They measured the depth of snow drifts.

他们测量了峰顶的覆雪深度。

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Snow fell to a depth of three chi.

雪下3尺深。

《新英汉大辞典》

A surplus allows snow to accumulate and for the pressure of snow accumulated over the years to transform buried snow into glacial ice with a depth great enough for the ice to flow.

剩余的积雪能够让雪集成堆，且由于多年的积雪形成的压力，剩余的积雪能够让掩埋的雪变成冰川冰，这些冰川冰的厚度足以使冰块流动。

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Jersey's Met Department said the depth of snow was measured at 09:00 GMT and it was 5.5 inches (14cm).

BBC: Jersey snow: Schools to close for a third day

Using satellite-based snow melt maps supplied by the European Space Agency (ESA) backed program Polar View, herders are able to view the depth of snow and judge where the best foraging spots are to take their reindeer.

CNN: Snow maps from space aid reindeer herders