Modeling of rainfall-runoff and solute transport processes in headwater catchments using multi-tracer approach.

2007 Fiscal Year Final Research Report Summary

• Project/Area Number: 17540409
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: University of Tsukuba
• Principal Investigator: TSUJIMURA Maki University of Tsukuba, Graduate School of Life and Environmental Sciences, Associate professor (10273301)
• Co-Investigator(Kenkyū-buntansha): SHIMADA Jun Kumamoto University, Faculty of Science, professor (80206169)
• Project Period (FY): 2005 – 2007
• Keywords: Rainfall-Runoff / Bedrock Groundwater / Dating of groundwater / Isotope Tracer

Research Abstract

The purpose of this research is to model the hydrological processes in a small catchment underlain by volcanic rock approached by multi-tracer technique using ^2H, ^<18>O, CFCs and inorganic constituents. Especially, the present study focused on establishment of analytical and modeling scheme to evaluate the age of groundwater and spring water using CFCs as a tracer.
The analytical system including a preparation line and gas chromatograph with ECD was established, and evaluation of analytical error was completed. The discharge in the springs and the groundwater level in the boreholes were monitored, and the spring water and the groundwater were sampled in January, July and November 2007. The intercomparison among piston flow model, dispersion model and exponential model was performed to discuss the age of spring and ground waters in the catchment.
The concentration of CFCs in the spring and ground waters showed a higher value in the upper stream region and a lower value in the mid -streamregion throughout the seasons. The piston and dispersion models produced good results of age in the upper stream region, and the exponential model showed the best performance for the dating in the mid-stream region. The ages of spring and ground waters ranged from 10 to 20 years in the upper stream region, 15 to 40 years in the mid-stream region, and 30 to 70 years in the coastal (down stream) region. The estimated groundwater flow system by these models agreed well with the spatial distribution of observed hydraulic head and solute concentration in the groundwater.

Research Products

• [Journal Article] Temporal variation of δ^<13>C of larch leaves from a montane boreal forest in Mongolia (2007)
  • Author(s): Li, S. G., Tsujimura, M., Sugimoto, A., Davaa, G., Oyunbaatar, D., Sugita,M.
  • Journal Title: Trees 21 Pages: 479-490
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Water sources in semi-arid Northeast Asia as revealed by field observations and isotope transport model (2007)
  • Author(s): Sato, T., Tsujimura, M., Yamanaka, T., Iwasaki, H., Sugimoto, A., Sugita, M., Kimura, F., Davaa, G., and Oyunbaatar, D.
  • Journal Title: Journal of Geophysical Research 112 Pages: D17112
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Stable isotopic and geochemical characteristics of groundwater in Kherlen River basin, a semi-arid region in eastern Mongolia (2007)
  • Author(s): Tsujimura, M., Abe, Y., Tanaka, T., Shimada, J., Higuchi, S., Yamanaka, T., Davaa, G. and Oyunbaatar, D.
  • Journal Title: Journal of Hydrology 333 Pages: 47-57
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Runoff generation mechanisms in high-relief mountainous watersheds with different underlying geology (2006)
  • Author(s): Onda, Y., Tsujimura, M., Fujihara, J. and Ito, J.
  • Journal Title: Journal of Hydrology 331 Pages: 659-673
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] The role of Horton overland flow in rainfall-runoff process in an unchanneled catchment covered by unmanaged Hinoki plantation (2006)
  • Author(s): Tsujimura, M., Onda, Y., Hrada, D.
  • Journal Title: Japan Society of Hydrology and Water Resources 19-1 Pages: 17-24
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Determining the criteria rainfall for debris flow warning and evacuation by rainfall-runoff response (2006)
  • Author(s): Onda, Y., Tsujimura, M., Tanaka, T., Sasaki, K., Mizuyama, T., Uchida, T., Tainaka, O., Tanaka, H.,
  • Journal Title: Journal of the Japan Society of Erosion Control Engineering 58-5 Pages: 13-17
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Seasonal variation in oxygen isotope composition of waters for a montane larch forest in Mongolia (2006)
  • Author(s): Li, S. G., Tsujimura, M., Sugimoto, A., Sasaki, L., Yamanaka, T., Davaa, G., Oyunbaatar, D. and Sugita, M.
  • Journal Title: Trees 20-1 Pages: 122-130
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Methods for measuring infiltration rate in forest floor in Hinoki plantations (2005)
  • Author(s): Onda, Y., Tsujimura, M., Nonoda, T., Takenaka, C.
  • Journal Title: Japan Society of Hydrology and Water Resources 18-6 Pages: 688-694
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Defining hydrochemical evolution of streamflow through flowpath dynamics in Kawakami headwater catchment, central Japan (2005)
  • Author(s): Subagyono, K, Tanaka, T., Hamada, Y. and Tsujimura, M.
  • Journal Title: Hydrological Processes 19 Pages: 1938-1965
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Age Dating of Groundwater Using CFCs as Tracer in Some Suburban Regions, Japan. (2007)
  • Author(s): Tsujimura, M., Ohta, K., et. al.
  • Organizer: 4th Annual Meeting of Asia Oceania Geosciences Society
  • Place of Presentation: Thailand
  • Year and Date: 20070800
  • Description: 「研究成果報告書概要(欧文)」より