Insight into dissolved organic matter fractions in Lake Wivenhoe during and after a major flood

Aryal, Rupak, Grinham, Alistair and Beecham, Simon (2016) Insight into dissolved organic matter fractions in Lake Wivenhoe during and after a major flood. Environmental Monitoring and Assessment, 188 3: 1-11. doi:10.1007/s10661-016-5116-7

Author Aryal, Rupak
Grinham, Alistair
Beecham, Simon
Title Insight into dissolved organic matter fractions in Lake Wivenhoe during and after a major flood
Journal name Environmental Monitoring and Assessment   Check publisher's open access policy
ISSN 1573-2959
Publication date 2016-03
Sub-type Article (original research)
DOI 10.1007/s10661-016-5116-7
Volume 188
Issue 3
Start page 1
End page 11
Total pages 11
Place of publication Dordrecht, Netherlands
Publisher Springer Netherlands
Collection year 2017
Language eng
Formatted abstract
Dissolved organic matter is an important component of biogeochemical processes in aquatic environments. Dissolved organic matter may consist of a myriad of different fractions and resultant processing pathways. In early January 2011, heavy rainfall occurred across South East Queensland, Australia causing significant catchment inflow into Lake Wivenhoe, which is the largest water supply reservoir for the city of Brisbane, Australia. The horizontal and vertical distributions of dissolved organic matter fractions in the lake during the flood period were investigated and then compared with stratified conditions with no catchment inflows. The results clearly demonstrate a large variation in dissolved organic matter fractions associated with inflow conditions compared with stratified conditions. During inflows, dissolved organic matter concentrations in the reservoir were fivefold lower than during stratified conditions. Within the dissolved organic matter fractions during inflow, the hydrophobic and humic acid fractions were almost half those recorded during the stratified period whilst low molecular weight neutrals were higher during the flood period compared to during the stratified period. Information on dissolved organic matter and the spatial and vertical variations in its constituents’ concentrations across the lake can be very useful for catchment and lake management and for selecting appropriate water treatment processes.
Keyword Dissolved organic matter
Molecular weight distribution
Reservoir water quality
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
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