Article Dans Une Revue Hydrological Sciences Journal Année : 2025

Multifractal comparison of rainfall measurement with the help of a disdrometer and a mini vertically pointing Doppler radar

Résumé

Local rainfall measurements include a wide range of methods with different concepts and assumptions. Understanding the differences enables researchers to determine the most reliable device for each rain condition. Here, we compare two such devices: Parsivel 2 (an optical disdrometer by OTT) and mini Doppler radar (part of the mini Meteorological Station by Thies). The performance assessment followed two foci: evaluating the scaling features using the framework of universal multifractals (UMs), and analysing the influence of physical parameters (drop size, wind velocity and rainfall rate). The devices were mounted on a meteorological mast, in Pays d’Othe wind farm, 110 km southeast of Paris. The mini Doppler radar returned very low rain measurements during conditions with bigger drops, and showed non-detection in light rain involving heavy wind. UM analysis revealed similar scaling behaviour for both devices, which extended to finer scales of mini Doppler radar data until 4 s beyond which white noise was detected.

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hal-05213530 , version 1 (18-08-2025)

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Mateus Seppe Silva, Rodrigo Vieira Casanova Monteiro, Jerry Jose, Auguste Gires, Igor Paz, et al.. Multifractal comparison of rainfall measurement with the help of a disdrometer and a mini vertically pointing Doppler radar. Hydrological Sciences Journal, 2025, 70 (7), pp.1072-1090. ⟨10.1080/02626667.2025.2464948⟩. ⟨hal-05213530⟩
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