ΠΜΣ Περιβάλλον και Υγεία. Διαχείριση Περιβαλλοντικών Θεμάτων με Επιπτώσεις στην ΥγείαLibrary of the School of Health Sciences
Παπαγιάννης Αλέξανδρος, Καθηγητής, ΣΕΜΦΕ, ΕΜΠ
Καβατζάς Νικόλαος, Καθηγητής, Ιατρική Σχολή, ΕΚΠΑ
Νικολοπούλου - Σταμάτη Πολυξένη, Ιατρική Σχολή, ΕΚΠΑ
Διερεύνηση των υπόγειων ροών και διάχυσης του DDT στον υδροφορέα της λεκάνης του Αράχθου με εφαρμογή του υδρολογικού μοντέλου Modflow.
Numerical Simulation of groundwater flow and DDT mass transport in Arachthos aquifer using the modular hydrologic Modflow model.
The region of Epirus is not only an area with a rich aquifer but also with a strong agricultural activity. This area is a source of various socio – economic and agricultural activities because of the hydrological richness. Epirus has a significant number of cultivable lands which results in increased irrifation needs.
The underground waters of the district of Epirus end up in the Amvrakikos Gulf, crossing large urban centres, such as the city of Arta, and supplying them with drinking water through the national water network. Consequently, intensified agricultural activity and crops contaminate the waters with pollutant load from the pesticides used.
This study aims to examine the underground diffusion of pesticide DDT in the Arachthos river basin with the help of Modflow simulation model. In parallel, it attempts to determine the susceptibility of the surrounding areas to potentially elevated pollutant values through the MT3D – MS diffusion model, analyzing quality flow and pollutant load data.
The primary challenge for the study was the collection of data (such as hydrogeological characteristics, groundwater level meters, points and quantity of pumping) in order to develop the underground flow model. However, the underground flow model was developed with the adoption of certain assumptions, where it was deemed suitable and necessary, leading to an adequate understanding of the direction of groundwater movement.
Concerning the information sources of groundwater pollution of this case study, testimonies from residents of the given area were used, and other data were collected from private and public operators. These helped in the development of the DDT landfill scenario in a region near Pournari lake. Due to the lack of data on the exact burial site, and in order for the study to be consistent, a second soil scenario was adopted where the source of the pollutant was placed in an area with a dense drilling network.
Main subject category:
Epirus aquifer system, Pesticides, DDT, Stimulation, Soil dispersion, Transport, Modflow, Water quality
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