Chemical characteristics of rainwater at Motooka, Fukuoka

Rie Unoki, Ryuichi Itoi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Rainwater was collected with bulk samplers for two years from September 1998 to June 2000 at Motooka, Fukuoka, where a new campus of Kyushu University is under construction. Two rainwater samplers of open-air type for bulk sampling were set in the area. The rainwater stored in the tank was collected and chemically analyzed at an interval of two weeks during this monitoring period. Lowest pH of 4.0 was observed once, and relatively low PH, lower than the average pH of rainwater in Japan (pH 4.7), were measured 17 times out of 45 times in total. Concentrations of NO3 - and non-sea salt (nss) SO4 2- showed seasonal variations such that higher values during wintertime compared with other three seasons. Deposited amounts of these ions were calculated to be relatively constant for NO3 - when precipitation for one observation period, two weeks, exceeded 40 to 50 mm, but varied in a wide range for SO4 2- regardless of precipitation.

Original languageEnglish
Pages (from-to)151-160
Number of pages10
JournalMemoirs of the Faculty of Engineering, Kyushu University
Volume63
Issue number3
Publication statusPublished - Sep 2003
Externally publishedYes

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rainwater
Salts
Ions
Sampling
Monitoring
sampler
seasonal variation
salt
chemical
ion
sampling
monitoring
Salt
Seasonal variation
Japan

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)
  • Management of Technology and Innovation
  • Atmospheric Science
  • Energy(all)
  • Process Chemistry and Technology

Cite this

Chemical characteristics of rainwater at Motooka, Fukuoka. / Unoki, Rie; Itoi, Ryuichi.

In: Memoirs of the Faculty of Engineering, Kyushu University, Vol. 63, No. 3, 09.2003, p. 151-160.

Research output: Contribution to journalArticle

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