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

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

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    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.

    Original languageEnglish
    Title of host publicationWorld Environmental and Water Resources Congress 2008
    Subtitle of host publicationAhupua'a - Proceedings of the World Environmental and Water Resources Congress 2008
    DOIs
    Publication statusPublished - 2008 Dec 1
    EventWorld Environmental and Water Resources Congress 2008: Ahupua'a - Honolulu, HI, United States
    Duration: 2008 May 122008 May 16

    Publication series

    NameWorld Environmental and Water Resources Congress 2008: Ahupua'a - Proceedings of the World Environmental and Water Resources Congress 2008
    Volume316

    Other

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

    Keywords

    • Catchments
    • Runoff
    • Spatial distribution
    • Subsurface flow

    ASJC Scopus subject areas

    • Management, Monitoring, Policy and Law
    • Water Science and Technology
    • Pollution

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