Study of physicochemical and microbiological quality of two north Moroccan hydrographic networks: Laou and Tahaddart

Errochdi, Sanae; Alami, Majida El; Bennas, Nard; Belqat, Boutaïna; Ater, Mohammed; Fdil, Fatiha

doi:10.4000/mediterranee.6221

Cited by 14 publications

(13 citation statements)

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“…In Morocco, standardized methodology and well-known indices have been used such as: the IBD (Indice Biologique Diatomées) based on diatoms [ 62 , 63 ] (Fawzi et al); the IBMR (Indice Biologique Macrophytes Rivières) for macrophytes [ 64 ] Bentaibi et al, 2014); the IBMWP (Iberian BMWP) [ 65 – 67 ] and the IBGN (Indice Biologique Global Normalisé) [ 68 , 69 ] for macroinvertebrates; and the QBR (Index of Riparian Quality) for riparian vegetation [ 67 ]. Other studies have adapted the principles of the European WFD to Maroc-can rivers [ 66 , 70 , 71 ]. In Algeria, freshwaters have been recently assessed with benthic invertebrates to detect the effects of pollution through use of indices and metrics such as the BMWP, IBGN and EPT in Kebir-Rhumel or Guebli river catchments and streams in the Belezma National Park (Biosphere Reserve) [ 72 – 74 ].…”

Section: Biological Assessment Of Riversmentioning

confidence: 99%

The Biological Assessment and Rehabilitation of the World’s Rivers: An Overview

Feio

Hughes

Callisto

et al. 2021

Water

113

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The biological assessment of rivers i.e., their assessment through use of aquatic assemblages, integrates the effects of multiple-stressors on these systems over time and is essential to evaluate ecosystem condition and establish recovery measures. It has been undertaken in many countries since the 1990s, but not globally. And where national or multi-national monitoring networks have gathered large amounts of data, the poor water body classifications have not necessarily resulted in the rehabilitation of rivers. Thus, here we aimed to identify major gaps in the biological assessment and rehabilitation of rivers worldwide by focusing on the best examples in Asia, Europe, Oceania, and North, Central, and South America. Our study showed that it is not possible so far to draw a world map of the ecological quality of rivers. Biological assessment of rivers and streams is only implemented officially nation-wide and regularly in the European Union, Japan, Republic of Korea, South Africa, and the USA. In Australia, Canada, China, New Zealand, and Singapore it has been implemented officially at the state/province level (in some cases using common protocols) or in major catchments or even only once at the national level to define reference conditions (Australia). In other cases, biological monitoring is driven by a specific problem, impact assessments, water licenses, or the need to rehabilitate a river or a river section (as in Brazil, South Korea, China, Canada, Japan, Australia). In some countries monitoring programs have only been explored by research teams mostly at the catchment or local level (e.g., Brazil, Mexico, Chile, China, India, Malaysia, Thailand, Vietnam) or implemented by citizen science groups (e.g., Southern Africa, Gambia, East Africa, Australia, Brazil, Canada). The existing large-extent assessments show a striking loss of biodiversity in the last 2–3 decades in Japanese and New Zealand rivers (e.g., 42% and 70% of fish species threatened or endangered, respectively). A poor condition (below Good condition) exists in 25% of South Korean rivers, half of the European water bodies, and 44% of USA rivers, while in Australia 30% of the reaches sampled were significantly impaired in 2006. Regarding river rehabilitation, the greatest implementation has occurred in North America, Australia, Northern Europe, Japan, Singapore, and the Republic of Korea. Most rehabilitation measures have been related to improving water quality and river connectivity for fish or the improvement of riparian vegetation. The limited extent of most rehabilitation measures (i.e., not considering the entire catchment) often constrains the improvement of biological condition. Yet, many rehabilitation projects also lack pre-and/or post-monitoring of ecological condition, which prevents assessing the success and shortcomings of the recovery measures. Economic constraints are the most cited limitation for implementing monitoring programs and rehabilitation actions, followed by technical limitations, limited knowledge of the fauna and flora and their life-history traits (especially in Africa, South America and Mexico), and poor awareness by decision-makers. On the other hand, citizen involvement is recognized as key to the success and sustainability of rehabilitation projects. Thus, establishing rehabilitation needs, defining clear goals, tracking progress towards achieving them, and involving local populations and stakeholders are key recommendations for rehabilitation projects (Table 1). Large-extent and long-term monitoring programs are also essential to provide a realistic overview of the condition of rivers worldwide. Soon, the use of DNA biological samples and eDNA to investigate aquatic diversity could contribute to reducing costs and thus increase monitoring efforts and a more complete assessment of biodiversity. Finally, we propose developing transcontinental teams to elaborate and improve technical guidelines for implementing biological monitoring programs and river rehabilitation and establishing common financial and technical frameworks for managing international catchments. We also recommend providing such expert teams through the United Nations Environment Program to aid the extension of biomonitoring, bioassessment, and river rehabilitation knowledge globally.

