**2.2 Selection of recharge system**

The most frequent technique of groundwater recycling with recharge basins is the surface spread, although it is constrained to aquifers having vadose areas. Injection wells, which have developed recently, are less prevalent in the vadose zone in unconfined aquifers. With confined or unconfined aquifers, direct injection wells may be employed; they may be used to inject a variety of aquifers at various depths (**Table 1**).
