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Profile photo of Ronny Berndtsson

Ronny Berndtsson

Professor, Dep Director, MECW Dep Scientific Coordinator

Profile photo of Ronny Berndtsson

Estimation of residence time and catchment area for spring water using radioactive isotope and groundwater flow model

Author

  • Yoshinari Hiroshiro
  • Kenji Jinno
  • Atsushi Tsutsumi
  • Masataka Matsumoto
  • Ronny Berndtsson

Summary, in English

Spring water, however, is often formed in complex geological formations and therefore it is difficult to determine the catchment area contributing to the flow. The Sayanokami spring, located in western part of Fukuoka City, Japan, is such a spring and an important water resource for the local agriculture. In order to better understand the hydrological properties of infiltration and groundwater processes for the spring water, 222Rn and tritium were used as tracers. Results showed that the residence time for the spring water is 10 - 20 years. A groundwater model confirmed these results and the travel time from the catchment border estimated to be about 25 years. Using this information the catchment border and uptake area were estimated. The method can be used to more efficiently determine catchment area and travel time for groundwater and thus to better manage the spring water.

Department/s

  • Division of Water Resources Engineering

Publishing year

2007-03-22

Language

English

Pages

1-9

Publication/Series

Memoirs of the Faculty of Engineering, Kyushu University

Volume

67

Issue

1

Document type

Journal article

Publisher

Kyushu University, Faculty of Science

Topic

  • Oceanography, Hydrology, Water Resources

Keywords

  • Rn
  • Estimation of residence time and catchment area of spring water
  • Groundwater flow model
  • Tritium

Status

Published