Analysis of the relationship between the kinetic energy and intensity of rainfall in Daejeon, Korea

摘要: Abstract The kinetic energy and momentum of rainfall are widely used as erosivity indicators for estimating soil detachment (erosion) induced by the impact raindrops. Because direct measurements force or on ground surfaces not available, many empirical relationships have been derived to link intensity (I) rainfall, factor that has most control over erosion is readily accessible. This study considered three indices: expenditure ( KE time , J m −2  h −1 ), content mm  mm M kg m s  m  s N m ). between these indices ) were established fitting an existing functional model based number drops size terminal velocity made from January 2010 July 2011 using a laser optical disdrometer in Daejeon City, Korea. best fit relationship was obtained with power law -I M−I exponential - I Validation results two different events indicated good performance equations, similar distribution observed data power-law curve fitting. However, index produced much lower uncertainty determined measured when equipment exposed situ changeable conditions. Therefore, we suggest suitable equation prediction erosivity.