Tradeoff Between Hot spring Use and River Ecosystem: The Case of Beppu City, Oita Prefecture, Japan

  • Makoto Yamada
  • Hisami Honda
  • Taketoshi Mishima
  • Shinji Ohsawa
  • Jun Shoji
Chapter
Part of the Global Environmental Studies book series (GENVST)

Abstract

In Hirata River at Beppu, Oita prefecture, the inflow of hot spring drainage into the rivers increases the Nile tilapia, an alien species. It is a tradeoff between the hot spring use and river ecosystem. In order to understand details of the mechanisms connecting hot spring use and ecosystem, we investigated the river water quality and the water temperature from the upper reaches to the river mouth in the Hirata River. The results show that the hot spring drainage flowing in a specific section affects the estuary area. Additionally, it is revealed that the current average water temperature of hot spring drainage is very good condition for Nile tilapia in the estuary area. It is suggested that the tradeoffs between the hot spring use and the ecosystems can be resolved by suppressing high-temperature unused hot spring drainage, and/or by collecting hot spring drainage and reduce its average temperature further by using its thermal energy more extensively.

Keywords

Hot spring drainage Hot spring use River ecosystem Tradeoff 

References

  1. FAO (2015) FAO fisheries & aquaculture – cultured aquatic species information programme – Oreochromis niloticus (Linnaeus, 1758) http://www.fao.org/fishery/culturedspecies/Oreochromis_niloticus/en
  2. Hiramatsu T et al (1994) Aquatic life in freshwater in the Beppu region. Nat Beppu, pp 323–344. (in Japanese)Google Scholar
  3. Ministry of the Environment (2015) List of alien species that might damage the ecosystem of our country. http://www.env.go.jp/press/files/jp/26594.pdf. (in Japanese)
  4. Ohsawa S et al (2007) The inflow of useful metal elements into rivers: basic research and investigation of untapped hot spring resources. Oita Prefect Hot Spring Res Soc 58:21–30. (in Japanese)Google Scholar
  5. Yamada M et al (2017) Hot spring drainage impact on fish communities around temperate estuaries in southwestern Japan. J Hydrol Reg Stud 11:69–83.  https://doi.org/10.1016/j.ejrh.2015.12.060 CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Makoto Yamada
    • 1
  • Hisami Honda
    • 2
  • Taketoshi Mishima
    • 3
  • Shinji Ohsawa
    • 4
  • Jun Shoji
    • 5
  1. 1.Faculty of EconomicsRyukoku UniversityKyotoJapan
  2. 2.Research Institute for Humanity and NatureKyotoJapan
  3. 3.Institute for Geothermal Sciences, Graduate School of ScienceKyoto UniversityKyotoJapan
  4. 4.Beppu Geothermal Research Laboratory, Institute for Geothermal Sciences, Graduate School of ScienceKyoto UniversityBeppuJapan
  5. 5.Costal EcologyHiroshima UniversityHigashi-hiroshimaJapan

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