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Studies on the variability of the water and material cycle in the forest

Research Project

Project/Area Number 08454126
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

KOBAYASHI Daiji  Institute of Low Temperature Science, Hokkaido University, Pro., 低温科学研究所, 教授 (30001655)

Co-Investigator(Kenkyū-buntansha) TANAKA Yumiko  Experimental Forest, Hokkaido University, Edu.Stuff, 農学部・附属演習林, 教務職員 (60221397)
KURASHIGE Yoshimasa  Graduate School of Environmental Earth Science, Hokkaido University, Inst., 大学院・地球環境科学研究科, 助手 (20241383)
TACHIBANA Harukuni  Graduate School of Engineering, Hokkaido University, Asso.Pro., 大学院・工学研究科, 助教授 (90002021)
URANO Shin-ichi  Graduate School of Agriculture, Hokkaido University, Pro., 農学部, 教授 (40096780)
ISHII Yoshiyuki  Institute of Low Temperature Science, Hokkaido University, Inst., 低温科学研究所, 助手 (40222955)
石川 信敬  北海道大学, 低温科学研究所, 助教授 (70002277)
児玉 裕二  北海道大学, 低温科学研究所, 助手 (70186708)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥6,900,000 (Direct Cost: ¥6,900,000)
Fiscal Year 1998: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1997: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1996: ¥3,800,000 (Direct Cost: ¥3,800,000)
KeywordsBoreal Forest / Water, Energy and Material Cycle / Forest Evapotraspiration / Streamflow Generation / Chemical Constituent / Suspended Sediment / Nutrient / Variability / 無機イオン / 水文気象 / 融雪熱収支 / 森林流域の水循環 / 流域熱収支 / 流域土砂生産
Research Abstract

The purpose of this study is to clarify the variability of the water, energy and material cycle in the forested basin, specially in the boreal forest basin. Our findings are summarized as follows :
There are three main results in the forested (sparse mixed-wood) mountainous basin in northern Hokkaido. That is, 1) stream temperatures during the recession flow period were similar to the soil temperature at 1.8 m below the land surface, suggesting that subsurface water contributions to streamflow are derived from this depth ; 2) the solid precipitation accounted for 53% of the annual precipitation and snowmelt runoff accounted for 45% of the annual runoff ; and 3) a sediment supply to the river-bed sediment was most likely to be occurred during the mid-snowmelt season, and active stirring-up of river-bed fines from the newly supplied sediment formed the clear peak of the suspended sediment concentration in mid-snowmelt season.
In a quaternary volcanic ash watershed in the northern temperate … More forest zone, the old water contributed the stormflow more than 80% even in a 200mm/48hours-rainfall event. This result was derived from the standard two-component hydrograph separation approach for the silica concentration. As much as 80% of peak runoff suggests that new water displacement with soil wa* occurred immediately during the event.
To understand the runoff characteristics of the nutrient loads from the forest basin, water quality of the four forest streams whose basins are contiguous to each other was observed simultaneously. The principle component analysis of the water quality data of the four streams suggested that the main factors characterizing the water quality of the forest streams are the condition of surface soil layer and the degree of streamflow variation.
To clarify the hydrological characteristics of the forest watershed in cold snowy region, the water balance of Lake Toya and the runoff from its watershed were studied for last 15 years. The stream inflow in the snowmelt season was 20 to 30% of the annual total discharge from the watershed. This high flow rate contributes to maintain the high lake water level in the summer. Less

