HYDRO GEOPHYSICS TRAINING SCHOOL 2018 HCM University of Technology (April, 16 21, 2018) VIETNAM Geophysics provides several tools to study the sub surface measuring soil physical parameters from the s.
Trang 1HYDRO-GEOPHYSICS TRAINING SCHOOL 2018
HCM University of Technology (April, 16-21, 2018) VIETNAM
Geophysics provides several tools to study the sub-surface measuring soil physical parameters from the surface The training school proposes an intensive course focusing on one of main geophysical method applied to hydrological and hydrogeological problems that could be applied in Vietnam: resistivity methods (Direct Current
-DC and Electromagnetic -EM) which are one of the most appropriate parameter for hydrogeological problems
(coastal aquifers, salt water intrusion, hard rock and sedimentary aquifers) within the range 0-50 to 100 m deep
We will use Electrical Resistivity Tomography (ERT) and Time Domain (TDEM) techniques (and possibly Frequency Electromagnetic-FEM if equipment available) during a field training
Languages: Predominant is English, supporting in Vietnamese
Resistivity cross sections in sandy coastal environnement Blue colors indicate saline groundwater intrusion; red colors a
fresh sandy aquifer.
Resistvity tomography across a hard rock aquifer, West Africa
Trang 2Dates: From Monday, April 16 to Saturday, April 21
Day 1 /
class room
Day 2 / class room
Day 3 / class room
Day 4 / Field practice
Day 5 / Field practice
Day 6 / class room
Monday 16
april
Electrical
tomography
method:
Tuesday
17 april Electrical tomography method
Wednesday
18 april Electromagne tic method
Thursday
19 april
Morning: departure for field work Afternoon:
ERT measurement Night close to the field
Friday
20 april
TDEM measurements Afternoon Back from field work
Saturday
21 april (optional)
interpretation Starts 10 h to 16 h
Typical number of students: 20, Master student level preferably If some professors and /or lecturers are interested in the course, they can attend the course Requirements: Basic knowledge on hydrogeology and
geophysics 1 PC Windows computer for 2-3 people
Duration: 6 days: first 3 days in class room, then 2 days in the field, 1 day for field interpretation in classroom
at the end + exam (if needed) Typical day: 9:00-12:30h and 14 h -17:30h each day / or full day if field trip
Detail Program
1 Introduction to Hydrogeophysics and resistivity
methods
General strategy of hydrogeophysical study
Coastal zones, sedimentary and hard rock
hydrogeological models and geophysical targets
Physical properties of rock used in geophysics
Electrical properties of rocks
Direct current resistivity measurements
Introduction to electrical tomography (2D ERT)
Practice of electrical resistivity tomography (ERT) interpretation
Is ERT adapted to your problem? How to prepare an efficient survey? answers by doing a numerical modelling: forward modelling 2-D ERT
2 Practice of electrical resistivity tomography
interpretation,
Training in the numerical inversion: 2-D ERT
Practice of electrical resistivity tomography interpretation,
Training in the numerical inversion: 2-D ERT Preparation of the ERT field survey
3 Applications of Frequency (FEM) and Time Domain
Electromagnetism (TDEM)
FEM Electromagnetic methods
Theoretical lectures on TDEM method
Practice of Frequency (FEM) and Time Domain Electromagnetism (TDEM)
4 Departure for Fieldwork on coastal zones or other test
site outside the city
Fieldwork ERT
5 Fieldwork FEM and TDEM Fieldwork Back to the town
6 Field data interpretation
Starts 10:00 am
Examples of integrated hydrogeophysical studies/ Exam
The fieldwork will consist of performing an electrical tomography at each site, as well as a FEM mapping (if available) and 1 or 2 TDEM soundings (or more)
Principal organizers
Tran Anh Tu, Dr.Eng Vice Dean, Faculty of Geology & Petroleum Engineering, Ho Chi Minh City University of Technology Tu : trantu37@gmail.com; or trantu@hcmut.edu.vn,
Marc Descloitres, IGE-IRD, lecturer for the training school, senior geophysicist, Research engineer, marc.descloitres@ird.fr
For registration, please contact supporting staff:
Truong Quoc Thanh, tquocthanh@hcmut.edu.vn; cell-phone: 0168 3802 022