had a gentle slope of 3–5°. The last set of testswere conducted in Greenway,
Tallahassee area. The surface material was mottled light brown
and reddish brown or light gray clayey fine sand that classified as SC
in unified and A-2-4 in AASHTO soil classification systems. Soil surface
had a 2–4° slope.
By comparing the information of the manual and automatic DRI experiments
provided in Table 2, acceptable performance of the automated
system is revealed. The obvious advantage of the systemis that it can
accurately detect when the steady state infiltration rate has reached.
5. Conclusion
The double-ring infiltrometers are widely used for in situ measurement
of field saturated hydraulic conductivity. In this paper, an automated
double ring infiltrometer was developed by using a peristaltic
pump, a water level sensor and a microcontroller. The systemautomatically
runs the test, concludes the process when steady state is reached,
and records the infiltration data on a micro-SD card. The system was
mounted in a portable and weather resistant box that can be easily
used in the field. The overall system architecture, and the design of