**3.2 Derelict kharies and pond re-excavation and rainwater irrigation**

Derelict *kharies* (canals) ponds and *beels* (natural water body larger than pond) were re-excavated to augment surface as well as rainwater water by increasing their water holding capacity. For conserving rainwater, cross dams/check dams are constructed at different sections of the re-excavated canal maintaining a certain gradient, depth, and width. Conserved water is mainly used for supplementary irrigation. It also helps to develop an environment and enhance groundwater recharge (GWR). **Figure 3** shows the rainwater conservation system by the re-excavated canal, pond, and *beel*.

### **Figure 2.** *A deep tube well in a crop field with buried pipelines (source: [22]).*

*The Unique Approaches to Water Management for Transforming Bangladesh's Drought-Prone… DOI: http://dx.doi.org/10.5772/intechopen.105840*

Electricity-driven or solar-powered low lift pumps (LLPs) is used to withdraw the conserved water for irrigation (**Figure 4**).
