Investigating Human Influence on Offshore Terrestrial Organic Carbon Trends in a High-Energy Delta: The Ayeyarwady Delta, Myanmar

Journal of Marine Science and Engineering, Journal Year: 2025, Volume and Issue: 13(1), P. 163 - 163

Published: Jan. 18, 2025

The continental margin is a major repository for organic carbon; however, anthropogenic alterations to global sediment and particulate terrestrial carbon (TerrOC) fluxes have reduced delivery by rivers offshore burial in recent decades. Despite the absence of mainstem damming, land use change Ayeyarwady Thanlwin River catchments Myanmar has accelerated over last 50 years. As result, deforestation landscape erosion likely altered fluvial Northern Andaman Sea shelf; magnitude preservation geochemical signals associated with development are unknown. Utilizing elemental bulk stable radioisotope analysis, this study investigates spatial temporal trends sources TerrOC concentrations identify potential impacts (<100 years) development. While our results demonstrate an along-shelf trend provenance concentrations, (downcore) not observed. We attribute observation frequent, large-scale seabed resuspension suggest that extensive mixing on inner shelf creates low-pass filter effectively attenuates such signatures. This contrast other large Asian deltas, where human disturbance clearly preserved offshore. predict planned damming will result larger supply may become apparent near future.

Language: Английский

---

The Great Mississippi River Flood of 1927: Morphodynamic Analysis of The Caernarvon Crevasse Event

Estuarine Coastal and Shelf Science, Journal Year: 2025, Volume and Issue: unknown, P. 109234 - 109234

Published: March 1, 2025

Language: Английский

---

Preserving coastal environments requires an integrated natural and cultural resources management approach

PNAS Nexus, Journal Year: 2025, Volume and Issue: 4(4)

Published: March 27, 2025

Integration of natural and cultural resource management is urgently needed to combat the effects climate change. Scientists must contend with how human-induced change rapid population expansion are fundamentally reworking densely inhabited coastal zones. We propose that a merger archaeology, environmental science, land policy-different yet intertwined domains-is address dramatic losses biocultural resources comprise coupled cultural-natural systems. demonstrate urgency such approaches through analyses archaeological regions within U.S. Atlantic Gulf coasts where sea level rise primary threat, we extend our findings globally an assessment risk factors forecasts for sites in Netherlands, Peru, Oceania. Results show across Coast Oceania, little hard infrastructure place protect sites, hundreds low-lying will be lost under future scenarios. In other coasts, like Rhine-Meuse Delta (the Netherlands), risks range from erosion caused by periods flooding degradation wetland extreme droughts. pressures pose agro-industrial growth, urban expansion, El Niño variability. Across all risks, strategies mitigate approached as restoration process linked sociocultural physical

Language: Английский

---

Nature-based solutions for coastal restoration during urbanization: Implications of a case study along Chaoyang Port Coast, China

Ocean & Coastal Management, Journal Year: 2025, Volume and Issue: 266, P. 107691 - 107691

Published: April 15, 2025

Language: Английский

---

Distributary development in a 21st century river: The evolution of Neptune Pass and its delta, the largest new offshoot of the Mississippi River

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(4), P. e0320502 - e0320502

Published: April 16, 2025

The development of distributaries in large river deltas plays an important role the geology, hydrology, and ecology coastal ocean, as rivers are a dominant mechanism by which particulate, suspended, dissolved material is delivered from continents to global ocean. And yet, there relatively little, near-real time observational data on -- part because modern observation coincides with era when have been controlled engineering projects (i.e., 20th 21 st centuries). This article reports Neptune Pass, largest new distributary form Mississippi River nearly century. It developed between 2019 2021 small canal rapidly expanded at least order magnitude. system now carries about 15–17% flow River, > 3,000 m 3 s -1 moderately high flows. comparable 10th North America 100th Earth. Pass building delta, this study sought examine whether delta comprised largely eroded (redistributed sediment hypothesis), or includes recently derived (new hypothesis). These hypotheses were tested using combination marine-geophysical surveys, remote sensing techniques, core collections. Results indicate that Quarantine Bay was 56–79% larger than excavated corroborating hypothesis, indicating it net land system. findings provide key insights critical restoration safe management its kind America.

Language: Английский

---

WETLAND LANDSCAPES OF THE LOWER PARANÁ RIVER FLOODPLAIN FROM AN ECO-HYDROGEOMORPHIC APPROACH

Journal of South American Earth Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 105558 - 105558

Published: May 1, 2025

Language: Английский

---

Delta sedimentary evolution: a comprehensive review and perspectives on construction and destruction

International Geology Review, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 25

Published: May 8, 2025

Language: Английский

---

Human flood adaptation characteristics: A comparative study of three global river deltas

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133531 - 133531

Published: May 1, 2025

Language: Английский

---

Delta-scale mapping of coastal erosion vulnerability at the modern Yellow River Delta and implications for geomorphic sustainability

Ocean & Coastal Management, Journal Year: 2025, Volume and Issue: 267, P. 107760 - 107760

Published: May 19, 2025

Language: Английский

---