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] 橘 治国: "集水域の環境と河川水質" 北海道土壌肥料研究通信. 43. 31-42 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tanaka, Y., Machimura, T., Okada, K. and Nakai, T: "Seasonal variations in turbulence spectra above and within a deciduous rorest." Journal of Agricultural Meteorology. 52. 509-512 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kobayashi, D., Ishii, Y. and Kodama, Y.: "Stream temperature, specific conductance and runoff process in mountain watersheds." Hydrological Processes. 12in press. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ishikawa, N., Nakabayashi, H. , Ishii, Y. and Kodama, Y.: "Contributions of snow to the annual water balance in Moshiri watershed, northern Hokkaido, Japan." Nordic Hydrology. 29(4/5). 347-360 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kurashige, Y.: "Process-based estimation of suspended-sediment concentration during the thaw season in a small neadwater basin." IAHS Publ.249. 415-422 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 山田俊郎、大江史恵、清水達雄、橘治国: "森林集水域からの栄養塩負荷流出とその特性に関する比較研究" 環境工学研究論文集. 35. 85-93 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tachibana, H.: "Environment and stream water quality of the watershed" Newsletters of the Hokkaido Fertilizer Research. 43. 31-42 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tanaka, Y., Machimura, T., Okada, K.and Nakai, T.: "Seasonal variations in turbulence spectra above and within a leciduous forest" Journal of Agricultural Meteorology. 92. 509-512 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kobayashi, D., Ishii, Y.and Kodama, Y.: "Stream temperature, specific conductance and runoff process in nountain watersheds." Hydrological Processes. 12, (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ishikawa, N.Nakabayashi, H.Ishii, Y.and Kodama, Y.: "Contributions of snow to the annual water balance in Moshiri vatershed, northern Hokkaido, Japan" Nordic Hydrology. 29 (4/5). 347-360 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kurashige, Y.: "Process-based estimation of suspended-sediment concentration during the thaw season in a small headwater basin." IAHS Publ.249. 415-422 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yamada, T., Oe, F., Shimizu, T.and Tachibana, H.: "A comparison of the runoff characeristics of nutrient loads from forest basins." Environmental Engineering Research. 35. 85-93 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 橘 治国: "集水域の環境と河川水質" 北海道土壌肥料研究通信. 43. 31-42 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tanaka, Y., Machimura, T., Okada, K. and Nakai, T.: "Seasonal variations in turbulence spectra above and within a deciduous forest." Journal of Agricultural Meteorology. 52. 509-512 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kobayashi, D., Ishii, Y. and Kodama, Y.: "Stream temperature, specific conductance and runoff process in mountain watersheds." Hydrological Processes. 12. in press (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Ishikawa, N., Nakabayashi, H., Ishii, Y. and Kodama, Y.: "Contributions of snow to the annual water balance in Moshiri watershed, northern Hokkaido, Japan." Nordic Hydrology. 29(4/5). 347-360 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kurashige, Y.: "Process-based estimation of suspended-sediment concentration during the thaw season in a small headwater basin." IAHS Publ.249. 415-422 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 山田俊郎、大江史恵、清水達雄、橘治国: "森林集水域からの栄養塩負荷流出とその特性に関する比較研究" 環境工学研究論文集. 35. 85-93 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 山田俊郎、大江史恵、中野哲哉、橘 治国: "森林集水域からの水質成分流出特性の比較" 土木学会第51回年次学術講演会(VII). 358-359 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] Ishikawa,N.et al.: "Contributions of snow to the annual water balance in Moshiri watershed, Northern Hokkaido,Japan." Proceedings of the Northern Reseaech Basins. 11. 108-123 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Tanaka,Y.: "Evaporation and bulk Transfer Coefficients on a Forest Floor During times of Leaf-shedding." Journal of Agricultural Meterorology. 53. (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kurashige,Y.: "Process-based estimation of suspended-sediment concentration during thaw season in a small headwater basin." IAHS Publ.(in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Ishikawa,N.et al.: "Characteristics of the water balance of the Moshiri experimental watershed." Annals of Glaciology. (in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 上島菜美子・倉茂好匡et al.: "酪農草地流域と森林流域における栄養塩流出" 北海道大学農学部附属演習林研究報告. (印刷中). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kurashige, Y.: "Topographical change in a channel bed after habitat improvement" Jpn.Jour.Limnol.57. 137-197 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kobayashi, D.: "An outline of Russo-Japanese joint glacier research project in Kamchatka, 1996" Bul.Glacier Res.15. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Ishikawa, N.: "Acidity variations along hydrologic processes of snow deposit, snowmelt and runoff" Proceedings of the International Symposium of FPEI. (in press). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Ishikawa, N.: "Characteristics of the water balance of the Moshiri Experimental watershed" Annals of Glaciology. 25 (in press). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tanaka, Y.: "Seasonal variations in the turbulence spectra above and within a deciduous forest" Proceedings of the International Sumposium of FPEI. (in press). (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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