CORPORACION AMBIENTAL DE MEXICO

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- Geographic Information Systems
- Geomatics

Permeability Testing

In CAM we have equipment and capacity to carry out testing of permeability "in situ". The convenience of its application, in different modalities, depends on the specific technical and economic needs of each project.

We recommend carrying out the tests for permeability in field, because the data are more representative of the strata of the subsoil as a whole; unlike the so-called evidence of permeability of the laboratory focus on a feature called sample.

To obtain the hydraulic conductivity, among other values of aquifers, pumping test is perhaps the most reliable and complete. Its implementation requires the installation of wells of extraction and observation which take readings of flow rate of extraction and piezometric levels measured in observation wells. CAM uses sophisticated electronic systems to obtain the different variables. Already in Cabinet CAM geo hydrologist process field with Aquifer Test Pro software information.

Test slug (fall/rise of pressure) a solid device is immersed in the piezometer which generates an instant lifting of the water level. From these data the various relationships well, the geo hydrology and piezometric levels, are used to estimate the hydraulic conductivity. Highly sensitive electronic reading devices are used to measure levels of groundwater in a very precise way.

Infiltration. Horton (1933) defines a soil infiltration capacity, as the maximum amount of rain water which can be absorbed in the unit of time and conditions previously defined. Precisely, the relationship between the intensity of rainfall and infiltration capacity will determine the amount of water that will penetrate into the ground and which by direct runoff will feed causes of surface currents.

Soils saturated and unsaturated permeability tests, through a survey are carried out by the brigades of CAM with the help of the TAM Externally Inflated Packers. This device "seals the top and bottom, part in a range of soil defined previously." After sealing, water is injected with pressure and known flow, which defines the permeability in each stratum evaluated in the survey. These data allow us to understand the different types of strata permeability in the same area, so that the information is very useful for the subsequent decisions of the project.