**7.3 Injection wells**

Injection well is generally recommended in urban areas (**Figure 6**). It is operational in certain hydrogeological setting for groundwater recharge where the aquifers do not get the natural recharge because of the confining layers of low permeability [11]. There are following advantages for installation of the injection well:


**Figure 6.**

*Injection well for groundwater recharge.*

#### **Figure 7.** *Subsurface dyke for surface water harvesting.*

• Water available for groundwater recharging is to be fairly treated for elimination of suspended material, chemical stabilization and bacterial manipulation.

### **7.4 Subsurface dykes**

