Turbidity-based suspended sediment loads are presented for each river based on continuous (15 min) flow data and the use of turbidity as a surrogate for suspended sediment concentration is investigated. A database of paired flow rate and suspended sediment concentration values, collected between the years 2004 and 2011, is used to generate rating curves for each river. From these, suspended sediment load estimates using the rating curve approach are estimated and compared to the turbidity based loads for each river. Loads are also estimated using stage and seasonally separated rating curves and daily flow data, for comparison purposes.
The most accurate load estimate on the River Bandon is found using a stage separated power curve, while the most accurate load estimate on the River Owenabue is found using a general power curve. Maximum full monthly errors of ? 76 % to + 63 % are found on the River Bandon with errors of ? 65 % to + 359 % found on the River Owenabue. The average monthly error on the River Bandon is ? 12 % with an average error of + 87 % on the River Owenabue. The use of daily flow data in the load estimation process does not result in a significant loss of accuracy on either river. Historic load estimates (with a 95 % confidence interval) were hindcast from the flow record and average annual loads of 7253 ¡À 673 tonnes on the River Bandon and 1935 ¡À 325 tonnes on the River Owenabue were estimated to be passing the gauging stations.