Roxelane Cakir

Sidi Mohamed Ben Abdellah University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Sabine Sauvage

Laboratoire Écologie Fonctionnelle et Environnement

J.M. Sánchez-Pérez

Centre National de la Recherche Scientifique

Mélanie Raimonet

Centre National de la Recherche Scientifique

Magali Gérino

Université de Toulouse

Youen Grusson

Centre d'Études Spatiales de la Biosphère

Sylvain Biancamaria

Laboratoire d’Études en Géophysique et Océanographie Spatiales

Moussa Mballo

Laboratoire d’Études en Géophysique et Océanographie Spatiales

Romain Walcker

Centre de Recherche sur la Biodiversité et l'Environnement

Patrick Le Moigne

Centre National de Recherches Météorologiques

Marhiu Trasmonte

Laboratoire d’Études en Géophysique et Océanographie Spatiales

Cooperative Institutions

Centre National de la Recherche Scientifique

Université de Toulouse

Université Toulouse III - Paul Sabatier

Laboratoire Écologie Fonctionnelle et Environnement

Institut de Recherche pour le Développement

Institut National Polytechnique de Toulouse

École Nationale Supérieure Agronomique de Toulouse

Laboratoire d’Études en Géophysique et Océanographie Spatiales

Météo-France

Centre de Recherche sur la Biodiversité et l'Environnement

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Hydrological Alteration Index as an Indicator of the Calibration Complexity of Water Quantity and Quality Modeling in the Context of Global Change

Water (2019)

Roxelane Cakir Mélanie Raimonet Sabine Sauvage Javier Paredes-Arquiola Youen Grusson

Modeling is a useful way to understand human and climate change impacts on the water resources of agricultural watersheds. Calibration and validation methodologies are crucial in forecasting assessments. This study explores the best calibration methodology depending on the level of hydrological alteration due to human-derived stressors. The Soil and Water Assessment Tool (SWAT) model is used to evaluate hydrology in South-West Europe in a context of intensive agriculture and water scarcity. The Index of Hydrological Alteration (IHA) is calculated using discharge observation data. A comparison of two SWAT calibration methodologies are done; a conventional calibration (CC) based on recorded in-stream water quality and quantity and an additional calibration (AC) adding crop managements practices. Even if the water quality and quantity trends are similar between CC and AC, water balance, irrigation and crop yields are different. In the context of rainfall decrease, water yield decreases in both CC and AC, while crop productions present opposite trends (+33% in CC and −31% in AC). Hydrological performance between CC and AC is correlated to IHA: When the level of IHA is under 80%, AC methodology is necessary. The combination of both calibrations appears essential to better constrain the model and to forecast the impact of climate change or anthropogenic influences on water resources.

SWAT model

Water balance

10.3390/w12010115

Cite

Citations (19)

Assessment of ecological function indicators related to nitrate under multiple human stressors in a large watershed

Ecological Indicators (2019)

Roxelane Cakir Sabine Sauvage Magali Gérino Martin Völk J.M. Sánchez-Pérez

10.1016/j.ecolind.2019.106016

Cite

Citations (17)

Total water storage variability from GRACE mission and hydrological models for a 50,000 km2 temperate watershed: the Garonne River basin (France)

Journal of Hydrology Regional Studies (2019)

Sylvain Biancamaria Moussa Mballo Patrick Le Moigne J.M. Sánchez-Pérez Grégory Espitalier-Noël

Garonne Basin, France. This study analyses water mass variations for the whole Garonne basin (50,000 km2 drainage area). To do so, Total Water Storage Anomalies (TWSA) from seven global solutions based on the Gravity Recovery And Climate Experiment (GRACE) satellite mission measurements (˜300 km spatial resolution) are inter-compared with TWSA from two hydrological models, SAFRAN-ISBA-MODCOU (SIM) and Soil and Water Assessment Tool (SWAT), between January 2003 and December 2010. Despite the small size of the Garonne basin compared to GRACE spatial resolution, good agreement between GRACE solutions and hydrological model TWSA has been found (maximum correlation coefficient ˜0.9 and Nash-Sutcliffe Efficiency, NSE, ˜0.7). These datasets showed that TWSA in the Garonne basin is mainly due to water stored in the first dozen meters of soil and in the shallow aquifer. To a smaller extent, snow also influences Garonne TWSA. Open surface water TWSA is quite small and TWSA from deep aquifer is negligible. The most important drought period occurred in 2011/2012, due to low precipitation during the two hydrological years and ETR close to previous years. Important precipitation in 2013/2014 helps to refill the water stocks. This study also showed that GRACE and models mismatches should be due to GRACE poor spatial resolution, but also to its monthly time resolution (rarely shown in previous studies).

10.1016/j.ejrh.2019.100609

Cite

Citations (55)

Evolution of N-balance with qualitative expert evaluation approach

Journal of Environmental Management (2021)

Roxelane Cakir Sabine Sauvage Romain Walcker Magali Gérino Éva Rabot

10.1016/j.jenvman.2021.112713

Cite

Citations (1)

Economic valuation of the natural service of nitrate regulation provided by rivers including dilution effects: Application to a semiarid region, the Ebro basin (Spain)

Ecological Indicators (2020)

Javier Tapia Jorge Bielsa Yolanda Martínez Sabine Sauvage Roxelane Cakir

Nitrogen pollution is one of the main problems affecting the environment and human activity. This is especially true in semiarid regions where the quantity-quality relationship is a key constraining factor. In this paper, we propose and apply a method to quantify the economic value of the environmental service a river provides as a nitrate purifier/diluent. The main aim is to provide water management decisions with a solid and easily replicable method. Specifically, this study proposes a method to assess two processes of the water quality regulation service, namely, nitrate removal and dilution, through avoided decontamination costs. The proposed method is applied in the Ebro river basin as a role model. This application allows us to define the concepts in an operational manner. Since water availability forecasts are a key factor, we explore and analyze our results in accordance with several climate-change scenarios. The results show that the economic value of the removal service at the watershed scale amounts to about €92.3 million per year. Estimates of the annual economic value of the dilution service in the whole basin range more largely from €21.8 to €111.7 million, depending on the climate change scenario considered. To our knowledge, this is the first time that the dilution and removal services provided by rivers are jointly assessed.

Dilution

10.1016/j.ecolind.2020.106608

Cite

Citations (3)

Water storage variability from GRACE and local hydrology model systems for an intermediate temperate river basin: the Garonne basin (France)

AGUFM (2018)

Sylvain Biancamaria Moussa Mballo Patrick Le Moigne J.M. Sánchez-Pérez Grégory Espitalier-Noël

Water storage

Hydrological modelling

Source

Cite

Citations (0)

Assessment of Water Quality Regulation Functions in Southwestern Europe Watersheds

Water (2021)

Roxelane Cakir Mélanie Raimonet Sabine Sauvage Romain Walcker Magali Gérino

Estimation at large scale of the water quality regulation services is still lacking. It is essential to develop methodological approaches to quantify nutrient-related functions’ distribution. The present study aims to quantify nitrate-related ecological functions through nitrate net balance (NNB), nitrate removal (NR), and nitrate production (NP). This study explores the spatiotemporal dynamics of these indicators in South-Western Europe (SUDOE, 216 subsystems over 81 basins) at a monthly scale from 2000 to 2010. We use the Soil and Water Assessment Tool model to simulate nutrient transfer at the subsystem scale (~3000 km2) and calculate ecological functions. The modeled NNB is validated at the subsystem scale by comparing with NNB predicted at the water body scale (~60 km2) over the Garonne watershed (France). Hot spots of NR are located in the south of SUDOE, characterized by a warmer and dryer climate, whereas NP hot spots are located in the most anthropized streams. The mean NNB (the balance between NP and NR) at the subsystem scale for the SUDOE territory reaches −3.5 and −2.8 gN m−2 day−1 during the most active seasons. The results highlight drivers influencing NR such as streamflow, river slope, and hydrological alteration. Getting an overview of where and when these nitrate regulation functions (NP and NR) occur is essential for socio-ecosystem sustainability and this study highlights its sensitivity to anthropogenic stressors.

Water balance

10.3390/w13212980

Cite

Citations (2)

Modeling in-stream biogeochemical processes at catchment scale: Coupling SWAT and RIVE models

Environmental Modelling & Software (2023)

Sarah Manteaux Sabine Sauvage René Samie Céline Monteil Josette Garnier

Biogeochemical Cycle

Biogeochemistry

10.1016/j.envsoft.2023.105856

Cite

Citations (9)

Socio-Economic Indicators for Water Management in the South-West Europe Territory: Sectorial Water Productivity and Intensity in Employment

Water (2024)

Beatriz Larraz Noelia García Matías Gámez Sabine Sauvage Roxelane Cakir

Given the need for water use to be a crucial consideration in sustainable development, an adequate water allocation system across economic sectors is essential, especially in the face of increasing seasonal and perennial water scarcity. In an attempt to facilitate a socially and economically efficient adaptation to the climate emergency, we propose a set of eleven socio-economic indicators to analyze the current water management. This set of indicators could help to quantify the interrelationship between water use and its economic perspective, as well as its social perspective through its impact on employment. Any demand for water not only includes the direct use of water but also its indirect use, referred to as virtual water. This is the water indirectly used through the other inputs in the production process (input–output methodology). These indicators are evaluated in the South-West Europe territory where, in light of increasing water scarcity, there is a need to orientate water allocation toward employment with less intensive water use, to more water productivity and to less environmental impacts. The results at river basin scales show that water use is more productive in the tertiary than in the secondary and primary sectors.

Water use

Scarcity

Virtual water

10.3390/w16070959

Cite

Citations (6)