ORIENTATION I – WATER & ENVIRONMENT
My research focuses on the transfer of trace elements and ultra-traces in the continuum river-estuary-coastal zone and through the aquatic food web. At the same time, I’m interested to characterize the roles of regional hydrodynamic (flow, tide), the particle dynamics and physicochemical environmental conditions on these transfers.
Changing hydrological and physicochemical conditions in the tropical Saigon River and the presence of various environments (aquaculture, agriculture, urban area, mangrove, estuary) are great environments to conduct such research activities. A research team on this theme is being consolidated in order to carry out the following research actions
- Integrative baseline assessment of trace metal contents in the Saigon River
- Impact of a megacity on the dynamic of aggregates and inorganic substances bound particles
- Roles of estuarine gradients on trace metal export from the Saigon River to the mangrove and coastal zone
- trace metal bioaccumulation in local aquatic foodweb
This project in conducted in collaboration with Emilie STRADY (LTHE, CARE) and Dr DINH Quoc Tuc, Dr Nguyen Phuoc Dan, MINH Tam Le, Khanh and Viet from CARE.
In Southern countries, particularly Vietnam, the mismanagement of plastic waste (4th in the world for Vietnam; Science 13 Feb 2015) leads to significant releases in coastal waters. Locally, the macroscopic plastic waste discharges are considered as a visual discomfort for the attractiveness of big cities like Ho Chi Minh City (HCMC).
Solid transport plastics and MP in the rivers is very little known today. The main reason is historical as this thematic began in Biological Oceanography. Thus, sources and continental transport of MP are recent questioning, and sampling strategies used to collect and quantify the MP are difficult to transpose into river. Studies implemented in continental environment to quantify and estimate the transport of PM flows are based on snapshot sampling with plankton nets either on the setting up nets on the transect of the river either over a given period . The surface area / volume ratio of plastics in surface water is much smaller than in oceanic gyres, the amount of MP recovered and therefore its mass becomes a critical parameter for determining concentrations and MM flows into the river, but also for subsequent chemical analysis.
The objective of this emerging research group is to optimize a sampling strategy and quantification of plastics and microplastics in the Saigon River in Vietnam, to ultimately consider the homogeneity of transport in the water column (bed load) and to estimate the flux transported in the river.
This project is conducted in collaboration with Dr Bruno TASSIN, Dr Johnny GASPERI and Rachid DRIS (PhD) from LEESU (Laboratoire Eau Environnement et Systems Urbains, France), MINH Tam Le from CARE and Dr Emilie STRADY from CARE et LTHE.
ORIENTATION II – WATER & RISK
The proposed interdisciplinary approach will allow, in the short and medium term, to answer a crucial question: What are the impacts of coastal urbanization on the quality of the environment? In particular, we wish to characterize the dynamics of flocs (and adsorbed nutrients) in order to understand how wastewater from Ho Chi Minh City impacts the Can Gio mangrove estuarine, certified by UNESCO.
The proposed interdisciplinary approach will allow, in the short and medium term, to answer two crucial questions:
Question 1) What processes have led to the coastal erosion of the Mekong Delta and its acceleration in the last decade (average loss of 1,5 football pitches per day over the period 2007-2012)?
Question 2) What are coastal, physically viable and socially acceptable coastal protection solutions that can be successfully implemented in this coastal mangrove environment, considering the natural geomorphological balances that contributed to the progression of the delta for more than 3500 years?
ORIENTATION III – WATER & HEALTH
- École Polytechnique Fédérale de Lausanne (EPFL), Switzerland:
- Rizlan Latmani-Bernier (Team Leader of EPFL)
- Matthew Reid
- Maria Pilar Asta
- Yuheng Wang
- Manon Frutschi
- Université Joseph Fourier –UJF in Grenoble, France:
- Laurent Charlet (Team Leader of Grenoble)
- Tesserand Delphine
- Phan Thi Hai Van (PhD student)
- Bonnet Timothee
- Ho Chi Minh City University of Technology (HCMUT), Vietnam:
- Associate Professor Vo Le Phu (Team Leader of HCMUT – CARE)
- Nguyen Thi Ngoc Quynh
- Ho Thi Ngoc Ha
- Pham Cong Hoai Vu (Master student)
- Nguyen Thi Bao Tu (Master student)
|Kick-off Meeting at HCMUT- CARE||Fieldtrip Sample Processing||In-lab Skill Training|