A wet/wet differential pressure sensor for measuring vertical hydraulic gradient.

Area of Science:

• Environmental Science
• Hydrology
• Geophysics

Background:

• Vertical hydraulic gradient is crucial for understanding groundwater-surface water interactions in rivers, lakes, and streams.
• Traditional measurement methods include separate surface water elevation and subsurface pressure readings or direct manometer measurements.
• Electronic sensors offer high-frequency data for fluctuating gradients, while manometers provide simpler, rapid measurements.

Purpose of the Study:

• To evaluate a wet/wet differential pressure sensor for measuring vertical hydraulic gradient.
• To assess if this sensor combines the benefits of electronic sensors (high-frequency data) and manometer methods (simplicity, reduced error).

Main Methods:

• Utilized a wet/wet differential pressure sensor to measure vertical hydraulic gradient.
• Compared sensor data with traditional methods for validation.
• Employed instrumented piezometers for high-temporal frequency data acquisition.

Main Results:

• The wet/wet differential pressure sensor yielded results comparable to traditional measurement techniques.
• The sensor proved to be an acceptable method for future hydrological studies.
• This approach successfully integrated high-frequency data collection with measurement simplicity.

Conclusions:

• Wet/wet differential pressure sensors are a viable and accurate tool for measuring vertical hydraulic gradients.
• This method enhances the study of groundwater-surface water interactions by offering a blend of precision and ease of use.
• The validated sensor technology can be adopted for future research in hydrological sciences.