HAL Id: cea-02338849
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From piezometric monitoring to groundwater flooding
risk management
S. Morilhat, J. Trincal
To cite this version:
S. Morilhat, J. Trincal. From piezometric monitoring to groundwater flooding risk management. GeoEnergy Days, Jul 2018, Pau, France. �cea-02338849�
FROM PIEZOMETRIC MONITORING TO
GROUNDWATER FLOODING RISK
MANAGEMENT
DTN/SMTA/LMTE
Sébastien MORILHAT
sebastien.morilhat@cea.fr
Julien TRINCAL
julien.trincal@cea.fr
CEA | 10 AVRIL 2012| PAGE 13
rd
- 5
th
July 2018
1. GENERAL PRESENTATION
8 JUIN 2018o 16 000 employees
o 1 500 PhD students
o
4.2 M d’€ of annual budget
o 684 patents in 2017
Headquarters
Civil nuclear Center (DEN)
Military nuclear Center (DAM)
Cadarache
Surface : 16 km² (~ 9 km² fenced)
Facilities : 21 INB
1 INBS
~ 20 ICPE
Staff : 5000 people
• Operational studies and expertise:
o Flow modelling (substances transfer by groundwater)
o Groundwater flooding risk (for both fast and slow hydrodynamic aquifers)
o Liquefaction risks in case of earthquakes
o Sizing of drainage device
• Management of the piezometric park and hydrodynamic monitoring:
o Drilling
o Piezometer diagnostic, rehabilitation, fillers
o Piezometric data acquisition and managment
o Groundwater data control and verification
• R&D program in hydrogeology:
o Flow modelling developments
o Benchmark of hydrogeology simulation tools : MARTHE, MODFLOW-MT3D,
FEFLOW, HYTEC…
o Crisis tool design (GRENA, PERISCOP)
o Geochemistry studies (radionuclides behaviour)
LMTE : Reference laboratory in hydrogeology for all the CEA Nuclear Energy Division (DEN) facilities
1. GENERAL PRESENTATION
8 JUIN 2018
1 km
Alluvial deposits (Quaternary)
Sandstone (Miocene)
Limestone (Cretaceous)
BN02; BN04; PZ06
P luv iom étrie Niv ea u p iéz o mét riqu e (cot e NG F )1. GENERAL PRESENTATION
1.3 SIMPLIFIED HYDROGEOLOGICAL CONTEXT OF THE CADARACHE CENTER
Quaternary
Cretaceous Miocene
+ 400 piezometers (180 with pressure sensor)
Quaternaire Miocène Crétacé
5 weather stations
(with remote transmission)
4 CPT stations (with remote transmission)
Large piezometric and weather data base
LMTE develop its own tools
PERISCOP
PIEZO
2. GROUNDWATER HYDRODYNAMIC MONITORING
Quick toolbar
Selection of graphic data
Setting data window
Formating data window
Export data window
Visualisation data window
8 JUIN 2018
Warning !
Data ok !
Chek performed !
Data ok !
1) Manual readings import
2) Raw fluctuation data import
between manual readings
3) Barometric corrections
4) Anomaly évaluation
5) Drift correction
2. GROUNDWATER HYDRODYNAMIC MONITORING
0 40 80 120 160 200 240 280 320 360 400 260 262 264 266 268 270 272 274 276 278 280 282 284 286 288 290 292 294 296 298 300 302 304 306 308 310 312 314 316 318 320 P luv iom étrie [ mm /jou rs] Co te piéz o mét riqu e [m NG F ]
Piezometer
Alert level
Facilitie
Raw rainfall
Effective rainfall
Groundwater level
T
0T
1Too short to anticipate !
2. GROUNDWATER HYDRODYNAMIC MONITORING
4.5 days forecast of the water table
MECK
(rain/level Model)Weather data
T°c
Rain
Wind
PREVI-MISTRAU tool
4.5 days prediction
ALERT
Monitoring and simulation
Real time data
GPRS
Piezometric data
(in real time)
GPRS
2. GROUNDWATER HYDRODYNAMIC MONITORING
Measurements
Forecasts
Reconstitution
Update
4.5 days
Weather data forecasted
(ETP computation)
Max piezometric
level simulated
Rainfall data (mm)
Temperature data (°C)
Groundwater level (m NGF)
PREVI-MISTRAU tool
MECK tool
Real time
2. GROUNDWATER HYDRODYNAMIC MONITORING
0 40 80 120 160 200 240 280 320 360 400 260 262 264 266 268 270 272 274 276 278 280 282 284 286 288 290 292 294 296 298 300 302 304 306 308 310 312 314 316 318 320 P luv iom étrie [ mm /jou rs] Co te piéz o mét riqu e [m NG F ]
Piezometer
Alert level
Simulated warning level
Facilitie
T
0– 2 days
T
0– 3 days
PREVI-MISTRAU
Security
T
0– 1 days
Emergency
pumps
Raw rainfall data
Effective rainfall data
Measured groudwater level
Simulated groudwater level
PERISCOP
2. GROUNDWATER HYDRODYNAMIC MONITORING
2.6 SCENARIO OF A EXTREME FLOOD BY GROUNDWATER RISING (
WITH PERISCOP)
DiEN DTN SMTA LMTE 8 JUIN 2018 | PAGE 11 CEA | 10 AVRIL 2012
Thank you for your attention !
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