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Seasonal variations of water loss due to evapotranspiration in an experimental watershed with various surface conditions

Research Project

Project/Area Number 03455001
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 広領域
Research InstitutionHokkaido University, Institute of Low Temperature Science

Principal Investigator

ISHIKAWA Nobuyoshi  Hokkaido University, Institute Low Temperature Science, Associate Professor, 低温科学研究所, 助教授 (70002277)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Daiji  Hokkaido University, Institute Low Temperature Science, Professor, 低温科学研究所, 教授 (30001655)
MASTUDA Kyo  Hokkaido University, College Experiment Forests, Associate Professor, 農学部・附属演習林, 助教授 (30002075)
SHIRASAWA Kunio  Hokkaido University, Institute Low Temperature Science, Instructor, 低温科学研究所, 助手 (50196622)
ISHII Yoshiyuki  Hokkaido University, Institute Low Temperature Science, Instructor, 低温科学研究所, 助手 (40222955)
KODAMA Yuji  Hokkaido University, Institute Low Temperature Science, Instructor, 低温科学研究所, 助手 (70186708)
Project Period (FY) 1991 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥6,300,000 (Direct Cost: ¥6,300,000)
Fiscal Year 1993: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1992: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1991: ¥2,800,000 (Direct Cost: ¥2,800,000)
KeywordsHeat Balance / Water Balance / Evapotranspiration / Watershed / Discharge / Snowemlt / Precipitation / Runoff Coefficient / 流域水収支 / 地下水位 / 流量 / 遮蔽率 / 森林密度 / 土壌水分
Research Abstract

The aims of this investigation are :
1.Areal heat balance of an experimental watarshed
2.Estimations of evapotranspiration from various surfaces
3.Variations of soil water level
4.Characteristics of water balance of the watershed.
We observed meteorological factors at 6 different sites in a small watershed, and developed the method which could estimate the snowmelt of the whole watershed. We also measured evapotranspiration with three different methods : by the calculation with Penman equation : by the residual of the water balance, and by the weighing lysimeters, which surfaces were set by vegetated soil, water and snow.
The following are the results :
(1) The amount of snowmelt runoff was about 41-53% of the annual total runoff.
(2) The remarkable seasonal variation of evapotranspiration was observed. The evapotranspiration amount was large from May to August, became smaller in Stptember and October, and was kept to be zero through snow cover season.
(3) The proportion of evapotranspiration to the precipitation was 41-47% during summer and the annual mean was 15% in the three years of the whole year observations. The ratio of runoff to precipitation 50-60% in summer and 85% for a year.

Report

(4 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] Ishikawa,N: "Transfer coefficient of sensible heat on a snowmelt surface." Meteorol.Atoms.Phys.53. 233-240 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 石川信敬: "山地小流域における融雪量の熱収支的計算法について" 雪氷. 56(1). 31-43 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 石井吉之: "母子里試験地の山腹斜面における地下水の挙動1" 低温科学. 53(印刷中). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中林宏典: "融雪期における林内放射収支量の推定" 低温科学. 52. 15-24 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 石井吉之: "母子里における夏期降水量の空間分布" 低温科学. 51. 49-58 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 石川信敬: "融雪熱収支について" 北海道の農業気象. 43. 1-10 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 石川信敬: "雪氷水文現象(前野・福田編「基礎雪氷科学講座VI」)" 古今書院, 32 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ishikawa, N.and Kodama, Y.: "Transfer coefficient of sensible heat on a snowmelt surface." Meteorol.Atmos.Phys.53. 233-240 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ishikawa, N., Nakatani, C., Kodama, Y.and Kobayashi, D.: "Heat balance study on snowmelt in a small watershed." Seppyo. 56 (1). 31-43 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ishii, Y.and Kobayashi, D.: "Movement of subsurface water on a forested hillslope in the Moshiri experimental basin." Low Temp.Sci.53 (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Nakabayashi, H., Ishikawa, N.and Kodama, Y.: "Estimation of net radiation in a forest during the snow melt season." Low Temp.Sci.52. 15-24 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ishii, Y., Kobayashi, D.and Nomura, M.: "Spatial variability of summer precipitation in the Moshiri Basin." Low Temp.Sci.51. 49-58 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ishikawa, N.: "Heat balance study on snow cover." J.Agicul.Meteorol.Hokkaido. 43. 1-10 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 石川信敬: "山地小流域における融雪量の熱収支的算出法について" 雪氷. 56(印刷中). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Ishikawa Nobuyoshi: "Transfer coefficients of sensible heat on a snowmelt surface" Meteorology and Atmospheric Physics. (印刷中). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] 石川信敬: "布による融雪促進効果" 北海道の農業気象. 45. 15-22 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 石井吉之: "山腹斜面における土壌サクションの季節変動" 北海道の雪氷. 12. 6-9 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 石井吉之: "源流域河川における1993年融雪期の電気伝導度日周変化" 低温科学. 52. 25-38 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Kobayashi Daiji: "Comparison of snowmelt hydrograph separation by recession analysis and stream temperature and conductance" Tracers in Hydrology.IAHS Publ. 215. 49-56 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 兒玉 裕二: "融雪期における盆地冷却層の解消について" 低温科学、物理編. 51. (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 中林 宏典: "長波長放射による林内融雪" 日本気象学会予稿集. 66 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 竹内 由香里: "地表面熱収支特性における積雪の効果" 低温科学、物理編. 51. 63-76 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 石川 信敬: "水文・気象観測システムの概要と研究計画" 低温科学、物理編. 51. 189-196 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 石井 吉之: "母子里における夏期降水量の空間分布" 低温科学、物理編. 51. (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 竹内 由香里: "融雪期の雪面における蒸発量の地域特性" 日本雪氷学会予稿集. 156 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 石川 信敬: "融雪熱収支について" 北海道の農業気象. 43. 1-10 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 石川 信敬: "地面の状態変化に伴う放射特性の変化" 日本気象学会予稿集. 60. 216 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 中林 宏典: "開地、針葉樹林内における融雪熱収支の比較" 日本雪氷学会予稿集. 32 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 兒玉 裕二: "融雪期における盆地の夜間冷却層の解消について" 日本雪氷学会予稿集. 157 (1991)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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