Effects of spatial distribution of hydrological characteristics on runoff according to the spatial scale of catchments

S. Kure, A. Tomizawa, R. Ebana, T. Yamada

    研究成果: Conference contribution

    抄録

    In order to arrive at good flood simulation results, it is important not only to develop physically-based runoff models but also to understand the runoff mechanisms in a basin. A large number of refined physical models or theories have been proposed to simulate runoff in watersheds during the last several decades, and has offered a wealth of useful information on the mechanism of water flow in the catchments and its contribution to the runoff. The purpose of present study is to clarify the effects of slope and river on runoff according to the spatial scale of catchments. A catchment is composed of sub-catchments with river channel network and hydrological characteristics such as rainfall, soil properties and initial conditions of the soil are distributed in an actual catchment. In order to evaluate the effects of river and spatial distribution of hydrological characteristics on runoff, runoff calculation is carried out for Tone river basin which has largest cahtchment area in Japan. The method based on morphological and geophysical properties proposed by us is applied to runoff calculation in the sub-catchment areas and unsteady flow calculation is carried out for flood routing in river channel network. In conclusion, flood routing calculation in river is not necessity for the small basin with the catchment areas less than 200km2.

    本文言語English
    ホスト出版物のタイトルWorld Environmental and Water Resources Congress 2008
    ホスト出版物のサブタイトルAhupua'a - Proceedings of the World Environmental and Water Resources Congress 2008
    DOI
    出版ステータスPublished - 2008 12 1
    イベントWorld Environmental and Water Resources Congress 2008: Ahupua'a - Honolulu, HI, United States
    継続期間: 2008 5 122008 5 16

    出版物シリーズ

    名前World Environmental and Water Resources Congress 2008: Ahupua'a - Proceedings of the World Environmental and Water Resources Congress 2008
    316

    Other

    OtherWorld Environmental and Water Resources Congress 2008: Ahupua'a
    国/地域United States
    CityHonolulu, HI
    Period08/5/1208/5/16

    ASJC Scopus subject areas

    • 管理、モニタリング、政策と法律
    • 水の科学と技術
    • 汚染

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