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Section: Biological Assessment Of Riversmentioning

confidence: 99%

The Biological Assessment and Rehabilitation of the World’s Rivers: An Overview

Feio

Hughes

Callisto

et al. 2021

Water

113

View full text Add to dashboard Cite

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“…Its temporal evolution was also observed in the studies of and Martinelli et al (1999). The presence of nitrate in surface water can be linked either to the contributions from agricultural processes (e.g., leaching of fertilizer containing nitrate) or to the transformation into nitrate of ammonium coming from domestic or animal discharge (Djabri, 1996;El Ouali Lalami et al, 2011;Errochdi et al, 2012). The maximum sulfate concentrations were recorded during the pluvial period, possibly because of the leaching of the evaporitic deposits from the gypsiferous formation and mines operated in the catchment (Purdy et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

Effect of the physico-chemical parameters on the distribution of the fecal flora in a dam reservoir (Algeria)

Arab¹,

Arab²

2017

revec

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Effet des paramètres physico-chimiques sur la distribution de la flore fécale dans un barrage (Algérie) La présente étude a été effectuée en vue d’évaluer l’influence des fluctuations des paramètres environnementaux sur la charge et la distribution des différentes populations bactériennes d’origine fécale dans le barrage de Boukourdane (Algérie). Le suivi a été établi pendant deux ans (janvier 2013 – janvier 2015) au niveau de quatre stations. Le dénombrement des germes fécaux a été effectué en surface et en profondeur. Le suivi des paramètres bactériologiques a révélé une variation saisonnière, les charges bactériennes enregistrées sont assez élevées surtout durant les saisons froides (hiver et automne). L’analyse canonique de correspondances (ACC) de l’ensemble des données obtenues fait apparaître le rôle significatif de la conductivité, des ortho-phosphates et du pH sur le développement des streptocoques fécaux. L’ACC montre également l’effet des variations saisonnières et des ions sulfates sur la répartition des anaérobies sulfito-réducteurs. Concernant les coliformes totaux ils sont liés à la température de l’eau et les coliformes fécaux aux ions nitrates et à l’oxygène dissous.

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“…(WHO, 2017). Il faut aussi noter que la consommation d'eau douce engendre inéluctablement une pollution par le rejet des eaux usées menaçant directement la qualité de l'eau et l'intégrité des écosystèmes aquatiques voire la santé humaine (Errochdi et al, 2012). La qualité de l'eau est alors un facteur influençant l'état de santé et de mortalité à la fois chez l'homme et les animaux (Kazi et al, 2009) …”

Section: Abstract: Water Resources Faecal Contamination Physical Quunclassified

Pollution Physique Et Bactériologique De L’eau Du Fleuve Dans La Basse Vallée De L’ouémé Pendant Les Périodes De Basses Et Hautes Eaux Au Bénin

Adjagodo¹,

Tchibozo

Kèlomé

et al. 2017

ESJ

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The objective of this study is to assess the water river quality of the Lower Valley of Ouémé in Benin. Two river water sampling campaigns were carried out during low and high water. At each sampling campaign, eleven (11) sampling sites were selected and at each site four samples were taken, making a total of 44 water samples. Hydrogen potential, dissolved oxygen, suspended matter and turbidity were measured in situ. Fecal contamination germs such as total coliforms, thermotolerant coliforms, Escherichia coli and European Scientific Journal November 2017 edition Vol.13, No.33 ISSN: 1857 -7881 (Print) e -ISSN 1857 168 fecal enterococci were counted by the membrane filtration technique. The results of the physical analyzes reveal that the pH measured in the water samples conformed to the WHO standard except turbidity. The results of the bacteriological analyzes in 100 mL of water sample of the river reveal average bacterial loads in periods of low and high waters which vary respectively from 2.57.10 2 ± 451 CFU and 3.35.10 2 ± 459 CFU for total coliforms; 1.42.10 2 ± 315 CFU and 1.55.10 2 ± 251 for thermotolerant coliforms; 0,79.10 2 ± 216 CFU and 1.55.10 2 ± 251 for E. coli. The Enterococci are absent in the waters during these two periods. The high burden of these germs counted in the high water period may be due runoff phenomenon and unhygienic behavior observable in the study area. 2 ± 251 pour Coliformes thermotolérants ; 7,9.10 1 ± 216 UFC et 1,55.10 2 ± 251 pour E. coli. Les Entérocoques sont absents dans les eaux pendant ces deux périodes. La forte charge en ces germes dénombrés au cours de la période de hautes eaux peut être due au phénomène de ruissellement et à des comportements non hygiéniques observables dans la zone d'étude.

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Study of physicochemical and microbiological quality of two north Moroccan hydrographic networks: Laou and Tahaddart

Cited by 14 publications

References 1 publication

The Biological Assessment and Rehabilitation of the World’s Rivers: An Overview

The Biological Assessment and Rehabilitation of the World’s Rivers: An Overview

Effect of the physico-chemical parameters on the distribution of the fecal flora in a dam reservoir (Algeria)

Pollution Physique Et Bactériologique De L’eau Du Fleuve Dans La Basse Vallée De L’ouémé Pendant Les Périodes De Basses Et Hautes Eaux Au Bénin

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