Sustainability of Morocco’s groundwater resources in response to natural and anthropogenic forces

Abouelmagd, Abdou; Aqnouy, Mourad; Messari, Jamal Stitou El

doi:10.1016/j.jhydrol.2021.126866

Cited by 45 publications

(20 citation statements)

References 71 publications

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“…Large-scale changes impacting groundwater resources were already observed around the Mediterranean. Thus, a regional study carried out in Morocco [Ahmed et al, 2021] has shown a drop in groundwater levels in several basins, which led to the disappearance of the water table in areas with shallow aquifers. One of the main factors is related to the change in agricultural practices from rain-fed to agriculture irrigated by groundwater.…”

Section: Global Changes and Coastal Karst Aquifersmentioning

confidence: 99%

Coastal karst aquifers and submarine springs: what future for their water resources?

Fleury¹,

Pistre²,

Bakalowicz³

2024

Comptes Rendus. Géoscience

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This paper is intended to be a reminder of a series of scientific works whose origin is largely attributable to G. de Marsily, without attempting to make an exhaustive overview of submarine springs and coastal karst aquifers. The main results show that coastal karst aquifers with their submarine outlets and the possibility of natural seawater intrusion are particularly fragile and must be studied and managed with appropriate tools. For the coming decades, the evolution of the climate as results from the IPCC scenarios leads us to question the effects of the increase of sea level on this coastal resource, and the effects of frequent and severe droughts, added to an increase in withdrawals from aquifers caused by the coastalisation of the population.Résumé. Cet article a pour objectif de rappeler une série de travaux scientifiques dont l'origine est largement attribuable à G. de Marsily, sans chercher à faire un tour d'horizon exhaustif des sources sous-marines et des aquifères karstiques côtiers. Les principaux résultats montrent que les aquifères karstiques côtiers avec leurs exutoires sous-marins et la possibilité d'intrusion naturelle d'eau de mer sont particulièrement fragiles et doivent être étudiés et gérés avec des outils appropriés. Pour les décennies à venir, l'évolution du climat telle qu'elle résulte des scénarios du GIEC nous conduit à nous interroger sur les effets de l'augmentation du niveau de la mer sur cette ressource côtière, et sur les effets de sécheresses sévères et plus fréquentes et de la montée du niveau marin, ajoutés à une augmentation des prélèvements dans les aquifères causée par la littoralisation de la population.

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Section: Global Changes and Coastal Karst Aquifersmentioning

confidence: 99%

Coastal karst aquifers and submarine springs: what future for their water resources?

Fleury¹,

Pistre²,

Bakalowicz³

2024

Comptes Rendus. Géoscience

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“…Contrary to traditionally ground-based observations or hydrological models, the launches of Gravity Recovery and Climate Experiment (GRACE) twin satellites in 2002 and its successor GRACE Follow-on (GRACE-FO) satellites in 2018 can provide a new methodology for retrieving terrestrial water storage anomalies (TWSAs) in real time globally by measuring temporal variations in Earth's gravity field (Ahmed et al, 2021;Tapley et al, 2004). The TWSA derived from GRACE and GRACE-FO satellites comprises all the surface and subsurface water over land, which can be used to monitor the hydrologic variations in response to extreme weather events (Li et al, 2022;Xie et al, 2019a).…”

Section: Introductionmentioning

confidence: 99%

Monitoring the extreme flood events in the Yangtze River basin based on GRACE and GRACE-FO satellite data

Xie

Xu²,

Yu³

et al. 2022

Hydrol. Earth Syst. Sci.

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Abstract. Gravity Recovery and Climate Experiment (GRACE) and its successor GRACE Follow-on (GRACE-FO) satellite provide terrestrial water storage anomaly (TWSA) estimates globally that can be used to monitor flood in various regions at monthly intervals. However, the coarse temporal resolution of GRACE and GRACE-FO satellite data has been limiting their applications at finer temporal scales. In this study, TWSA estimates have been reconstructed and then temporally downscaled into daily values based on three different learning-based models, namely a multi-layer perceptron (MLP) model, a long-short term memory (LSTM) model and a multiple linear regression (MLR) model. Furthermore, a new index incorporating temporally downscaled TWSA estimates combined with daily average precipitation anomalies is proposed to monitor the severe flood events at sub-monthly timescales for the Yangtze River basin (YRB), China. The results indicated that (1) the MLP model shows the best performance in reconstructing the monthly TWSA with root mean square error (RMSE) = 10.9 mm per month and Nash–Sutcliffe efficiency (NSE) = 0.89 during the validation period; (2) the MLP model can be useful in temporally downscaling monthly TWSA estimates into daily values; (3) the proposed normalized daily flood potential index (NDFPI) facilitates robust and reliable characterization of severe flood events at sub-monthly timescales; (4) the flood events can be monitored by the proposed NDFPI earlier than traditional streamflow observations with respect to the YRB and its individual subbasins. All these findings can provide new opportunities for applying GRACE and GRACE-FO satellite data to investigations of sub-monthly signals and have important implications for flood hazard prevention and mitigation in the study region.

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“…Many studies have been carried out on GRACE to understand the status of groundwater [5]- [9], drought [10], urban groundwater variability [11] and solid earth [12]. Ahmed et al, (2021) has demonstrated the impact of anthropogenic activities on groundwater in Morocco and the need for taking sustainable measures. The major economy of India is from the agriculture industry and the production of water-intensive crops like paddy, wheat, cotton, sugarcane, has been suggested as one of the major reasons for groundwater depletion in the country, specifically north-western states [14].…”

Section: Introductionmentioning

confidence: 99%

Critical analysis of hydrological mass variations of northwest India

Shivani

Srivastava

Singh

2022

IOP Conf. Ser.: Earth Environ. Sci.

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With current climate change, water availability is a huge concern. Ground-water (GW) is depleting at a steep rate globally and more specifically in Northwest India. Estimation and analysis of GW availability would be of great use for formulating a proper water management plan for the future. The study is carried out in the north-western part of India with the aim of generating a time series for total water storage (TWS) using different remote sensing and model-based data like GRACE, Landsat, MODIS. From the time series, it is clear-cut that, the TWS is showing a declining trend and this might be due to depletion of groundwater as, other variables like precipitation, evapotranspiration, soil moisture (obtained from MERRA-2 and CFSR data) are not showing any negative trend during the study period (2002 - 2021). Also, from the change detection analysis of land use land cover maps and crop yield statistics of water-intensive crops it can be concluded that croplands in the study area are increasing denoting the usage of water for irrigation at a large scale. Thus, better management of the groundwater is required for avoiding severe water scarcity in the future.

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Sustainability of Morocco’s groundwater resources in response to natural and anthropogenic forces

Cited by 45 publications

References 71 publications

Coastal karst aquifers and submarine springs: what future for their water resources?

Coastal karst aquifers and submarine springs: what future for their water resources?

Monitoring the extreme flood events in the Yangtze River basin based on GRACE and GRACE-FO satellite data

Critical analysis of hydrological mass variations of northwest India

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