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Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 433766
Title Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate
Author(s) Yu, N.; Boudevillain, B.; Hazenberg, P.; Uijlenhoet, R.
Source In: Proceedings of a symposium held in Exeter, UK, april 2011 IAHS (IAHS publication 351) - p. 141 - 146.
Department(s) Hydrology and Quantitative Water Management
WIMEK
Publication type Contribution in proceedings
Publication year 2012
Abstract 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.
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