SU125401A1 - Field rain gauge - Google Patents

Description

Famous field rain gauges that directly measure, without using a special measuring glass, the amount of precipitated liquid precipitates at their installation sites are complex and expensive, excluding their massacre directly on land use of the collective farms and coBXOio; In addition, they require the maintenance of a special subframe, usually measuring twice ;; Day I, the amount of precipitation lost to the ground with the help of a special MejiHoro glass does not provide a study of the power of the varied astteleteness of the rainfall collection on the territory of the farm and: 1 and the state farm, knowledge of which is very important for exploring the time of selective work, the use of differentiated agricultural technology and the most appropriate placement of agricultural crops.

(A leaning rain gauge is free from these drawbacks. It has the appearance of a high cylindrical measuring tube / with an extension in its upper part (see drawing). The Yronka 2 is inserted into the rain gauge, and its receiving slant is about 30 slg. Equal each division is equal to 3 cm of water, which corresponds to 1 mm of e.cho of precipitations ii.iH 10 m (10 tons) of water per hectare. This eliminated the transfer to the layer nln of the amount of precipitation, greatly enhances the processing of observations .

To reduce evaporation of water from a rain gauge (from rain to the next observation period), it is made of a transparent material, such as glass, which facilitates the free passage of short-wave solar radiation and, therefore, reduces heating-water and its evaporation. In addition, due to the small cross-section of the effluent end of the funnel, a no-drop of water from the precipitated rain clogs the funnel, which also drastically cuts off water loss by evaporation. Clear glass makes it easy to read out loose liquid sediments.

Numerous tests of no; iBoro rain gauges in Leningrad, Moscow, Sochi, Batumi, Tbilisi, Beki-Bent (Turkmenistan) and other places have shown that, compared with the precipitation gauge

satisfactory results. Tests of a field rain gauge as a total, carried out in Nemchinozk, showed that the rain during the week retains in itself the amount of water poured in tfedels of accuracy of measurement. This circumstance, along with simplicity and cheapness, makes the field rain gauge especially convenient for atronomes and field foremen, letting them, without daily observation, monitor the increase in the amount of precipitation in their fields. The rain gauge is installed on the main fields of the crop rotation in the spring, after the snow cover disappears, on the boat stand, which can be made of a thin (about 2 cm in diameter) iron pipe, rod or wooden column (thickness, some about 20 cm) and a length of 170-180 cm. In the fall the rain gauge is removed from the floor.

Subject invention

A field rain gauge, consisting of a measuring cup and a funnel, is about and in order to take into account liquid precipitation in the field and reduce the influence of solar radiation on the measurement results, the glass and the funnel are made of a material that is transparent for short-wave solar radiation, and the internal diameter of the funnel's drain channel is such that by virtue of the natural adhesion of water to the glass surface, a prolonged setting of the last) rain is ensured at the exit of the last drop.

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