Development and validation of a siphoning prototype for surface runoff evaluation

Area of Science:

• Environmental Science
• Soil Science
• Hydrology

Background:

• Soil and water quality degradation necessitates research into rainfall's impact on surface runoff.
• Accurate quantification of runoff volume and associated losses is crucial for data integrity.

Purpose of the Study:

• To develop and validate a compact, low-cost system for quantifying surface runoff, sediments, and chemical element losses.
• To assess the efficacy of the bucket-siphon sampler system (BS3) method.

Main Methods:

• Utilized a bucket-siphon sampler system (BS3) for quantifying surface runoff.
• Conducted tests using runoff from Nitisol and laboratory-prepared soil-water solutions (Nitisol, Cambisol).
• Evaluated the system's efficiency in estimating water volume, sediment concentration, and phosphorus (P) loss.

Main Results:

• The BS3 method effectively estimated total water runoff volume and concentrations of sediments and P.
• The system supports a maximum flow rate of 0.035 L s⁻¹, equivalent to 12.6 mm h⁻¹ for a 10-m² plot.
• The developed prototype is suitable for field plot studies and costs under US$15.00.

Conclusions:

• The BS3 method provides a precise and affordable tool for monitoring runoff and nutrient losses.
• Calibration of individual units is recommended for optimal accuracy due to the system's construction.
• This system aids in assessing soil and water quality impacts related to surface runoff events.