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.
|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|
|Number of pages||8|
|ISBN (Print)||9780858258686 , 0858258684|
|Publication status||Published - 2011|
Lessels, J. S., & Bishop, T. (2011). A Geostatistical Comparison between Routine and Event-based Water Quality Sampling. In E. M. Valentine, C. J. Apelt, J. Ball, H. Chanson, R. Cox, R. Ettema, G. Kuczera, M. Lambert, B. W. Melville, & J. E. Sargison (Eds.), Proceedings of the 34th World Congress of the International Association for Hydro- Environment Research and Engineering: 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering (pp. 3231-3238). Barton, A.C.T. : Engineers .