Ultra-sonic flow meter shown on 24" steel pipe. Inset photo shows flow computer. No moving parts, external mount, computer logging, accuracy better than 2% of reading; 1 to 40,000 gpm range. Smaller transducers shown below on 1" steel pipe for low flow testing.

In-house software development allows use of many well hydraulic formulas that are not available in proprietary software. Numerous aquifer conditions can be evaluated: porous/fractured; confined/unconfined; leaky; bounded; and stratified. (drawdown and derivative plot for constant rate pump test below).
Aquifer, Well, and Pump Testing Services
Hydraulic Properties, Efficiency, Performance
New and Existing Wells

Hydraulic testing of wells can simultaneously provide information on the aquifer conditions, well intake efficiency, and pump characteristics. This information provides a basis for a variety of water supply evaluations, including well and aquifer capacity, water rights, well rehabilitation, and pump maintenance.

Hydraulic testing is a scientific endeavor, and if not approached as such, many mistakes can occur, ultimately resulting in lost investment by the owner. Numerous pumping tests are completed at great expense while failing to collect data properly, and/or failing to correctly analyze and interpret test results. Lack of knowledge is the main reason for poor quality testing.

Hydraulic testing requires several specific technical skills: 1) instrumentation and data acquisition; 2) well hydraulic analysis methodology; 3) computer programming; 4) numerical analysis; and 5) well and pump station engineering/operations. These skills can only be developed through specialized training and experience on a variety of tests.

Western Groundwater Services provides experience and expertise in hydraulic testing, from developing the test objectives to making the final recommendations. Comprehensive interpretations of test data provide for confident decision making and defensibility when subject to critical reviews by state agencies and third parties.

Five lineshaft turbine pumps (125 to 300 hp) were tested for overall performance. Instruments were used for measurements of pumping water level, discharge pressure, pumping rate, and true power.

Pressure transducers/data loggers, 50-300 PSIG
Ultrasonic flow computer, 1-40,000 gpm
Rossum Sand Tester
True RMS Power, 1P/3P, 2000KW
Insulation Tester, 2000Mohm/1000VDC