Simulating the response of metal contaminated lakes to reductions in atmospheric loading using a modified QWASI model

Citation
Dg. Woodfine et al., Simulating the response of metal contaminated lakes to reductions in atmospheric loading using a modified QWASI model, CHEMOSPHERE, 41(9), 2000, pp. 1377-1388
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
CHEMOSPHERE
ISSN journal
0045-6535 → ACNP
Volume
41
Issue
9
Year of publication
2000
Pages
1377 - 1388
Database
ISI
SICI code
0045-6535(200011)41:9<1377:STROMC>2.0.ZU;2-R
Abstract
The changes in metal concentration following significant reductions in atmo spheric metal loading of two nickel and copper contaminated lakes in Conist on Valley of the Sudbury Basin of Ontario, Canada were simulated by using s teady-state and dynamic versions of a modified Quantitative Water Air Sedim ent Interaction (QWASI) Model. Metal partitioning and precipitation process es were quantified with the aid of US EPA's MINTEQA2 Model. The dynamic mod el successfully described the recovery of the two lakes and identified key input, loss and partitioning processes. A useful modelling strategy is to d evelop one or more steady-state models that give an approximate representat ion of conditions at defined times, then extend this to a dynamic version w hich can take into account the differing rates of response of components of the system. This modelling strategy can be used for designing and assessin g remediation programs for metal contaminated lakes and watersheds. (C) 200 0 Elsevier Science Ltd. All rights reserved.