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Updated: Jun 5, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
Published on: May 1, 2018
Infiltration depth, rooting depth, and regolith flushing-A global perspective.
Ying Fan1, Gonzalo Miguez-Macho2
1Department of Earth and Planetary Sciences, Rutgers University, New Brunswick, NJ 08544, USA.
Infiltration splits into evapotranspiration (short-circuiting) and deep drainage (long-circuiting). Long-circuiting dominates wet climates, while plant water use enhances short-circuiting in drier regions, impacting global water cycles.
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Area of Science:
- Earth System Science
- Hydrology
- Biogeochemistry
Background:
- Infiltration in the root zone diverges into evapotranspiration (short-circuiting) and deep drainage (long-circuiting).
- Short-circuiting impacts weather, climate, and the carbon cycle; long-circuiting affects nutrient/contaminant transport and global biogeochemical cycles.
Purpose of the Study:
- To determine the global structure of short-circuiting versus long-circuiting of infiltrated water.
- To identify the driving forces and feedback mechanisms that shape these hydrological pathways.
Main Methods:
- Synthesized findings from site-specific studies.
- Utilized global modeling to analyze hydrological processes.
- Investigated the interplay of climate, drainage, substrate, and biomass.
Main Results:
- Long-circuiting prevails in wet climates, well-drained landscapes, and areas with deep fractures.
- Plant water use in dry climates reinforces shallow infiltration, reducing deep drainage and regolith flushing.
- Soil horizons and deep rock fractures significantly influence water pathways.
Conclusions:
- Global water belowground exhibits diverse structures and functions driven by multiscale feedbacks.
- Understanding these pathways is crucial for predicting how infiltrated rain affects the atmosphere and oceans.

