Effect of frequent storms on nutrient discharge in a mountainous coastal catchment, western Japan

Shin Ichi Onodera, Misa Sawano, Mitsuyo Saito, Hidehiro Takahashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

In order to forecast the variation of nutrient load with climate change, the long-term change in rainfall and its effect on river runoff in a study catchment were investigated and related to change in nutrient discharge to the ocean. In the study area there has been a decreasing rainfall trend for 40 years but the frequency of large rainfall events has remained constant. The annual runoff decreased by 60 mm in the last 40 years, but large annual runoff amounts were observed in years with large rainfall events. The nutrient discharge also reflected the rainfall and runoff trends. DN load has increased in the long term, while in drought years DP load has increased, reflecting the dominant groundwater contribution with significantly higher DP concen-trations in such conditions.

Original languageEnglish
Title of host publicationIAHS-AISH Publication - Water Quality and Sediment Behaviour of the Future
Subtitle of host publicationPredictions for the 21st Century
Pages108-116
Number of pages9
Edition314
Publication statusPublished - Dec 1 2007
Externally publishedYes
EventInternational Symposium: Water Quality and Sediment Behaviour of the Future: Predictions for the 21st Century - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG) - Perugia, Italy
Duration: Jul 11 2007Jul 13 2007

Publication series

NameIAHS-AISH Publication
Number314
ISSN (Print)0144-7815

Other

OtherInternational Symposium: Water Quality and Sediment Behaviour of the Future: Predictions for the 21st Century - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG)
CountryItaly
CityPerugia
Period7/11/077/13/07

Keywords

  • Groundwater
  • Heavy storm event
  • Nutrient discharge
  • River

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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  • Cite this

    Onodera, S. I., Sawano, M., Saito, M., & Takahashi, H. (2007). Effect of frequent storms on nutrient discharge in a mountainous coastal catchment, western Japan. In IAHS-AISH Publication - Water Quality and Sediment Behaviour of the Future: Predictions for the 21st Century (314 ed., pp. 108-116). (IAHS-AISH Publication; No. 314).