MSc STUDENTS

10 MSc Students  from Turkey, France and Algeria were trained.

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arnaud CHAMBAT

University of Poitiers, France


Tıtle

Interpretation of Nouvelle Aquitaine Region Rainfall Data in the Context of Global Warming 


date

September 2017


Abstract

After the publication of the report of the Intergovernmental Panel on Climate Change (IPCC), the region of Nouvelle Aquitaine has launched a project to study the climate on its territory (Acclimaterra). The work done during this internship is part of this regional project and consists of studying the impact of global warming on the distribution of rainfall. Here are the first results of the rainfall survey on this territory and more particularly on the BIARD and SAUTERNES stations. A first study of the temperatures was carried out to visualize the global warming. The first results show an increase in temperatures since the beginning of the twentieth century and an acceleration in the 1980s with an increase of 1 °C in 30 years. The purpose of this work is therefore to study the impact of this increase in temperatures on the distribution of rainfall.

Several indicators have been put in place to visualize rainfall trends at the interannual, annual, daily, monthly and hourly levels. The study reveals a change in the distribution of rain that could be linked to what is called global warming but it is important to remain cautious about the causes of these changes. Indeed, we see a homogenization of the annual rainfall with an upward trend of events of high rainfall and a change in the distribution of rain within the different months which could have consequences on the recharge of groundwater. Nevertheless, a more detailed study with more stations is required to confirm these first results. This work will provide a better understanding of the regional climate and will also anticipate future changes from a natural, social and economic point of view. 

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yvan delbıranı

University of Poitiers, France

tıtle

Analysis of the Dogger groundwater vulnerability (Vienne Department, France) using the DRASTIC method 


date

September 2016 


abstract

 The aim of this study is to analyze the intrinsic vulnerability of the Dogger aquifer in the interfluve of rivers Clain and Vienne in the Department of Vienne (France). To this end, the DRASTIC method was used. The 7 maps required for the realization of this index were created using GIS. The vulnerability map obtained is fairly homogeneous, with mainly high vulnerable areas. These high vulnerability values are consistent with the karstic nature of the aquifer. However, the most vulnerable areas defined by the index are those where the water table is near the ground surface. As the Vienne Department is a very agricultural area, the validation of this study was carried out by a correlation analysis between the DRASTIC vulnerability map and the nitrate concentration in groundwater. No correlation between vulnerability and pollution was observed. However, validation using correlation analysis with pollution is not adapted, because the risk of pollution is not supported by the model. An approach to estimate the risk of pollution was attempted. This approach indicated the probable correlation between agricultural boreholes and nitrate pollution. However this hypothesis needs further verification. 

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Émılıe gılbert

University of Poitiers, France


TITLE

 Simulations of diffuse and indirect recharge of the Dogger aquifer (Poitou, France) in rivers Clain and Vienne interfluve 


dATE

September 2016 


ABSTRACT

This study is part of GRECPIMA project (Groundwater Resilience to Climate Change and High Pressure within an IWRM Approach). GRECPIMA is a European project involving the universities of Mugla in Turkey, Poitiers in France the ENSH in Algeria. 

The project focuses on the resilience of groundwater resources in a context of increased socio-economic pressures and climate change. Thus, the project brings together the socio-economic contexts and significantly different climates. 

The study area is located in the Department of Vienne (86). It is included in the interfluve Clain-Vienne. The limit to the north is the confluence of two rivers and the south boundary is the outcrop of the basement which is located near Isle Jourdain. The Dogger aquifer is the main water resource in the study area.

To better understand the impact of agricultural pressure on water resources, the first step is the assessment of inputs and outputs of natural water in the hydrogeological system. The work presented in this report deals with the estimation of the diffuse recharge and indirect recharge (relationship aquifer-rivers) using numerical modeling of groundwater flow. 

Several scenarios are tested and they indicate a variable hydrodynamic behavior in space. 

The first scenario considers a diffuse recharge between different urban areas, agricultural areas and forest areas. The second scenario considers two areas of recharge, a northern half and a southern half. The third scenario considers two separate domains of hydraulic conductivity.

