Your search found 5 records
1 Pavelic, P.; Dillon, P. J.; Narayan, K. A.; Herrmann, T. N.; Barnett, S. R. 1997. Integrated groundwater flow and agronomic modelling for management of dryland salinity of a coastal plain in southern Australia. Agricultural Water Management, 35(1/2):75-93.
Groundwater ; Simulation models ; Salinity ; Water table ; Arid lands ; Land management ; Crop yield ; Economic analysis / Australia
(Location: IWMI-HQ Call no: PER Record No: H021839)
2 Pavelic, Paul; Dillon, P. J.; Chusanathas, S. 2009. Lessons drawn from ASR pilot trials in alluvial aquifers in Australia and Thailand. [Extended abstract] Paper presented at the International Symposium on Efficient Groundwater Resources Management, IGS-TH 2009, Bangkok, Thailand, 16-21 February, 2009. pp.91-92.
(Location: IWMI HQ Call no: e-copy only Record No: H042540)
(0.35 MB)
3 Ward, J. D.; Simmons, C. T.; Dillon, P. J.; Pavelic, Paul. 2009. Integrated assessment of lateral flow, density effects and dispersion in aquifer storage and recovery. Journal of Hydrology, 370: 83-99. [doi: https://doi.org/10.1016/j.jhydrol.2009.02.055]
(Location: IWMI HQ Call no: e-copy only Record No: H042555)
(1.36 MB)
Aquifer storage and recovery (ASR) involves the injection of freshwater into an aquifer for later recovery and use. This paper investigates three major factors leading to reduction in performance of ASR systems in brackish or saline aquifers: lateral flow, density-driven flow and dispersive mixing. Previous analyses of aquifer storage and recovery (ASR) have considered at most two of the above processes, but never all three together, and none have considered lateral flow and density effects together. In this analysis, four dimensionless parameters are defined to give an approximate characterisation of lateral flow, dispersive mixing, mixed convection (density effects during pumping) and free convection (density effects during storage). An extensive set of numerical models spanning a wide parameter range is then used to develop a predictive framework using the dimensionless numbers. If the sum of the four dimensionless numbers (denoted RASR) exceeds 10, the ASR operation is likely to fail with no recoverable freshwater, while if RASR < 0.1, the ASR operation is likely to provide at least some recovery of freshwater. The predictive framework is tested using limited data available from ASR field sites, broadly lending support to the framework. This study has several important implications. Firstly, the lack of completeness of field data sets in the literature must be rectified if we are to properly characterise mixed-convective flow processes in ASR operations. Once data are available, the dimensionless numbers can be used to identify suitable ASR sites and the desirable operational conditions that maximise recovery efficiencies.
4 Vanderzalm, J. L.; Jeuken, B. M.; Wischusen, J. D. H.; Pavelic, Paul; Le Gal La Salle, C.; Knapton, A.; Dillon, P. J.. 2011. Recharge sources and hydrogeochemical evolution of groundwater in alluvial basins in arid central Australia. Journal of Hydrology, 397(1-2):71-82. [doi: https://doi.org/10.1016/j.jhydrol.2010.11.035]
Water resource management ; Aquifers ; Groundwater ; Water quality ; Recharge ; River basins ; Remote sensing ; Models ; Hydrology / Australia / Todd River
(Location: IWMI HQ Call no: e-copy only Record No: H043543)
(2.23 MB)
It is necessary to define the role of various sources of recharge in the surficial alluvial aquifer system in arid Alice Springs in central Australia, for future management of water resources in the region. Multiple sources of natural recharge include infiltration from ephemeral stream flow in the Todd River; groundwater throughflow between connected alluvial basins; regional groundwater flow from the underlying Tertiary aquifer; and diffuse recharge. In addition treatment, storage and irrigation reuse of Alice Springs’ waste water has resulted in additional recharge of effluent, via infiltration. Water resource management plans for the region include effluent reuse through Soil Aquifer Treatment (SAT) within one of the connected alluvial basins, with the purpose of managing the excess waste water overflows while also supplementing groundwater resources for irrigation and protecting their quality. Hydrogeochemical tracers, chloride and the stable isotopes of water, were used in a three-member mixing model to define and quantify the major recharge sources. The mixing model was not sensitive enough to quantify minor contributions from effluent in groundwater that were identified only by an evaporated isotopic signature. The contribution of the multiple recharge sources varied spatially with proximity to the recharge source; with Todd River, effluent and Town Basin throughflow contributing to the Inner Farm Basin groundwater. The Outer Farm Basin was largely influenced by the Todd River, the Inner Farm Basin throughflow and the older Tertiary aquifer. While Inner Farm groundwater throughflow contains an effluent component, only Outer Farm Basin groundwater near the interface between the two basins clearly illustrated an effluent signature. Aside from this, effluent recharge was not evident in the Outer Farm Basin, indicating that past unmanaged recharge practices will not mask signs of Managed Aquifer Recharge through the Soil Aquifer Treatment (SAT) operation. The long-term impact of effluent recharge is a shift from sodium and calcium as co-dominant cations in the groundwater, as evident in the Outer Farm Basin, to dominance by sodium alone, as typical for the Inner Farm Basin.
5 Pavelic, Paul; Dillon, P. J.; Mucha, M.; Nakai, T.; Barry, K. E.; Bestland, E. 2011. Laboratory assessment of factors affecting soil clogging of soil aquifer treatment systems. Water Research, 45(10):3153-3163. [doi: https://doi.org/10.1016/j.watres.2011.03.027]
Soils ; Clogging ; Aquifers ; Recycling ; Water quality ; Water reuse ; Soil properties ; Analytical methods ; Laboratory experimentation ; Hydraulic conductivity
(Location: IWMI HQ Call no: e-copy only Record No: H043808)
(0.80 MB)
In this study the effect of soil type, level of pre-treatment, ponding depth, temperature and sunlight on clogging of soil aquifer treatment (SAT) systems was evaluated over an eight week duration in constant temperature and glasshouse environments. Of the two soil types tested, the more permeable sand media clogged more than the loam, but still retained an order of magnitude higher absolute permeability. A 6- to 8-fold difference in hydraulic loading rates was observed between the four source water types tested (one potable water and three recycled waters), with improved water quality resulting in significantly higher infiltration. Infiltration rates for ponding depths of 30 cm and 50 cm were higher than 10 cm, although for 50 cm clogging rates were higher due to greater compaction of the clogging layer. Overall, physical clogging was more significant than other forms of clogging. Microbial clogging becomes increasingly important when the particulate concentrations in the source waters are reduced through pre-treatment and for finer textured soils due to the higher specific surface area of the media. Clogging by gas binding took place in the glasshouse but not in the lab, and mechanical clogging associated with particle rearrangement was evident in the sand media but not in the loam. These results offer insight into the soil, water quality and operating conditions needed to achieve viable SAT systems.
Powered by DB/Text WebPublisher, from
