Estimating Method of Maximum Infiltration Depth and Soil Water Supply

Area of Science:

• Soil Science
• Hydrology
• Ecology

Background:

• Estimating maximum infiltration depth and soil water supply is vital for sustainable soil water resource management.
• Current methods lack non-destructive approaches for these critical hydrological parameters.
• Understanding these factors is essential for assessing vegetation water-carrying capacity in water-limited environments.

Purpose of the Study:

• To develop and validate a non-destructive method for estimating maximum infiltration depth.
• To determine the soil water supply following rainfall events.
• To assess the sustainable use of soil water resources in semiarid regions.

Main Methods:

• Conducted simulated infiltration experiments in artificial Caragana shrubland.
• Performed long-term, fixed-position in situ investigations.
• Utilized a series of two-curve methods to analyze soil water distribution before and after rainfall.

Main Results:

• Infiltration depth was determined by the crossover point of soil water distribution curves.
• Soil water supply was calculated as the difference in soil water resources within the maximum infiltration depth.
• A maximum infiltration depth of 2.9 meters was recorded in the studied shrubland.

Conclusions:

• The developed two-curve method provides a non-destructive means to estimate maximum infiltration depth and soil water supply.
• Findings support sustainable soil water resource management and control of soil degradation in water-limited ecosystems.
• The study establishes a foundation for ecological restoration and management in semiarid regions like the Loess Plateau.