Snow pillows

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A snow cushion is a sensor for the continuous and automatic measurement of the water equivalent of the snow cover or the weight of the snow cover per m². The use takes place z. B. to determine the snow pressure on flat roofs or for predictions in flood protection.

Measuring principle

The measuring principle of the snow pillow is based on the measurement of the hydrostatic pressure caused by the snow cover . The pressure recorded with a pressure transducer corresponds to the water equivalent or snow weight of the snow cover and is z. B. output as an analog signal.

installation

To ensure exact measurements with the snow cushion, the following requirements must be met. The measuring field must be horizontal, flat, protected from the wind and represent a representative section of the snowpack. Steep slopes, edges of the terrain and large rocks in the immediate vicinity of the measuring point are to be avoided, as snow slides or snow drifts can occur and these influence the measurement result. Larger dimensions of the snow cushion (e.g. 3 × 3 m) prevent the measurement results from being falsified by possible bridging of the snow cover over the snow cushion.