Abstract
Water quality sampling occurs throughout Australia to monitor the health of catchments. Due to Australia's variable climate event-based water quality sampling has become widespread. This research examines the two dominant sampling schemes used in Australia; routine (monthly) and event-based sampling. A linear model of co-regionalisation (LMCR) was used to model auto and cross-correlated discharge and total phosphorus data, from this both variables were co-simulated. From the simulations, different sampling schemes were applied. Estimations of total load were made using a linear mixed model (LMM) which models the relationship between discharge and concentration while accounting for the auto-correlation. Threshold exceedance was also used to compare the two sampling techniques. Further comparisons were made between model estimates and raw sample analysis. The results show that the event-based sampling is more accurate than routine sampling for load estimation. However both sampling schemes are limited in the accuracy of their estimates.
Original language | English |
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Title of host publication | Proceedings of the 34th World Congress of the International Association for Hydro- Environment Research and Engineering |
Subtitle of host publication | 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering |
Editors | E M Valentine, C J Apelt, J Ball, H Chanson, R Cox, R Ettema, G Kuczera, M Lambert, B W Melville, J E Sargison |
Place of Publication | Australia |
Publisher | Barton, A.C.T. : Engineers |
Pages | 3231-3238 |
Number of pages | 8 |
ISBN (Print) | 9780858258686 , 0858258684 |
Publication status | Published - 2011 |