This study explored how capillary barriers, created by contrast in soil texture, affect water retention and salt movement in unsaturated soils. Two laboratory soil columns were created: one entirely filled with fine sand and another with a 2.5 cm layer of coarse sand placed 10 cm above the base to form a capillary barrier. Electrical conductivity sensors were installed to monitor how water and salt moved through the soil under different conditions such as rainfall, drainage, and saltwater intrusion. Results showed that the capillary barrier was effective in holding moisture in the upper part of the soil and in slowing the upward movement of salt. The column with the barrier retained more fresh water and had lower salt levels in the root zone compared to the column without the barrier. These findings suggest that capillary barriers may help increase drought resilience and reduce salt movement in coastal agricultural areas.