### Abstract

Original language | English |
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Title of host publication | Proceedings of a symposium held in Exeter, UK, april 2011 |

Publisher | IAHS |

Pages | 141-146 |

Publication status | Published - 2012 |

### Publication series

Name | IAHS publication |
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Number | 351 |

ISSN (Print) | 0144-7815 |

### Fingerprint

### Cite this

*Proceedings of a symposium held in Exeter, UK, april 2011*(pp. 141-146). (IAHS publication; No. 351). IAHS.

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*Proceedings of a symposium held in Exeter, UK, april 2011.*IAHS publication, no. 351, IAHS, pp. 141-146.

**Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate.** / Yu, N.; Boudevillain, B.; Hazenberg, P.; Uijlenhoet, R.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

TY - GEN

T1 - Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate

AU - Yu, N.

AU - Boudevillain, B.

AU - Hazenberg, P.

AU - Uijlenhoet, R.

PY - 2012

Y1 - 2012

N2 - This study offers an approach to estimate the rainfall kinetic energy (KE) by rain intensity (I) and radar reflectivity factor (Z) separately, or jointly, based on the one- or two-moment scaled raindrop size distribution (DSD) formulation, which contains (a) I and/or Z observations, (b) dimensionless probability density function (pdf) and (c) some intrinsic parameters. The key point of this formulation is to explain all variability of the DSD by the evolution of observations, hence the pdf and intrinsic parameters are considered as constants. A robust method is proposed to estimate the climatic values for these parameters, and our 28-month DSD data are used to test this estimation process. The results show that three relationships (KE-I, KE-Z and KE-IZ) which link the observations (I and/or Z) to rainfall kinetic energy (KE) are well established based on the climatic scaled DSD formulation. In particular, the combination of I and Z yields a significant improvement of estimation of KE.

AB - This study offers an approach to estimate the rainfall kinetic energy (KE) by rain intensity (I) and radar reflectivity factor (Z) separately, or jointly, based on the one- or two-moment scaled raindrop size distribution (DSD) formulation, which contains (a) I and/or Z observations, (b) dimensionless probability density function (pdf) and (c) some intrinsic parameters. The key point of this formulation is to explain all variability of the DSD by the evolution of observations, hence the pdf and intrinsic parameters are considered as constants. A robust method is proposed to estimate the climatic values for these parameters, and our 28-month DSD data are used to test this estimation process. The results show that three relationships (KE-I, KE-Z and KE-IZ) which link the observations (I and/or Z) to rainfall kinetic energy (KE) are well established based on the climatic scaled DSD formulation. In particular, the combination of I and Z yields a significant improvement of estimation of KE.

M3 - Conference contribution

T3 - IAHS publication

SP - 141

EP - 146

BT - Proceedings of a symposium held in Exeter, UK, april 2011

PB - IAHS

ER -