By Ken Howard; Dubravka Pokrajac
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Extra info for Advanced simulation and modelling for urban groundwater management : UGROW
Given the volume of material involved, made ground may contribute solutes for long periods of time. Surface water infiltration: Where surface water bodies are polluted, there is a risk that pollution will enter the aquifer. g. Smith, 2005). g. Ellis and Rivett, 2006). 3 may result in significant changes to the relationship between surface water components and baseflow: the greater ‘flashiness’ of river flows can mean reduced dilution of baseflow during low flow periods in some systems. Industrial discharges: Industrial discharges may vary widely in composition, many of which will not be found in other contexts.
2006). In most cases, the presence of the dissolved phase implies the existence of the free phase, and in some cases the high dissolved phase concentration definitively shows this. However, many NAPLs will never be noticed in urban aquifers, and even if noticed will not necessarily be recorded. ‘New’ chemicals: New chemicals are continually being produced by industry, and manufacturing sites are often located in urban areas. Most new chemicals are synthetic organics, but may in the future also include manufactured nanoparticles.
Washing or cooling), whilst the latter takes advantage of the aquifer’s natural capacity to attenuate various contaminants. In some cases, the grey water may actually be of better quality than the groundwater into which it is injected. g. , 2006; Anders and Chrysikopoulos, 2005). For large schemes, the injection water is treated, if only to reduce the rate of clogging. 3 Aquifer discharge Most discharge boundaries in urban aquifers are of the same types as those found in non-urban aquifers. However, the greater density of abstraction wells and the greater degree to which surface drainage systems are modified in urban aquifers both influence the character of urban aquifer discharge processes.