Coring of the Whanganui River at Atene bend was completed in 2020 (prior to Immy’s involvement) with approximately 36 m of core collected (Figure 2). On day 1 of her PhD project in early 2022, she cored the Oreti River with her Massey University supervisors, extracting approximately 25 m of cores from eight coring sites (Figures 3 and 4). Coring of the Manawatū River is expected to take place sometime in 2022.
Immy has been analysing core materials at the University of Otago, using Geotek and ITRAX X-Ray Fluorescence (XRF) core scanners to collect high resolution core images, magnetic susceptibility data and information on the elemental composition of core materials. CT scanning of cores is also being undertaken at Invermay, providing high resolution information on core density.
Immy will use these non-destructive data sets in conjunction with laser diffraction particle size analysis, radiocarbon dating and ICPMS to reconstruct the flood histories of the target catchments.
Fuller, I.C., Macklin, M.G., Toonen, W.H., Turner, J. and Norton, K., 2019. A 2000 year record of palaeofloods in a volcanically-reset catchment: Whanganui River, New Zealand. Global and Planetary Change, 181, p.102981.
Fuller, I.C., Macklin, M.G., Toonen, W.H. and Holt, K.A., 2018. Storm-generated Holocene and historical floods in the Manawatu River, New Zealand. Geomorphology, 310, pp.102-124