Wadi
A wadi is a vegetated depression. It collects rainwater and retains it so that it can slowly infiltrate the soil. This also replenishes the groundwater level. The difference from a pond or pool is that a wadi only retains water during heavy rain or water runoff and therefore dries up for part of the year. It has well-drained soil. Furthermore, the water drained into a wadi can infiltrate slowly. In this respect, it differs from a buffer, where the water often has to drain away within 24 hours.
Natural solutions
- Developing natural grasslands
- Developing natural forests
- Food forest
- Making space for beaver activity
- Making room for natural floodplains
- Making room for meandering
- Raising the stream bed
- Lowering banks
- Removing drainage systems
- Planting scrub hedges and copses
- Standard orchard
- Wide infiltration strip
- Grafts
- Swales
- Keylines
- Converting (maize) fields on slopes into grassland or woodland
- Wadi
- Intercepting runoff on (sunken) roads