Outreach

SWIP: An integrated workflow for surface-wave dispersion inversion and profiling

The simultaneous estimation of 2D pressure (P-) and S-wave velocities (VP and VS, respectively) is a promising approach for imaging subsurface mechanical properties. It can be performed with a single acquisition setup by combining P-wave refraction and surface-wave (SW) analysis. Although SW methods are commonly applied for the 1D estimation of VS, 2D profiling requires the implementation of specific processing […]

Papers geodesy, geophysics, hydrogeophysics, modeling, programming, Tool

Installation of a superconducting gravimeter at the Strengbach site (OHGE)

03 July 2017 A new generation superconducting gravimeter was installed by the EOST / IPG Strasbourg gravimetry team in a building of the TDF antenna on the summit of the Strengbach watershed in the Vosges Mountains (Observatoire HydroGéochimique de l’Environnement, OHGE). This instrument is one of the three superconducting gravimeters acquired as part of the CRITEX Excellence project, which also […]

In newspapers, News catchment, groundwater, hydrogeology

Neutrally buoyant tracers in hydrogeophysics: Field demonstration in fractured rock

Electrical and electromagnetic methods are extensively used to map electrically conductive tracers within hydrogeologic systems. Often, the tracers used consist of dissolved salt in water, leading to a denser mixture than the ambient formation water. Density eﬀects are often ignored and rarely modeled but can dramatically aﬀect transport behavior and introduce dynamics that are unrepresentative of the response obtained with […]

Papers hydrogeology, hydrogeophysics, Salinity, transport

Passive temperature tomography experiments to characterize transmissivity and connectivity of preferential flow paths in fractured media

The detection of preferential flow paths and the characterization of their hydraulic properties are major challenges in fractured rock hydrology. In this study, we propose to use temperature as a passive tracer to characterize fracture connectivity and hydraulic properties. In particular, we propose a new temperature tomography field method in which borehole temperature profiles are measured under different pumping conditions […]

Papers hydrogeology, hydrology, Temperature

The bungalow that streamlines research

Sorry, this article is in french only! Go to the article in french

In newspapers

Glacial recharge, salinisation and anthropogenic contamination in the coastal aquifers of Recife (Brazil)

Implying large residence times and complex water origins deep coastal aquifers are of particular interest as they are remarkable markers of climate, water use and land use changes. Over the last decades, the Metropolitan Region of Recife (Brazil) went through extensive environmental changes increasing the pressure on water resources and giving rise to numerous environmental consequences on the coastal groundwater […]

Papers ecology, groundwater, Salinity, Temperature

Newsletter 4: March 2017

Editorial Welcome to the 2016 CRITEX’s Newsletter! You will find in this issue a report of the main events and achievements of the program in 2016, including a descrpition of each workpackage and interviews of Jean François Soussana from the National Institute for Agricultural Research and Alexandra Arènes, a landscape Architect that is fascinated by the Critical Zone Scientists… Three […]

Newsletters

Autonomous Sensors for Measuring Continuously the Moisture and Salinity of a Porous Medium

The article describes a new ﬁeld sensor to monitor continuously in situ moisture and salinity of a porous medium via measurements of its dielectric permittivity, conductivity and temperature. It intends to overcome difﬁculties and biases encountered with sensors based on the same sensitivity principle. Permittivity and conductivity are determined simultaneously by a self-balanced bridge, which measures directly the admittance of […]

Papers, WP2 - Water pulsations groundwater, high frequency, Instrument, Moisture, Salinity, Sensor, soil, Temperature, Tool

Task 6.3 presentation movie

Movie

pyGrav, a Python-based program for handling and processing relative gravity data

pyGrav is a Python-based open-source software dedicated to the complete processing of relative-gravity data. It is particularly suited for time-lapse gravity surveys where high precision is sought. Its purpose is to bind together single-task processing codes in a user friendly interface for handy and fast treatment of raw gravity data from many stations of a network. The intuitive object-based implementation […]

Papers, WP2 - Water pulsations hydrogeology, modeling, programming

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