Research Article 2014 WRR Burdekin sediment budget | Page 10

Water Resources Research
10.1002/2013WR014386
Figure 3. (a and b) Streamflow (left) and suspended sediment (right) budgets for the Burdekin River catchment over five monitored water
years 2005/2006 to 2009/2010. Arrows represent the respective contributions from each of the Burdekin River major subcatchments, the
Burdekin Falls Dam spillway, Lower Burdekin (includes a contribution from the gauged Bowen River), and end-of-river export (Inkerman),
where the width of each arrow indicates contribution size. Each load estimate in million tonnes is accompanied by 80% confidence inter-
vals as a measure of uncertainty. Four of the major subcatchments flow into the Burdekin Falls Dam, and an estimate of suspended sedi-
ment trapped within this reservoir is also represented (% trapped accompanied with 80% CI) for each water year, as reported in Lewis
et al. [2013]. The Lower Burdekin subcatchment contribution is calculated by subtracting the BFD overflow discharge/sediment load from
the end-of-catchment (Inkerman) discharge/sediment load. The Bowen River loads in the 2007/2008, 2008/2009, and 2009/2010 water
years have low confidence due to a lack of monitoring data available for this site in the latter years. Mean annual discharge (long-term
based on available flow data at each gauge) and a 5 year mean sediment load (including SD in brackets) for each site over the study
period are also shown.
BAINBRIDGE ET AL.
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