Record details

Title
    Long term chemical behavior of groundwater in granite with low permeability
Author
    Bláha, Vladimír
    Bůzek, František
    Pačes, Tomáš
    Pačesová, Eva
Language
    anglicky
Publication type
    článek ve sborníku
Source title - monograph
    Water-Rock Interaction, 13th International Symposium Proceedings, Guanajuato, Mexico, 16-20 August 2010
Pages
    4
Notes
    Akce: 2010/08/16 ; Guanajuato
Thesaurus term
    Groundwater, granite, hydrogeochemistry, dissolved organic carbon, 13C, temporal trends, chages with depth, pumping tests, repository of spent nuclear fuel
Keyword
    Behavior
    Chemical
    Granite
    Groundwater
    Long
    Low
    Permeability
    Term
Abstract (in english)
   Monitoring at four depth sections in granite demonstrate temporal and spatial variations in composition of groundwater. The composition reached a steady state after 60 days at a depth of 69-111 m, 600 days at a depth of 111-161 and steady state was not reached at depth from 161 to 300 m even after four and half years. In spite of the uniform composition of granite, the composition and temporal trends of dissolved components in the individual sections were different. The initial concentration of dissolve organic carbon below 220 m was extremely high, 147 mg.L-1. It dropped to a steady level of 30 mg.L-1 after 200 days. There are no sources of contamination in this area. The isotopic composition of organic carbon at depth is different from DOC derived from surface organic matter. This unusual phenomenon occurred in the type of rock considered for future repository of spent nuclear fuel.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014