后，排水沟(排水体)的下部仍有足够的排水断面。

At the foot of the drainage on embankment slope, there must be a drain, the depth and thickness of which must guarantee enough draining section when the surface is frozen.

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