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Kinetic Energy Rate of the Rain Drops Based on the Impact Signal Analysis

충격 신호 분석에 기반한 우적의 운동 에너지율

  • Received : 2019.07.10
  • Accepted : 2019.08.15
  • Published : 2019.08.31

Abstract

The erosive potential of precipitation can be evaluated by the kinetic energy transferred to the soil by the impact of the rain drop. A kinetic energy rate of the rain drops was estimated by the disdrometer classifying impact signals. This equation in the form of power presented an adjustment measure between the rain rate and rainfall quantity of 97% and 95% for continental and maritime rains, respectively. The exponent of the power equation, initially, shows no dependence on the type of rainfall. However, the multiplicative factor presented variation, which can be adjusted according to rainfall events. This equation was validated by the coefficient of determination, the average absolute error and the confidence error. The kinetic energy of precipitation, associated to certain types of soil, will allow the determination of the potential of the erosion caused by the rains.

Keywords

Kinetic Energy Rate;Disdrometer;Drop Size Distribution;Erosion;Continental Rainfall

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Fig. 1. Distribution of rainfall drop size according to the origin (maritime or continental) and classes of R (D = Diameter and R = rainfall).

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Fig. 2. Total number of drops (NT) and precipitation rate (R).

Table 1. Static characteristics of rainfall.

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Table 2. Values A and b of the equations. Power for systems of rainfall production of the marine and continental type.

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Table 3. Relative error of the power equation analysis in different classes of rain intensity to determine the approximate value of the kinetic energy rate for the continental type rainfall.

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Table 4. Relative error of the power equation analysis in different classes of rain intensity to determine the approximate value of the kinetic energy rate for the maritime type rainfall.

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Acknowledgement

Supported by : KMIPA

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