There are many indexes for glacial test, among them direct and also the most important is ice layer thickness and its varieties.

冰的检测指标有很多，其中最直接也是最重要的就是冰层厚度及其变化。

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This system can still apply extensively in the automatic detection of channel, river, reservoir and lakes ice layer thickness change.

该系统还可广泛应用于渠道、河流、水库和湖泊冰层厚度变化的自动检测中。

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In this image streaks of dark basaltic sand have been carried frombelow the ice layer to form fan-shaped deposits on top of the seasonalice.

在这幅图像中黑色玄武岩沙带被从冰层下面显露出来，在季节性冰盖的顶部形成扇形堆积。

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Above-freezing temperatures also led to overflow along the trail, a potentially dangerous situation where water has pushed up through the ice and refrozen, creating a weak top layer of ice that teams and mushers can break through.

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