Submersion de la voie Godomey-Calavi au droit du Djonou
La submersion observée sur l’axe Godomey-Calavi au niveau du Djonou rappelle la nécessité de mieux comprendre ce secteur. Le Djonou est souvent décrit comme une rivière ou un exutoire local. Pourtant, les images satellitaires et les données hydrologiques disponibles montrent plutôt un système humide complexe, au fonctionnement non linéaire, fortement influencé par les pluies successives, […]
Comprendre les paramètres de qualité des eaux de surface
Commissioning-phase hydraulic loading and influent quality of a market-fed wastewater plant in Parakou, Bénin: baseline data for adaptive management
Wastewater plants (WWPs) are widely recognised as nature-based solutions for wastewater management in West Africa, yet empirical data from their commissioning phase remain limited. This study investigates the rehabilitated Arzêké WWP in Parakou, Bénin, which treats wastewater from a large urban market through a three-stage anaerobic, facultative, and maturation pond system. A two-phase monitoring protocol […]
Characterizing nutrient pollution in urban well water using hydrochemical, statistical, and remote sensing methods.
In peri-urban areas where access to potable water is limited, groundwater from water table frequently constitutes the primary source of water, despite its susceptibility to contamination from human activity. The present study, conducted in Abomey-Calavi (Benin Republic), sought to identify the key factors influencing nitrogen and phosphorus pollution in well water. Thirty wells were sampled […]
Sediment-mediated eutrophication in coastal lagoons: A systematic review of benthic nutrient fluxes and management implications
Shallow coastal lagoons are among the ecosystems most vulnerable to eutrophication; their sediments, which act as nutrient reservoirs under oxic conditions, become diffuse sources of nitrogen and phosphorus in hypoxic conditions, prolonging the eutrophic state despite reduced external inputs. This systematic review, conducted according to PRISMA-ScR, searched Web of Science, Scopus and Google Scholar; 82 […]
Multivariate assessment of riverine water quality in the Ouémé Delta (Benin): ecological suitability and adaptive monitoring design.
Riverine water quality in data-limited deltas is a subject that has received little attention, despite their high biodiversity value and rising agricultural and urban pressures. The present study establishes a baseline for the lower Ouémé Delta (Benin), focusing on the Ouémé and Sô rivers, and tests compact indicators for management. Monthly sampling over 24 months […]
Ecological patterns in the Porto-Novo Lagoon (Benin, West Africa): A review with implications for SDG 6.3.2 and EU-WFD readiness toward ecological status classification.
Urban tropical lagoons provide vital services yet face nutrient loading, macrophyte blooms, and episodic hypoxia. This scoping review compiles four decades of hydromorphological, physico-chemical, and biotic evidence for Benin’s Porto-Novo Lagoon and assesses readiness for UNEP SDG 6.3.2 Level 1 reporting and a EU Water Framework Directive (WFD)-oriented exploratory gap analysis rather than an operational […]
Assessment of benthic nutrient fluxes from muddy sediments: The case of Lake Nokoué in West Africa.
The muddy sediments of shallow coastal lakes, such as Lake Nokoué, are important reservoirs of organic matter and nutrients, playing a key role in eutrophication processes. This study assesses the benthic flux of nitrogen and phosphorus from these sediments by incubating core samples in the laboratory for 24 h under different light and hydrodynamic conditions. The […]