English  |  正體中文  |  简体中文  |  Items with full text/Total items : 65318/65318 (100%)
Visitors : 21738560      Online Users : 536
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50598

    Title: Effect of transverse dispersion on solute transport in a vertical dipole flow test with a tracer
    Authors: Chen,JS;Liu,CW;Chan,YC;Ni,CF;Kao,KK
    Contributors: 應用地質研究所
    Date: 2011
    Issue Date: 2012-03-27 17:37:36 (UTC+8)
    Publisher: 國立中央大學
    Abstract: Vertical dipole flow test with a tracer (DFTT) have been proposed as an in situ method to determine the longitudinal dispersivity from analysis of the breakthrough curves (BTCs) in the extracted screened interval by assuming that only the longitudinal dispersion has an effect on the BTCs. However, the tracer must undergo transverse dispersion before it enters the extracted screened interval and will certainly influence BTCs in the extracted screened interval. The purpose of this study is to investigate the effect of the transverse dispersion on the BTCs in the extracted screened interval during a vertical DFTT and to examine the applicable condition of a DFTT in determining the longitudinal dispersivity. A previously developed mathematical model for reagent transport in a vertical circulation flow field is modified and used for the investigation. Simulation results demonstrate that the transverse dispersion exerts significant effects on the BTCs in the extracted screened interval in an aquifer with a large hydraulic conductivity anisotropy ratio and a large longitudinal dispersivity. The selection of operational parameters including the interval location, lengths of the screened interval and interval distances does not significantly promote the applying condition of the DFTT for determining the longitudinal dispersivity. It suggests that longitudinal dispersivity cannot be solely determined by analysis of the BTCs, simply because the BTCs are simultaneously affected by both the longitudinal and transverse dispersions. One should note that the DFTT can only be applied to evaluate the longitudinal dispersivity in an aquifer with a small hydraulic conductivity anisotropy ratio or a small longitudinal dispersivity. (C) 2011 Elsevier B.V. All rights reserved.
    Appears in Collections:[應用地質研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明