Pesticide, polycyclic aromatic hydrocarbon and metal contamination in the Fitzroy Estuary, Queensland, Australia : research dataset

Water samples were collected during the wet seasons (December to March) of 2003/4 and 2004/5 across the flood hydrograph at the pontoon of the Fitzroy Motor Boat Club downstream of the Fitzroy River Barrage in Rockhampton. A number of samples were also collected at the Fitzroy River mouth during the 2004 floods. In addition, three stormwater samples were collected from urban runoff in south Rockhampton in early January 2005. Sediment grabs were obtained using one of several types of grab sampler: Eckman grab, modified Van Veen and modified Smith-McIntyre. Sixteen sediment grab samples were obtained in August 2004 (survey 268, c/-Lynda Radke, Geoscience Australia). Due to project budget constraints, only nine samples (which were closest to the mouth of the river) were analysed for PAHs to obtain some idea of levels of organic contaminants in the surface sediments. The sediments varied between sandy mud to muddy-sand in texture. Additional surface benthic sediments were obtained in August and December 2005 from the main channel of the Fitzroy River downstream of the Barrage, as well as from a few sites upstream of the Barrage. A 2.6 m sediment core (277VC20A) from Keppel Bay was obtained using avibracorer in September 2004 (c/- Geoscience Australia); location: -23.50329°, 150.95235°. The core was sliced into 3–5 cm thick sections, in order to have adequate mass (minimum 75 g wet sediment) for the analyses of low-level PAH contaminants, which may be approaching the analytical limits of detection. The sediments were found to be mostly muddy in texture, with a few slices of sandier texture. Fifteen (of the 78 total) slices were analysed for PAHs, while 23 other slices were analysed for metals. Due to limited time and budget to undertake further sampling, some archived (V.Vicente-Beckett, CQU) Keppel Bay sediments (obtained in 1998), main Fitzroy Channel sediments (obtained in 2002), and a sediment core (3410) taken at the mouth of Raglan Creek in the Fitzroy Estuary (obtained by hydraulic coring from the RV Lady Basten, c/- Australian Institute of Marine Science) were included in this study (see Table A1.3, Appendix 1) in order to obtain a more extensive picture of sediment metal contents in the Fitzroy Estuary.

于2003/4及2004/5年的雨季（12月至3月）期间，在罗克汉普顿菲茨罗伊河大坝下游的浮桥处，对洪水水文过程中的水样进行了采集。此外，在2004年的洪水期间，于菲茨罗伊河口也采集了若干水样。2005年1月初，从南罗克汉普顿城市径流中采集了三份雨水样品。采用多种抓取式采样器之一：Eckman抓取式、改良型Van Veen以及改良型Smith-McIntyre，获取了沉积物样品。2004年8月（调查268号，Lynda Radke女士，澳大利亚地球科学局）共获取了16份沉积物抓取样品。鉴于项目预算限制，仅对距离河口最近的九个样品进行了多环芳烃（PAHs）的分析，以获取地表沉积物中有机污染物水平的初步认识。沉积物质地介于沙质泥至泥质沙之间。2005年8月和12月，从大坝下游的菲茨罗伊河主河道以及大坝上游的几个地点采集了额外的表面底质沉积物。2004年9月（Geoscience Australia），利用振动钻取样器在凯普尔湾获取了一根2.6米的沉积物柱状样（277VC20A）；位置：-23.50329°，150.95235°。将柱状样切割成3-5厘米厚的切片，以确保有足够的样品量（最少75克湿沉积物）用于分析低水平的多环芳烃污染物，这些污染物可能接近检测限。沉积物主要呈泥质质地，夹杂着少量沙质质地的切片。从总共78个切片中，对15个进行了多环芳烃的分析，而对另外23个切片进行了金属的分析。由于时间和预算的限制，无法进行进一步采样，因此纳入了存档的凯普尔湾沉积物（V.Vicente-Beckett，中央昆士兰大学，1998年获取）、主菲茨罗伊河渠道沉积物（2002年获取）以及从菲茨罗伊河口拉格伦溪口获取的沉积物柱状样（RV Lady Basten液压钻取样，澳大利亚海洋科学研究所，编号3410）的研究之中，以期获得菲茨罗伊河口沉积物金属含量的更全面图景（参见附录1中的表A1.3）。