Morphological behavior of the Magdalena River delta (Colombia) due to intra and interannual variations in river discharge

Ávila, Boris; Gallo, Marcos Esteban

doi:10.1016/j.jsames.2021.103215

Cited by 7 publications

(2 citation statements)

References 20 publications

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“…Additionally, the river has a secondary mouth at Cartagena's and Barbacoas' bay where a 10th of the streamflow is discharged through an artificial structure called "Canal del Dique." The waters from this river also represent an important influx of fresh water for the largest and most complex of Colombia's swamp marshes: the "Cienaga Grande de Santa Marta -CGSM" (Restrepo et al, 2016;Ávila and Gallo, 2021) which is connected to the Magdalena River through various canals and, depending on the climate and hydrological conditions (i.e., dry/wet season along the Magdalena basin) and other forcing variables such as tides and wind, the fluxes on some of these canals can come to a halt or even flow in the opposite direction (i.e., from the Cienaga towards the River). Figure 1 provides a simplified graphical representation of the Magdalena River basin and its connection to the Caribbean Sea.…”

Section: Study Areamentioning

confidence: 99%

“…On the other hand, the Endogenic Managed Pressures (EnMP) are those that occur within the study area and can be directly managed. Some examples are littering and waste generation, nutrients and other contaminants inputs, untreated or inadequately treated wastewater disposal to soil and water bodies, deforestation, infrastructure construction, irruption of sediment inputs and the littoral drift, introduction of alien species, among others (Tosic et al, 2018;Rangel-Buitrago et al, 2019;Chacon et al, 2020;Portz et al, 2020;Torres-Bejarano et al, 2020;Villate et al, 2020;Rangel-Buitrago et al, 2021;Ávila and Gallo, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the Magdalena River delta socio-ecological system through the Circles of Coastal Sustainability framework

2023

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River-mouth systems and deltas are hotspots where many of the coastal syndromes can be found. Moreover, these systems provide essential ecosystem services (e.g., recreation, food provisioning, protection against natural hazards). The present study focuses on the socio-ecological system at the delta of the Magdalena River in the central Caribbean Region in Colombia. This research seeks to assess the multidimensional sustainability of the Magdalena river-mouth system (MRm-SES) to improve the knowledge basis for its integrated management. To do so, an assessment tool named “Circles of Coastal Sustainability” (CCS) was used to evaluate the system splitting it into four domains (environmental, social, economic and governance) that were divided into 5 categories each. These domains were evaluated through a total of 52 indicators distributed like this: 16 for the Environmental domain, 16 for the Economic domain, 12 for the Social and Cultural domain and, 8 for the Governance domain. The results show that the overall sustainability of the MRm-SES is classified as “Satisfactory.” None of the domains is in “Excellent” or “Bad” conditions. However, the evaluation of the categories shows that four (4) of them have “Poor” conditions (i.e., Social Benefits, Demographics, Economic Security, and Resources Management). Hence, it is recommended to put those categories at the centre of the discussion to define management strategies (e.g., Preserving and restoring habitats; tackling sources of pollution and excessive sediment; local reduction of net Greenhouse Gas and adaptation to climate change; participation of local communities in the management design and implementation), without disregarding the interrelation with the other categories and dimensions. Finally, it is argued that despite all the improvement opportunities, the CCS is a valuable tool to evaluate and communicate with different stakeholders (academic community, managers and decision-makers, local communities, etc.), to improve the sustainability of coastal systems in Colombia and the world.

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Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of the Magdalena River delta socio-ecological system through the Circles of Coastal Sustainability framework

2023

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Influence of River Discharge and Tides on the Salinity Structure at the Magdalena River Estuary

Cardona,

Álvarez-Silva,

Barrios

et al. 2024

Estuaries and Coasts

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The salinity structure in the Magdalena River estuary results from a massive river discharge and a micro-tidal regime over a narrow-deep channel. Both environmental forcings are analyzed here to assess their effects on the temporal and spatial variability of the estuarine system. We investigated long-term (seasonal to interannual) and short-term (diurnal) changes in salinity structure and circulation through in situ measurements and a 3D hydrodynamic model ensemble (21 model runs). The measurements cover low (below 10th percentile) and mean river discharge conditions. Results show that the Magdalena River estuary (MRE) behaves as a strongly stratified system during the dry season (February to April) and as a vertically homogeneous one during the wet and transitional seasons when the river plume exhibits a lift-off regime at the mouth. A river discharge threshold has been found for the estuary to lift-off regime transition, corresponding to the 30th percentile (5200 m3/s). At the seasonal scale, the salinity intrusion length in the MRE shows more reactivity to river discharge variability than other reported strongly stratified estuaries; it is reflected in the scaling factor $$n$$ n in the relationship $$L\sim {Q}^{-n}$$ L ∼ Q - n . A $$n$$ n value of 3.9 is the best fit for the MRE; nevertheless, it follows the Schijf and Schönfeld theoretical model solution for a prismatic flat configuration. Micro tides modulate the salinity intrusion on the diurnal cycle with a more significant effect on salinity intrusion and water exchange than previously reported, particularly during low discharge conditions. The findings from measurements and model scenarios for the MRE can be broadly applied and stand for an exemplary tropical, micro-tidal, anthropogenic intervened system.

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Prospect and development of energy extraction using salinity gradients in Colombia: a case study

Purkait,

Sharma,

Das

et al. 2024

Blue Energy Extraction Using Salinity Gradients

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Morphological behavior of the Magdalena River delta (Colombia) due to intra and interannual variations in river discharge

Cited by 7 publications

References 20 publications

Assessment of the Magdalena River delta socio-ecological system through the Circles of Coastal Sustainability framework

Assessment of the Magdalena River delta socio-ecological system through the Circles of Coastal Sustainability framework

Influence of River Discharge and Tides on the Salinity Structure at the Magdalena River Estuary

Prospect and development of energy extraction using salinity gradients in Colombia: a case study

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