Home About Browse Search
Svenska


Projecting impacts of climate change on metal mobilization at contaminated sites: Controls by the groundwater level

Jarsjö, Jerker and Andersson-Sköld, Yvonne and Fröberg, Mats and Pietron, Jan and Borgström, Robin and Löv, Åsa and Berggren Kleja, Dan (2020). Projecting impacts of climate change on metal mobilization at contaminated sites: Controls by the groundwater level. Science of the Total Environment. 712 , 1-13
[Journal article]

[img] PDF - Published Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

2MB

Abstract

Heavy metal and metalloid contamination of topsoils from atmospheric deposition and release from landfills, agriculture, and industries is a widespread problem that is estimated to affect >50% of the Ell's land surface. Influx of contaminants from soil to groundwater and their further downstream spread and impact on drinking water quality constitute a main exposure risk to humans. There is increasing concern that the present contaminant loading of groundwater and surface water systems may be altered, and potentially aggravated, by ongoing climate change, through large-scale impacts on recharge and groundwater levels. We investigated this issue by performing hydrogeological-geochemical model projections of changes in metal(loid) (As and Pb) mobilization in response to possible (climate-driven) future shifts in groundwater level and fluctuation amplitudes. We used observed initial conditions and boundary conditions for contaminated soils in the temperate climate zone. The results showed that relatively modest increases (0.2 m) in average levels of shallow groundwater systems, which may occur in Northern Europe within the coming two decades, can increase mass flows of metals through groundwater by a factor of 2-10. There is a similar risk of increased metal mobilization in regions subject to increased (seasonal or event-scale) amplitude of groundwater levels fluctuations. Neglecting groundwater level dynamics in predictive models can thus lead to considerable and systematic underestimation of metal mobilization and future changes. More generally, our results suggest that the key to quantifying impacts of climate change on metal mobilization is to understand how the contact between groundwater and the highly water-conducting and geochemically heterogeneous topsoil layers will change in the future. (C) 2019 The Authors. Published by Elsevier B.V.

Authors/Creators:Jarsjö, Jerker and Andersson-Sköld, Yvonne and Fröberg, Mats and Pietron, Jan and Borgström, Robin and Löv, Åsa and Berggren Kleja, Dan
Title:Projecting impacts of climate change on metal mobilization at contaminated sites: Controls by the groundwater level
Year of publishing :2020
Volume:712
Page range:1-13
Number of Pages:13
Publisher:Elsevier
ISSN:0048-9697
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:Climate change, Metal mobilization, Soil, Groundwater, Mass flow, Health risk
URN:NBN:urn:nbn:se:slu:epsilon-p-104654
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-104654
Additional ID:
Type of IDID
DOI10.1016/j.scitotenv.2019.135560
Web of Science (WoS)000512369600115
ID Code:16744
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:14 Apr 2020 11:47
Metadata Last Modified:15 Aug 2020 14:44

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits