A bracket can be used, and the bracket can keep both collectors in the same position relative to the protective ring. The height of the bracket can be adjusted at any time, which ensures that the height of the collector remains above the specified ground level (such as when the snow depth changes), and also facilitates the replacement of the collector. The precipitation collector cannot be used in frozen conditions. Under freezing conditions, the evaporation rate is small, and a sediment collector can be used instead of a precipitation collector. In addition, the collection volume is also relatively large.