I have been reading, and passed the following words. Thought it may help people who are interested in the same area:

Groundwater flow systems
An assessment of the 12 types of groundwater flow systems contributing to dryland salinity across Australia has shown that :
• groundwater processes in the deeply weathered landscapes of Western Australia are similar to those in the landscapes of the Eyre Peninsula in South Australia and the Dundas Tablelands in western Victoria;
• groundwater processes in the sedimentary deposits of the Murray-Darling Basin are similar to those in the Perth and Bremer Basins in Western Australia;
• clear similarities exist between the groundwater processes underlying salinity on the northern and western foot slopes of the Great Dividing Range in both Victoria and New South Wales.

Groundwater flow systems can be classified as local, intermediate or regional on their spatial extent and influence. The extent of the system has implications for its responsiveness to change in water balance and therefore influences the types of management options that are more appropriate for modifying the water balance.
• Local groundwater flow systems respond rapidly to increased groundwater recharge. Watertables rise rapidly and saline discharge typically occurs within 30 to 50 years of clearing of native vegetation for agricultural development. These systems can also respond relatively rapidly to salinity management practices, and afford opportunities to mitigate salinity at a farm scale.
• Intermediate groundwater flow systems have a greater storage capacity and generally higher permeability than local systems. They take longer to 'fill' following increased recharge. Increased discharge typically occurs within 50 to 100 years of clearing of native vegetation for agriculture. The extent and responsiveness of these groundwater systems present much greater challenges for dryland salinity management than local groundwater flow systems.
• Regional groundwater flow systems have a high storage capacity and permeability. They take much longer to develop increased groundwater discharge than local or intermediate flow systems-probably more than 100 years after clearing the native vegetation. The full extent of change may take thousands of years. The scale of regional systems is such that farm-based catchment management options are ineffective in re-establishing an acceptable water balance. These systems will require widespread community action and major land use change to secure improvements to water balance. An example is:

Local, intermediate and regional groundwater flow systems are distributed across Australia. In some areas flow systems may be superimposed or physically linked. Each system has a unique combination of attributes, but each in turn is composed of different landscapes with a degree of variability.