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ESRA GÜLŞEN

Mugla Sitki Kocman University, Turkey & University of Poitiers, France


TITLE

 Use of Swat Model to Assess the Potential Evapotranspiration and the Spatial Distribution of Groundwater Recharge Rate. Application to the Dogger Aquifer in Poitou-Charentes 


DATE

September 2018


ABSTRACT

Calculation of potential evapotranspiration plays an important role in groundwater models. Potential evapotranspiration (PET) is a generally unknown variable in hydrological models, infiltration calculations, and rainfall-runoff models. Evapotranspiration can be measured accurately, but direct measurement of evapotranspiration is costly. As direct measurement is costly to estimate actual evapotranspiration, predicting or calculating potential evapotranspiration becomes a better choice for use in these models. There are many equations that can be used to measure potential evapotranspiration indirectly using meteorological data. This research used the Soil Water Assessment Tool (Swat) to estimate potential evapotranspiration value and to predict groundwater recharge rates. The aim of this research is to analyze which PET calculation method most accurately predicts the PET value using meteorological data and is able to estimate the spatio-temporal distribution of groundwater recharge rates. 

The study site is the Dogger Aquifer in Poitou-Charentes (France). Weather input data has been obtained from six national centers for Climate Forecast System Reanalysis (CFSR) data sets. The results of study indicate that all Potential Evapotranspiration methods perform well but the Hargreaves method gives more accurate predictions with less input data and the groundwater recharge rate is not only impacted by the climate, but also is affected by the characterization of land use. 

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FLORENT LOUIS

University of Poitiers, France


TITLE

Modeling of the Dogger aquifer in rivers Clain-Vienne interfluve (Poitou, France). Analysis of the resilience of the system to climate change 


DATE

September 2018


abstract

The climate change observed nowadays is likely to impact groundwater, the main water resources used by mankind. In the framework of the GRECPIMA project (Groundwater Resilience to Climate Change and High Pressure within the IWRM Approach), a numerical model of the Dogger aquifer, the main water resource in the Vienne Department, was developed in order to predict the effects of climate change, using the climate change scenarios.

The study area is located between rivers Clain and Vienne, limited to the north towards Chapelle-Moulière and to the south towards L'Isle-Jourdain where the aquifer is bounded by the granites of the Massif Central. The model operates at an annual time step. It was calibrated using 7 years data between 1998 and 2014 and validated from 2015 to 2018. Following the calibration, the model was run using the climate simulations from the RCP scenarios of IPCC.

In parallel, a piezometric and sampling campaign was conducted in order to collect additional piezometric data and to perform chemical analyzes on the Dogger's groundwater.


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zakı kortbı

University of Poitiers, France & National School of Hydraulics, Algeria 


tıtle

Rainfall-Runoff modeling of the Mitidja sub-watersheds (Algeria) using the GARDENIA model 


Date

September 2018


abstract

This work is focused on hydrological modeling of sub-watersheds of the Mitidja aquifer (Algeria) using the GARDENIA software. The objective is the estimation of the recharge of the Mitidja aquifer. To this end the sub-catchments of the Mitidja were identified. Ten sub-watersheds were selected controlled by the available hydrometric stations. However two were eliminated, because their hydrological regimes are perturbed by the presence of a lake and a dam. 

For the remaining sub-catchments, the best results were obtained for calibration criteria R exceeding 60 %. A maximum of 90 % was obtained for one of the sub-catchments.

From the three conceptual schemes proposed by GARDENIA, the simplest one provided the best results.

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Farah hamdıne

National School of Hydraulics, Algeria 


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selma medjekdoud

National School of Hydraulics, Algeria 


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tuğba kurtuluş

Mugla Sitki Kocman University, Turkey & University of Poitiers, France


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ersin ateş

Mugla Sitki Kocman University, Turkey


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PhD STUDENTS

3 PhD student from Turkey and Algeria are being trained.

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günseli erdem

Mugla Sitki Kocman University, Turkey

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çağdaş sağır

Mugla Sitki Kocman University, Turkey


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Samır yahıaouı

National School of Hydraulics, Algeria  


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