Passive tracer detector results (semi-quantitative) using Photine CU Optical Brightener. Test conducted by A.Foley & P.Mottram.
Passive tracer detector results (semi-quantitative) using Photine CU Optical Brightener. Test conducted by A.Foley & P.Mottram.
Fluorescein breakthrough curve at a well, also showing daily pumping rate. Test conducted by A.Foley.
Fluorescein breakthrough curve at a well, also showing daily pumping rate. Test conducted by A.Foley.
Multiple breakthrough curves from repeat in-well tracer tests using Sodium Chloride and measuring electrical conductivity. Test conducted by A.Foley.
Multiple breakthrough curves from repeat in-well tracer tests using Sodium Chloride and measuring electrical conductivity. Test conducted by A.Foley.

Water tracing of surface and groundwaters can provide a variety of direct data on hydrologic systems that are unobtainable by other means. These include flowpaths, water velocity, dilution and residence times, as well as a range of other processes such as diffusion or persistence of potential contaminants.

Uses of tracer tests include the determination of sources of springs and wells, determination of potential contaminant sources, and as contaminant analogues for the prediction of hydrologic system recovery (river networks, aquifers etc) following pollution.

Tracer-derived information is useful for understanding the origin, quality and vulnerability of groundwater supplies. Tracer tests may be used to explore conceptual models prior to numerical or analytical modelling, and to test numerical model results post-modelling. A comprehensive tracer test may obviate the need for modeling altogether, especially where the purpose of the model is to determine contaminant transport behaviour.

Water Tracing Services have considerable expertise in tracer test design and conduct, as well as analysis of tracer test results (please see Publications). We offer a comprehensive tracer testing service including some or all of the following elements:

  • Cost-Benefit analysis of tracer testing

  • Appraisal of possible outcomes prior to testing

  • Aquifer response and recovery from pollution events

  • Determination of principal contaminant transport and storage mechanisms in a river/aquifer/well field

  • Determination of contaminant sources and analysis of likely future behaviour in a river/aquifer/well field

  • Inputs into/testing of groundwater modelling efforts

  • Regulator liaison

  • Source Protection Zone delineation

  • Source Protection Zone testing

We have good regulatory connections and are able to produce tracer testing programs that will be acceptable to the regulator in Public Water Supply and Private Licensed Abstractions situations. Please CONTACT us for further details.