淡江大學機構典藏:Item 987654321/119422
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    題名: Impacts of urban drainage systems on stormwater hydrology: Rocky Branch Watershed, Columbia, South Carolina
    作者: Ress, Logan D.;Hung, Chen‐Ling J.;James, L. Allan
    關鍵詞: flood generation;hydrology;rainfall runoff;urban drainage
    日期: 2020-09
    上傳時間: 2020-10-24 12:10:14 (UTC+8)
    出版者: John Wiley & Sons Ltd and The Chartered Institution of Water and Environmental Management (CIWEM) 約翰威立出版有限公司與英國皇家特許水與環境管理學會
    摘要: Abstract
    Increases in impervious surfaces and land-use changes associated with urbanization have long been the focus of urban hydrological research. However, studies and calculations that consider impervious surfaces alone do not encompass
    all factors that influence urban hydrologic response, as alternative urban structures may have a substantial effect on stormflow. This study examines several
    descriptors to improve estimations of hydrologic impacts of urbanization in
    small watersheds. Configurations of drainage densities that include storm
    sewers were computed for the highly urbanized Rocky Branch Watershed.
    Storm sewer configurations resulted in an approximate tripling of the drainage
    density. In addition, rainfall and stormflow data were analyzed to compare the
    hydrologic response of two subcatchments with varying percentages of impervious areas and drainage densities. The subcatchment with a higher percentage of impervious area produced significantly (p < .01) higher runoff volumes
    with an average runoff coefficient of 0.446, while the subcatchment with
    higher storm sewer densities displayed significantly shorter lag times of 9 min.
    In this case, the percentage of impervious area increased the volume of runoff
    but, storm sewer densities accelerated hydrologic responses, suggesting that
    hydrologically relevant metrics should be considered to accurate assess flood
    risk alternatives.
    關聯: Journal of Flood Risk Management 13 (3), e12643
    DOI: 10.1111/jfr3.12643
    顯示於類別:[水資源及環境工程學系暨研究所] 期刊論文

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