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Integrated Field Lysimetry and Porewater Sampling for Evaluation of Chemical Mobility in Soils and Established Vegetation

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Modeling liquid distribution in soil after pocket injection.

Binxin Wu¹, Ying Chen

¹Philadelphia Mixing Solutions, 1221 E. Main St., Palmyra, PA 17078, USA.

Journal of Environmental Quality

|April 28, 2011

Summary

A numerical model predicts liquid manure distribution in soil, showing spread is unaffected by injection depth but thickness and area increase with it. Soil moisture content significantly impacts these distribution parameters.

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Area of Science:

Agricultural Engineering
Soil Science
Environmental Science

Background:

Understanding liquid manure distribution is crucial for evaluating injection techniques and tool design.
Soil infiltration characteristics influence nutrient management and environmental impact.

Purpose of the Study:

To develop and validate a numerical model for predicting liquid distribution in soil following manure injection.
To analyze the effects of injection depth and soil properties on liquid spread, thickness, and area.

Main Methods:

A two-dimensional numerical model was employed to simulate liquid infiltration.
Model parameters included injection depth and effective saturated soil content.
Model predictions were validated against field measurements from sandy loam and clay soils.

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Main Results:

Lateral spread (L) was independent of injection depth, while vertical thickness (T) and cross-sectional area (A) increased with depth.
Higher effective saturated soil content resulted in lower values of L, T, and A.
Model predictions showed better accuracy for lateral spread (L) compared to thickness (T) and area (A).

Conclusions:

The developed model provides valuable insights into liquid manure distribution patterns.
Injection depth and soil moisture content are key factors governing manure infiltration.
Further refinement of the model may improve predictions of vertical thickness and cross-sectional area.