Comprehensive bathymetry and intertidal topography of the
Amazon estuary

Fassoni‐Andrade, Alice César; Durand, Fabien; Moreira, Daniel Medéiros; Azevedo, Alberto; Santos, Valdenira Ferreira dos; Funi, Cláudia; Laraque, Alain

doi:10.5194/essd-2021-32

Cited by 2 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These sinks significantly reduce the amount of sediment reaching the ocean. Much of the coastal floodplain is submerged by high water in the rainy season [50]. A corollary of this situation is that parts of the subaerial delta, notably the smaller channels and some of the islands at the mouth of the north channel, are undergoing relatively rapid accretion according to Global Surface Water Explorer data [51], with high ratios of conversion of water to land, and smaller inverse ratios (Figure 3).…”

Section: Delta Hydrology Sedimentation and Geomorphologymentioning

confidence: 99%

Sustainable Management, Conservation, and Restoration of the Amazon River Delta and Amazon-Influenced Guianas Coast: A Review

Anthony

Brondízio

Santos³

et al. 2021

Water

View full text Add to dashboard Cite

The Amazon River delta may be currently characterized biophysically as a relatively preserved delta compared to the rampant vulnerability of many of the world’s large deltas. This status of relative preservation is reflected in a number of criteria: The still largely free-flowing nature of many of the rivers and the main stem of the Amazon that feed the delta in sediment, exceptional biodiversity, dominant shoreline accretion, and the absence of anthropogenically-generated subsidence. In this review, we show that these relatively reassuring conditions are progressively being called into question by the effects of dams on fluvial sediment supply to the delta, by increasing demographic, urban, and land development pressures in this still largely underpopulated delta, and by problems of governance that underplay aspects of basin-wide and deltaic environmental deterioration. A major challenge is that of bringing together these contrasting demands that are leading to the emergence of zones of environmental stress that test the resilience of this delta. An integral part of the strategy for the analysis of collective action, management, and conservation is that of considering the Amazon delta in terms of interacting socio-ecological systems. Pressures on the delta will be compounded in the future by decreasing fluvial sediment supply and sea-level rise. Although climate change is projected to generate surplus sediment, the rapid growth of dam constructions upstream of the delta will negatively impact the river’s sediment flux. Conservation and management of the Amazon River system aimed at keeping the delta resilient in the context of sea-level rise and reduction of sediment supply will require clear governance and better planning and anticipation, as well as socio-ecological integration. These are also requirements that will need to be implemented in the 1500 km-long coastal zone of the Guianas countries located west of the Amazon delta and the sediment dynamics and stability of which are largely determined by sediment supply from the Amazon.

show abstract

Section: Delta Hydrology Sedimentation and Geomorphologymentioning

confidence: 99%

Sustainable Management, Conservation, and Restoration of the Amazon River Delta and Amazon-Influenced Guianas Coast: A Review

Anthony

Brondízio

Santos³

et al. 2021

Water

View full text Add to dashboard Cite

show abstract

Comprehensive bathymetry and intertidal topography of the Amazon estuary

Fassoni‐Andrade

Durand

Moreira

et al. 2021

Earth Syst. Sci. Data

Self Cite

View full text Add to dashboard Cite

Abstract. The characterization of estuarine hydrodynamics primarily depends on knowledge of the bathymetry and topography. Here, we present the first comprehensive, high-resolution dataset of the topography and bathymetry of the Amazon River estuary, the world's largest estuary. Our product is based on an innovative approach combining spaceborne remote sensing data, an extensive and processed river depth dataset, and auxiliary data. Our goal with this mapping is to promote the database usage in studies that require this information, such as hydrodynamic modeling or geomorphological assessments. Our twofold approach considered 500 000 sounding points digitized from 19 nautical charts for bathymetry estimation, in conjunction with a state-of-the-art topographic dataset based on remote sensing, encompassing intertidal flats, riverbanks, and adjacent floodplains. Finally, our estimate can be accessed in a unified 30 m resolution regular grid referenced to the Earth Gravitational Model 2008 (EGM08), complemented both landward and seaward by land (Multi-Error-Removed Improved-Terrain digital elevation model, MERIT DEM) and ocean (General Bathymetric Chart of the Oceans version 2020, GEBCO_2020) topographic data. Extensive validation against independent and spatially distributed data, from an airborne lidar survey, from ICESat-2 altimetric satellite data, and from various in situ surveys, shows a typical vertical accuracy of 7.2 m (riverbed) and 1.2 m (non-vegetated intertidal floodplains). The dataset is available at https://doi.org/10.17632/3g6b5ynrdb.2 (Fassoni-Andrade et al., 2021).

show abstract

Comprehensive bathymetry and intertidal topography of the Amazon estuary

Cited by 2 publications

References 7 publications

Sustainable Management, Conservation, and Restoration of the Amazon River Delta and Amazon-Influenced Guianas Coast: A Review

Sustainable Management, Conservation, and Restoration of the Amazon River Delta and Amazon-Influenced Guianas Coast: A Review

Comprehensive bathymetry and intertidal topography of the Amazon estuary

Contact Info

Product

Resources

About