Isotopic tracers to assess the snowmelt contribution to the groundwater recharge: a case from the Moroccan High and Middle Atlas Mountains

2021 ◽  
Vol 14 (23) ◽  
Author(s):  
Nadia Rhoujjati ◽  
Lahoucine Hanich ◽  
Lhoussaine Bouchaou ◽  
Nicolas Patris ◽  
Angoran Baudelaire N’da ◽  
...  
Keyword(s):  
Groundwater Recharge ◽  
Isotopic Tracers ◽  
Atlas Mountains ◽  
Middle Atlas

Isotopic signatures for the assessment of snow water resources in the Moroccan high Atlas mountains: contribution to surface and groundwater recharge

2016 ◽  
Vol 75 (9) ◽  
Author(s):  
Angoran Baudelaire N’da ◽  
Lhoussaine Bouchaou ◽  
Barbara Reichert ◽  
Lahoucine Hanich ◽  
Yassine Ait Brahim ◽  
...  
Keyword(s):  
Water Resources ◽  
Groundwater Recharge ◽  
High Atlas ◽  
Isotopic Signatures ◽  
Atlas Mountains ◽  
High Atlas Mountains ◽  
Snow Water ◽  
Surface And Groundwater

scholarly journals Late Holocene water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) inferred from charophyte remains

2009 ◽  
Vol 283 (3-4) ◽  
pp. 134-147 ◽  
Author(s):  
S. Détriché ◽  
J.-G. Bréhéret ◽  
I. Soulié-Märsche ◽  
L. Karrat ◽  
J.-J. Macaire
Keyword(s):  
Water Level ◽  
Late Holocene ◽  
Water Level Fluctuations ◽  
Atlas Mountains ◽  
Middle Atlas

Quantifying the dynamic topography through a combination of basin-averaged erosion rates and geomorphic analysis from the Anti Atlas and Western Meseta (Morocco) transient landscape

2020 ◽  
Author(s):  
Romano Clementucci ◽  
Lionel Siame ◽  
Paolo Ballato ◽  
Ahmed Yaaqoub ◽  
Abderrahim Essaifi ◽  
...  
Keyword(s):  
Large Scale ◽  
River Sediments ◽  
Transient State ◽  
Dynamic Topography ◽  
Erosion Rates ◽  
Marine Deposits ◽  
Surface Uplift ◽  
Atlas Mountains ◽  
Middle Atlas

<p>The topography of the Atlas-Meseta system (Morocco) is the result of Late Cenozoic rejuvenation related to mantle-driven uplift. This recent, large-scale dynamic uplift is testified by the occurrence of uplifted shallow-water marine deposits in the Middle Atlas Mountains and in the Western Meseta, indicating that surface uplift must have started after the Late Miocene (Messinian) at rates of 0.1 to 0.2 mm yr<sup>-1</sup>. This recent pulse is still recorded by transient river networks and by the presence of uplifted relict landscape. In particular, in the Anti Atlas and Western Maroccan Meseta, the lack of significant Cenozoic crustal shortening and the occurrence of several hundred of meters of mantle-driven uplift, offers the possibility to investigate magnitude, timing and rates of deep-seated uplift. In this study we have combined geomorphic analysis of stream profiles with in situ-produced cosmogenic concentrations (<sup>10</sup>Be, <sup>26</sup>Al) in river sediments and bedrock surfaces (corresponding to relict landscape upstream of knickpoints), in order to decipher the uplift history. Our catchment-mean erosion rates allow us to quantitatively constrain the transient state of landscape and hence to unravel the contribution of regional surface uplift on mountain building processes in Morocco during the Plio-Quaternary.</p>

scholarly journals Control of cystic echinococcosis in the Middle Atlas, Morocco: Field evaluation of the EG95 vaccine in sheep and cesticide treatment in dogs

2021 ◽  
Vol 15 (3) ◽  
pp. e0009253
Author(s):  
Fatimaezzahra Amarir ◽  
Abdelkbir Rhalem ◽  
Abderrahim Sadak ◽  
Marianne Raes ◽  
Mohamed Oukessou ◽  
...  
Keyword(s):  
Cystic Echinococcosis ◽  
Field Evaluation ◽  
North African ◽  
African Countries ◽  
Monthly Basis ◽  
Atlas Mountains ◽  
Wild Canids ◽  
Middle Atlas ◽  
North African Countries

Background Cystic echinococcosis (CE) is an important cause of human morbidity and mortality worldwide, particularly in Morocco and other North African countries. Methodology/Principal findings We investigated the potential of three strategies to reduce Echinococcus granulosus transmission: (1) 4-monthly treatment of dogs with praziquantel, (2) vaccination of sheep with the EG95 vaccine and (3) a combination of both measures. These measures were implemented during four consecutive years in different areas of the Middle Atlas Mountains in Morocco. The outcome of the interventions was assessed through hydatid cyst (viable and non-viable) counts in liver and lungs using necropsy or in vivo ultrasound examination of the liver. A total of 402 lambs were recruited for annual vaccination with the EG95 anti-E. granulosus vaccine and 395 similar lambs were selected as non-vaccinated controls. At approximately four years of age the relative risk (estimated as odds ratio) for vaccinated sheep to have viable hydatid cysts compared with non-vaccinated controls was 3% (9.37% of the vaccinated sheep were found infected while 72.82% of the controls were infected; p = 0.002). The number of viable cysts in vaccinated animals was reduced by approximately 97% (mean counts were 0.28 and 9.18 respectively; p<0.001). An average of 595 owned dogs received 4-monthly treatment during the 44 months trial, corresponding to 91% of the owned dog population. Approximately, 5% of them were examined for E. granulosus adult worms by arecoline purge or eggs in feces (confirmed by PCR). The proportion of infected dogs significantly decreased after treatment (12% versus 35%; p<0.001). Post-treatment incidence of re-infestation corresponded to a monthly risk of 4% (95% CI: 3–6%). Treatment of owned dogs on a 4-monthly basis did not reduce the level of transmission of E. granulosus to sheep, nor did it enhance the level of control generated by vaccination of sheep with EG95, possibly because of unowned dogs and wild canids were not treated. Conclusions/Significance These data suggest that vaccination of sheep with EG95 has the potential to reduce the level of CE in Morocco and in other parts of the world with similar transmission dynamics. Under the epidemiological circumstances existing in the trial area, 4-monthly treatment of owned dogs with praziquantel was insufficient to have a major impact of E. granulosus transmission to sheep.

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