A proposed artificial groundwater recharge scheme for wadi systems

الملخص EN

A series of field experiments and theoretical analyses of different infiltration-recharge processes in the alluvial system are presented.

Theoretical analysis of one-dimensional vertical infiltration, lateral recharge, and recharge through the unsaturated wetting front were carried out.

Field studies indicate that the soil heterogeneity and flood hydrograph characteristics have a prominent influence on the amount and duration of recharge.

Infiltration-recharge equations for a clogged surface layer condition seem to be the best suited for estimation of recharge in most wadis in the Kingdom.

In addition, it was shown that the infiltration-recharge process can be enhanced (35 %) through artificial recharge schemes involving the construction of a series of inflatable-dcflatable rubber dams across the wadi bed for the conditions in wadi Tabalah.

These dams may be used to increased the duration and contact area of runoff and may result in a significant increase in the amount of recharge.