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THE TOWN OF AUBAIS

We went from 49 to 62 cubic metres per day

A year ago, we had major problems with our boreholes, with holes in pipework. We had to carry out an audit quickly to assess the impact on pumping capacity. Our service provider, Saur, proposed a partnership with Imageau to try and understand what was happening to our boreholes.

So we called on Imageau to carry out pumping tests, to investigate using cameras and, ultimately, to make recommendations. The main aim was to improve our pumping capacity because we had a limit of about 49 cubic metres per day authorised, and we wanted to know the real capacity at full flow.

There were several benefits to this study. Firstly, we realised that our boreholes were in a poor state, and this led us to carry out essential work with reasonable urgency. We changed all the pipework for stainless steel equipment, which increased our pumping capacity. We have now increased to 62 cubic metres per day.

LAURENT TORTOSA – DEPUTY FOR LAND USE PLANNING IN AUBAIS

SMNEP – SYNDICAT MIXTE DU NORD EST DE PAU


(Combined Association for Northeast Pau)

 

Safeguarding the water resource

Among our resources, 5 boreholes and 1 piezometer are monitored with the EMI app as part of a hydrogeological study. The water tables measured by these operations are very different: a free alluvial water table and a semi-captive to captive water table in the Infra-molassic sands. Usage is occasional.

The resource is the starting point for our entire water network. It is essential to monitor it and to understand the risks. EMI is an effective management tool that all the stakeholders must use : the operator for daily management of the system and resources (taking into account drawdowns and the transition switching from one site to another) and the association for medium and long-term planning of the production assets and the evolution of resources. The calculations carried out save time that can be devoted to human interpretation (a local hydrogeologist working for the association).

Olivier ROLIN,
DIRECTOR OF SMNEP

SYNDICAT MIXTE POUR LA PROTECTION ET LA GESTION DES NAPPES SOUTERRAINES DE LA PLAINE DU ROUSSILLON

(Combined Association for the protection and management of groundwater in the Plaine du Roussillon region)

Use of Info-sécheresse and EMI Vigilance

Within the Association area, the drought framework order established by the local authority has defined standard piezometric levels. It is essential to take these piezometric levels into account in the app.

As regards the ergonomics of the app, the graphic representation is clear, and the display of different years is an asset (clear and synthetic display). In 2020, as the region did not experience any marked drought conditions, the historical meteorological data were not used.

GRÉGOIRE NADAL – WATER TABLE TECHNICIAN

Syndicat Rocailles Bellecombe

Hydrogeological study of the Rocailles aquifer – town of Scientrier

All services have been honoured. Work was always carried out with care by the Imageau technicians. Throughout the study, they were able to adapt to the technical and political context of the SRB. The reports are of a high quality. We really enjoyed working with them over a 4-year period. Their hydrogeological expertise is significant. We wouldn’t hesitate to entrust them with new missions in the future.

We highly recommend Imageau.

 

Audrey Roch – DIRECTOR

SYNDICAT MIXTE DE GESTION DES EAUX SOUTERRAINES DE LA CRAU

(Combined Association for water table management in La Crau)

Instrumentation of La Crau water table for continuous monitoring of salinity in boreholes

The joint management association of the La Crau groundwater is the manager of a coastal groundwater body, the object of significant water extraction that is strategic for the region. The downstream part of the aquifer contains a salty water mass that comes into contact with the freshwater aquifer, forming a “saltwater wedge” interface. The understanding of the hydrogeological mechanisms that control the evolution of the equilibrium between fresh and salt water, and consequently the vulnerability of drinking water catchments, must be based on an observation network that is adapted both in its geographical and metrological aspects.

For this purpose, the SYMCRAU association collaborated with Imageau in order to equip a sentinel control piezometer with the SMD device. The instrumentation was established by the Imageau teams in October 2019, and the data is accessible in real time thanks to the EMI Exploitation platform. The regular visualisation of the data, and the settings for alert thresholds, allows us to know with precision, and in all dimensions, the state of salinity of the aquifer. The final objective is to adapt (if necessary) management measures and/or operating conditions of a catchment area.

David VILLESECHE

Montpellier méditerranée Métropole

Hydrogeological study of the Rocailles aquifer – town of Scientrier

Each year, we carry out assessments of the hydrogeological monitoring of the spring at Le Lez and for the period from 2019 to 2021, we were working with Imageau as the consultants for carrying out this mission.
Montpellier Méditerranée Métropole already has tools for monitoring the evolution of the water level at the Lez spring. With the EMI Vigilance tool, we have extended the monitoring to all the piezometric points in the catchment area, and we have also collected data that are monitored by operators other than ourselves.

The study enabled us to identify points for improvement in our monitoring, in particular a need to recalibrate our sensors in order to have well levels and also allowed us to have a proposal for a quality monitoring network to monitor the entire catchment area.

This project will enable us to produce situation reports on the state of the Lez karst resource in a much more precise, more complete way than we have been able to previously, in a very educational way, and to be able to disseminate this information internally within the various city departments, but also to all our partners within the local authority drought committee.

David Cinier – HEAD OF THE WATER RESOURCES UNIT

Syndicat Départemental de l’eau de la Manche

The software meets our needs very well

The work carried out by Imageau for the SDEAU50 association consisted of providing digital tools dedicated to the management of hydrogeological, hydrological and meteorological data and water production facilities. In addition to complying with the initial specifications, which required Imageau to adapt its tool considerably to meet them, it was the ability to take into account our remarks and comments throughout the development process, adapting the tool to our specific needs that was appreciated by our departments. There is real added value in the fact that the Imageau team is made up of both computer scientists and hydrogeologists, which means that the software meets our needs very well as a water management authority.

Mickaël Hamel – WATER RESOURCE ENGINEER

Axpo Solutions AG

Hydrogeological study of the Rocailles aquifer – town of Scientrier

As an analyst at Axpo, I am very satisfied with the services provided by Imageau, both in terms of the quality of the data supplied and the level of customer service, which is very flexible in adjusting to our specific needs. Imageau provides us with quick, easy and centralised access to various types of hydrological data, bringing great value to our analysis of the electricity markets in France.

Elyas Kazmi – ENERGY MARKET ANALYST

TOWN OF SAINT-LOUIS

We work with Imageau in complete confidence

The implementation and development of the EMI tools went very well. This was achieved through constant monitoring and discussion. Their ability to react to our requests means that we can work with Imageau in complete confidence.

Mathieu Isatelle – DEPUTY DIRECTOR – DRAINAGE AND WATER DEPARTMENT

TOWN OF GALERIA (CORSICA)

Study of the potential for exploiting the Fangu well to provide the local area drinking water supply and updating of the public utility declaration

The company carried out the services within the initial budget and deadline to our complete satisfaction.

JEAN MARIE SEITE – MAYOR OF GALERIA
GABRIELLE VALESI – HEAD OF WATER AND AQUATIC ENVIRONMENT DIVISION

They place their trust in us

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