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Title: Monitoring the rainfall intensity at two active volcanoes in Indonesia and Japan by small-compact X-band radars
Authors: Syarifuddin, Magfira
Indri Hapsari, Ratih
Legono, Djoko
Oishi, Satoru
Ganara Mawanda, Hanggar
Aisyah, Nurnaning
Shimomura, Makoto
Nakamichi, Haruhisa  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-5501-0965 (unconfirmed)
Iguchi, Masato  kyouindb  KAKEN_id
Author's alias: 大石, 哲
下村, 誠
中道, 治久
井口, 正人
Keywords: X-band radar
dual polarimetry
rainfall intensity estimate
CAPPI interpolation
Issue Date: 2020
Publisher: IOP Publishing
Journal title: IOP Conference Series: Earth and Environmental Science
Volume: 437
Thesis number: 012040
Abstract: Since 2015, collaborative research conducted by Indonesian and Japan scientists has initiated the installation of small X-band Multi-Parameter (X-MP) radars to mitigate the occurrence of rainfall-induced lahar in three active volcanoes in Indonesia and Japan: Merapi, Sinabung, and Sakurajima. This paper discusses the technical aspects of data acquisition, processing, and performance of the X-MP radar at the Merapi and Sakurajima volcanoes by comparing the estimated rainfall intensity acquired by the radar to three empirical radar-rainfall algorithms. The algorithms are based on radar reflectivity factor (ZHH), specific differential phase shift (KDP), and differential reflectivity (ZDR). A new method of Constant Altitude Plan Position Indicator (CAPPI) interpolation by linear regression is also proposed for a more efficient computation. The first algorithm by Marshall-Palmer, which relies on ZHH, gave the lowest average and maximum rainfall values compared with the other algorithms for all rainfall event cases. On the other hand, the other two algorithms, which involve the MP of radar by Bringi and Chandrasekar and Park et al., gave closer rainfall intensity values with the estimated rainfall intensity acquired by the X-MP radar. These three rain rates give a closer temporal fluctuation when they are compared to the rain gauge-based rainfall intensity.
Description: The 3rd International Conference of Water Resources Development and Environmental Protection 12-13 October 2019, Malang
Rights: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
URI: http://hdl.handle.net/2433/253578
DOI(Published Version): 10.1088/1755-1315/437/1/012040
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