Piezometer Networks
Characterize hydraulic and chemical gradients

Water-sampling and level-logging piezometer systems provide the capability for monitoring sub-surface chemistry and near-shore hydraulic gradients in coastal systems. Networks of piezometers can provide both short- and long-term assessment.

Trident Probe
Identify, map and characterize groundwater discharge zones


The Trident probe is a direct-push, integrated temperature sensor, conductivity sensor, grain-size sensor and porewater sampler developed to screen sites for areas where groundwater may be discharging to a surface water body.  Differences in observed conductivity and temperature indicate areas where groundwater discharge is occurring. The integral porewater sampler can be used to rapidly confirm the presence of groundwater constituents and map the subsurface distribution of contaminants of concern.

CMA provides access to a range of unique and specialized technologies for characterization and assessment of groundwater - surface water interaction sites.


Advanced Sediment Characterization Tools
The latest technologies for sediment characterization

Characterizing groundwater discharge and contaminated sediment is an evolving technical challenge. CMA can provide access to some of the most advanced tools for characterizing your sites. These include: 

  • The differential-pressure ebullition meter, a new commercial capability for time series monitoring of sediment ebullition. 

  • The Sediment Friction Sound Probe, a system that provides rapid vertical profiles screening of grain size.

  • The SEA Ring system, a new technology for assessment of in-situ contaminant bioavailability and toxicity.

  • The Passive-Push diver-less passive sampler deployment and retrieval system, supporting a range of sediment passive sampler types without the cost and safety concerns associated with diving.

UltraSeep Meter
Quantify groundwater discharge rates and contaminant fluxes


The UltraSeep system is an integrated seepage meter and water sampling system for quantifying discharge rates and chemical loading from groundwater flow to coastal waters.  Traditional seepage technology was modified and improved to include automated multiple sample collection and continuous flow detection with ultrasonic flow meters.  The resultant instrument, the UltraSeep, makes direct measurements of advective flux and contaminant concentration at a particular location.  The data produced are time series, over tidal cycles, of groundwater flow, contaminant concentration, and associated sensor data.  This allows an accurate determination of the presence or absence of groundwater flow and associated contaminant flux from a terrestrial site into a bay or estuary.

© 2014 by by Coastal Monitoring Associates.