TY - GEN
T1 - The potential effect of re-snagging on hydraulic habitat
AU - Southwell, Mark
AU - Thoms, Martin
AU - Boys, Craig
PY - 2009
Y1 - 2009
N2 - Within riverine ecosystems, physical diversity facilitates biodiversity. In particular, large wood within river channels influences the distribution of hydraulic patches and their character, within the river landscape. We surveyed 30 reaches along the Barwon–Darling River in southeastern Australia to describe their hydraulic character, before and after the reintroduction of large wood (re-snagging). We found considerable hydraulic diversity within the reaches, but there was little difference between reach types (control, reference or re-snagged) and survey times. No significant differences were observed between the re-snagged reaches at the two survey times when all reaches were considered together, although differences were identified in some individual hydraulic patch variables. These results may be due to the low-flow conditions during and between survey runs. Successive surveys at a range of flow levels, both before and after the occurrence of larger flow events (which may encourage scour around re-introduced large wood), will be required to clarify this.
AB - Within riverine ecosystems, physical diversity facilitates biodiversity. In particular, large wood within river channels influences the distribution of hydraulic patches and their character, within the river landscape. We surveyed 30 reaches along the Barwon–Darling River in southeastern Australia to describe their hydraulic character, before and after the reintroduction of large wood (re-snagging). We found considerable hydraulic diversity within the reaches, but there was little difference between reach types (control, reference or re-snagged) and survey times. No significant differences were observed between the re-snagged reaches at the two survey times when all reaches were considered together, although differences were identified in some individual hydraulic patch variables. These results may be due to the low-flow conditions during and between survey runs. Successive surveys at a range of flow levels, both before and after the occurrence of larger flow events (which may encourage scour around re-introduced large wood), will be required to clarify this.
KW - Geomorphology and Regolith and Landscape Evolution
UR - http://www.iahs.info/redbooks/328.htm
UR - http://trove.nla.gov.au/work/36725561
M3 - Conference contribution
SN - 1901502996
SN - 9781901502992
T3 - IAHS Publication
SP - 103
EP - 111
BT - Ecohydrology of Surface and Groundwater Dependent Systems: Concepts, Methods and Recent Developments - Proceedings of Symposium JS.1 at the Joint IAHS & IAH Convention
A2 - Thoms, Martin
A2 - Heal, Kate
A2 - Bogh, Eva
A2 - Chambel, Antonio
A2 - Smakhtin, Vladimir
PB - IAHS Press
CY - Wallingford, United Kingdom
T2 - IAHS/IAH Convention 2009: Joint Convention of the International Association of Hydrological Sciences and the International Association of Hydrogeologists
Y2 - 6 September 2009 through 12 September 2009
ER -