Development of solar-powered rainwater collector and observation of wet deposition fluxes on the mountainside of Mt. Fuji

Takahiro Funakura, Hiroshi Okochi, Toshio Nagoya, Koji Inazu, Yukiya Minami, Yasuhito Igarashi

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    Abstract

    The wet deposition fluxes of acidic substances were observed on the mountainside (1300 m a.s.l.) of Mt. Fuji from July 2005 to November 2006 by a solar-powered automatic rainwater collector, which was developed with emphasis on its being small-size, lightweight, and inexpensive for use in wet deposition monitoring network in mountainous area. The collector is divided into two parts, namely rainwater collection and solar battery system. The former is composed of a capacitance-type rain sensor, an originally designed automatic switching cover, a polycarbonate filter holder (80 mm in diameter), which is equipped with a 47 mm diameter and 1.2 μm pore size membrane filter, a polyethylene bottle, and a polypropylene tube connecting the holder and the bottle. The latter is composed of a 20 watt solar panel, a solar charge controller, and a 12 V lead acid battery. A comparison of the deposition fluxes, estimated by the automatic rainwater collector with those by a filtering-type rainwater collector, indicated that they were free of the influence of dry deposition without a loss of rainfall in the automatic rainwater collector. Rainfall amounts estimated by the automatic rainwater collector corresponded to those observed by a commercially available rain gauge except for winter. Annual wet deposition fluxes of H +, NO 3 -, and SO 4 2- in the mountainside on Mt. Fuji were 58.5, 40.4, and 78.8 meq/m 2/y, respectively.

    Original languageEnglish
    Pages (from-to)805-811
    Number of pages7
    JournalBunseki Kagaku
    Volume56
    Issue number9
    DOIs
    Publication statusPublished - 2007

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    Keywords

    • Acid deposition
    • Mountainous area
    • Rainwater collector
    • Solar battery system

    ASJC Scopus subject areas

    • Analytical Chemistry

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