Snow pack density measuring device and method

Abstract

The invention discloses a snow pack density measuring device. Convenient and high-precision o measurement of the density of snow packs is achieved. The snow pack density measuring device comprises a plurality of cylinders, a plurality of string rods, a snow shovel, levelling ends, a blade and a weighing instrument; string cylinders are fixedly arranged on the outer surfaces of the cylinders in thedirection of a generatrix of the cylinders, and the string rods penetrate through the string cylinders to fixedly connect the multiple cylinders in a string mode; when the snow shovel is used, the snow shovel is inserted into the bottom of a whole cylinder, accumulated snow in the cylinder and the ground are segmented; when the levelling end is used, the levelling end is pushed into the bottom ofthe cylinder to push the internal accumulated snow upwardly; when the blade is used, the blade is inserted between contacting surfaces of the cylinders to cut the internal accumulated snow apart; theweighing instrument is used for weighing the weight of the cylinders and the weight of the internal accumulated snow; and scales are arranged on the outer surfaces of the cylinders and used for measuring the depth of the accumulated snow and the depths of the snow packs at which the cylinders are located. According to the snow pack density measuring device, the accumulated snow of different depths are directly measured out to perform measurement on the density of the snow packs, pit digging is not needed, and the operation is convenient; and due to the fact that the accumulated snow in the cylinders is not extruded and pressed, the volume and the density of the accumulated snow are maintained to be unchanged, and the measuring precision of the density of snow packs is high.

Description

technical field [0001] The invention relates to the field of scientific research on snow cover, in particular to the measurement of snow layer density at different depths in the scientific data collection of snow cover. Background technique [0002] Snow layer density is an important parameter in snow hydrological models and quantitative remote sensing of snow cover. Therefore, snow density measurement is very important in snow cover scientific research. At present, there are two main types of snow layer density measuring devices, namely Snow Fork snow characteristic analyzer and wedge-shaped snow measuring device. [0003] Snow Fork can measure electrical parameters such as resonance frequency, attenuation and 3-dB bandwidth, and use these measurements to accurately calculate the dielectric constant, and then calculate the snow density through semi-empirical equations. There are at least two problems: 1. The density of the snow layer is converted from a variety of electric...

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Problems solved by technology

There are at least two problems: 1. The density of the snow layer is converted from a variety of electrical parameters, and the transmission error of the measurement results is large; 2. When the humidity of the snow is high and the temperature is low, the error of the measured electrical parameters is large, resulting in The calculated snow layer density is inaccurate; 3. The cost of the instrument is high, and it is not easy to carry in the field in alpine mountainous areas

There are at least two problems: 1. When the snow is excavated, it is not necessarily close to the wedge-shaped snow measuring device, and there is a gap between the two, resulting in a certain error between the volume of the excavated snow and the volume of the wedge-shaped snow measuring device; 2. The snow accumulation When excavated, the snow density changes due to pressure, resulting in inaccurate calculated snow layer density

[0005] In addition, the above two snow layer density measurement devices need to dig pits and vertical sections when using them. The measurement process is time-consuming, labor-intensive and error-prone, and there is an urgent need for simple, high-precision snow layer density measurement devices.

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