The response of a small stream in the Lesní potok forested catchment, central Czech Republic, to a short-term in-stream acidification

0145785 - GLU-S 20033157 RIV DE eng J - Journal Article
Navrátil, Tomáš - Vach, Marek - Norton, S. A. - Skřivan, Petr - Hruška, J. - Maggini, L.
The response of a small stream in the Lesní potok forested catchment, central Czech Republic, to a short-term in-stream acidification.
Hydrology and Earth System Sciences. Roč. 7, č. 3 (2003), s. 411-422. ISSN 1027-5606. E-ISSN 1607-7938
R&D Projects: GA MŠMT ME 147; GA AV ČR IAB3013203
Grant - others:U. S. Geological Survey(US) 2001ME1481G
Institutional research plan: CEZ:AV0Z3013912
Keywords : Al, Ca, Mg * stream sediment * Lesní Potok
Subject RIV: DD - Geochemistry
Impact factor: 0.948, year: 2003
http://www.hydrol-earth-syst-sci.net/7/411/2003/hess-7-411-2003.pdf

Lesni potok stream in central Czech Republic was artificially acidified with HCl for 4hours to assess the role of stream substrate in acid-neutralization and recovery. The pH was lowered from 4.7 to 3.2. Desorption of Ca and Mg, and desorption or solution of Al dominated acid-neutralization; Al mobilization dominated later. The stream substrate released 4542 meq Ca, 1184 meq Mg, and 2329 meq Al over a 70m long by 1m wide reach. Adsorption of SO4 and desorption (?) of F occurred during the acidification phase of the experiment. The reactions were rapidly reversible for Ca, Mg, and SO4 but not symmetric as the substrate resorbed 1083, 790 and 0 meq Ca, Mg, and Al, respectively, in a 4 hour recovery period. Desorption of SO4 occurred during the resorption of Ca and Mg. A mathematical mass balance model, MASS (Modeling Acidification of Stream Sediments), was developed to simulate the adsorption and desorption of base cations during the experiment.
Permanent Link: http://hdl.handle.net/11104/0043334