Researchers used a point source method to study how different water qualities affect soil infiltration. They found that high salinity in irrigation water can improve soil water infiltration, but the rate of increase decreases as salinity levels rise. The relationship between infiltration time, wetted distance, and accumulated infiltration follows a specific pattern. After 4 hours of irrigation, saline water led to greater infiltration compared to distilled water, with the highest salt concentration resulting in about twice the infiltration. These findings are important for managing salt in saline-alkali soil.