Determination of the energy characteristics of rainfall using the optical precipitation gauge
V.V. Kal’chikhin, A.A. Kobzev, A.A. Tikhomirov
Institute of Monitoring of Climatic and Ecological Systems of the Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
Keywords: precipitation, rainfall intensity, rainfall kinetic energy, rain gage, disdrometer, soil erosion
Abstract
A brief overview of tasks that require information about the energy characteristics of rains, as well as methods for obtaining this information, is given. A technique is described for determining the kinetic energy transferred by hydrometeors based on the microstructural characteristics of precipitation obtained using the optical precipitation gauge OPTIOS. The methodology usage is illustrated with measurement data of the heavy rainfall that fell in Tomsk on July 22, 2023. The influence of various microstructural parameters on the amount of kinetic energy brought by raindrops to the underlying surface is analyzed. The comparison is made with the values obtained by simplified methods. It is concluded that the capabilities of the optical precipitation gauge allow it to be successfully used in solving tasks that require an accurate assessment of the energy characteristics of rainfall.
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