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1997 Fiscal Year Final Research Report Summary

Study on Dependence of Hydrological Quantities on Their Temporal-Spatial Scales

Research Project

Project/Area Number 07650593
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 水工水理学
Research InstitutionYamanashi University

Principal Investigator

SUNADA Kengo  Yamanashi University, Dept.of Civil and Environmental Eng., Professor, 工学部, 教授 (20020480)

Project Period (FY) 1995 – 1997
KeywordsRunoff processes / temporal scale / spatial scale / evapotranspiration / remote sensing data / digital elevation model / direct runoff / concentration time
Research Abstract

Based on the preliminary study on literature survey in 1995, and on the distribution of evapotranspiration from the paddy field having area of 1km^2 and the concentration times estimated from the runoff models with different catchment element sizes in 1996, the following investigation was carried out in 1997.
At first, evapotranspiration in the east-Japan region was estimated by using NOAA/AVHRR data and GPV (Grid Point Value) data. The result does not show good estimation in mountainous areas because of incompleteness of radiation estimation and extreme variability of land surface in the areas. However it is shown that estimation in flat area is fairly good. It is pointed out that a method for good aggregation of land surface heterogeneity should be developed.
In the next, the dependency of runoff model parameters on catchment element scale was examined. The concentration times of direct runoff from two catchment models having different element sizes in which lattice sizes of the digital elevation map are 250m and 500m. The result shows that average concentration time along channel is almost same in the two models, however average concentration time at catchment slope should be changed with catchment element scale.
The scale effects were focused on evapotranspiration and direct runoff as representative processes of hydrologic cycle. Some fundamental characteristics of the scale problems have been clarified in this investigation.

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] Sunada, K.and S.Fukui: "Change of Topographic Feature due to Aggregation of Peudo-Channel Networks" Proc.Intl.WS.Macro-Scale Hydrological Modeling. vol.1. 11-14 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sunada, K.and S.Fukui: "Study on Dependence of Runoff Model Parameters on the Scale of Catchment Element" Proc.Intl.Cont.Water Res.&Envir.Research. vol.1. 293-300 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 砂田 憲吾・中辻 啓二: "水理学・水文学における地球環境研究" 土木学会論文集. No.558 2-38. 1-12 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 砂田 憲吾・内藤 ゆう子・田中 賢治: "裸地・潅漑水田における蒸発散量の空間分布の推定" 水工学論文集. Vol.41. 55-60 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sunada, K.and S.Fukui: "Effect of Channel Element Scale on Runoff Response of a Catchment model" Proc. 3rd.Intl.Conf.GEWEX in Asia and GAME. vol.1. 229-234 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 福井 史応・砂田 憲吾: "流出応答特性に与える流域要素スケールの効果について" 水工学論文集. Vol.42. 205-210 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sunada, K.and S.Fukui: "Change of Topographic Feature due to Aggregation of Pseudo-Channel Networks" Proc.Intl.Workshop on Macro-Scale Hydrological Modeling. 11-14 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sunada, K.and N.Kubo: "Provisional Assessment of Effect of Expansive Rainwater Storage in Urbanized Area" Annual Journal of Hydraulic Engineering, JSCE. Vol.40. 75-80 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sunada, K.and S.Fukui: "Study on Dependence of Runoff Model Parameters on the Scale of Catchment Element" Proc.Int.Conf.on Water Res.& Environmental Research. Vol.1. 293-300 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sunada, K.and K.Nakatsuji: "Trends of Global Environmental Research in Fields of Hydraulics" Journal of Hydraulic, Coastal and Environmental Engineering, JSCE. No.582-II-40. 1-12 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sunada, K., Y.Naito and K.Tanaka: "Estimation of Spatial Distribution of Evapotranspiration at a Bare Field and an Irrigated Paddy Field" Annual Journal of Hydraulic Engineering, JSCE. Vol.41. 55-60 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sunada, K.and S.Fukui: "Effect of Channel Element Scale on Runoff Response of a Catchment Model" Proc.The Third Intl.Study Int.Conf.on GEWEX in Asia and GAME. Vol.1. 229-234 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Fukui, S.and K.Sunada: "Effect of Channel Element Scale of Runoff Response of a Catchment Model" Annual Journal of Hydraulic Engineering, JSCE. Vol.42. 205-210 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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