Increased megafauna stranding risk from sand mining: Lessons from the Yangtze finless porpoise

Biological Conservation, Journal Year: 2025, Volume and Issue: 306, P. 111111 - 111111

Published: March 30, 2025

Language: Английский

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Flood susceptibility assessment using deep neural networks and open-source spatial datasets in transboundary river basin

VIETNAM JOURNAL OF EARTH SCIENCES, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

The Mekong Basin is the most critical transboundary river basin in Asia. This provides an abundant source of fresh water essential for development agriculture, domestic consumption, and industry, as well production hydroelectricity, it also contributes to ensuring food security worldwide. region often subject floods that cause significant damage human life, society, economy. However, flood risk management challenges this are increasingly substantial due conflicting objectives between several countries data sharing. study integrates deep learning with optimization algorithms, namely Grasshopper Optimisation Algorithm (GOA), Adam Stochastic Gradient Descent (SGD), open-source datasets identify probably occurring basin, covering Vietnam Cambodia. Various statistical indices, Area Under Curve (AUC), root mean square error (RMSE), absolute (MAE), coefficient determination (R²), were used evaluate susceptibility models. results show proposed models performed AUC values above 0.8, specifying DNN-Adam model achieved 0.98, outperforming DNN-GOA (AUC = 0.89), DNN-SGD 0.87), XGB 0.82. Regions very high concentrated Delta along River findings supporting decision-makers or planners proposing appropriate mitigation strategies, planning policies, particularly watershed.

Language: Английский

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How consistent are adaptation strategies with ongoing climatic and environmental changes in the Vietnamese Mekong Delta: A systematic review

Environmental Science & Policy, Journal Year: 2025, Volume and Issue: 168, P. 104064 - 104064

Published: April 21, 2025

Language: Английский

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Incorporating stakeholder perception into risk assessment model: an empirical study of highway construction projects

Engineering Construction & Architectural Management, Journal Year: 2025, Volume and Issue: unknown

Published: April 23, 2025

Purpose Large infrastructure projects encounter diverse risks, yet existing risk assessment (RA) models often overlook key stakeholder perspectives. This study addresses the gap by combining insights from both public and private sector stakeholders into an innovative RA model. Design/methodology/approach The examined Vietnam’s Mekong Delta highway through two targeted surveys to capture perceptions of factors. Statistical analysis fuzzy synthetic evaluation (FSE) methods were utilized identify critical factors (CRFs), primary groups (PRGs), overall levels (ORLs) Subsequently, seven professional experts re-evaluated CRFs, validated proposed model, confirmed its applicability for upcoming projects. Findings identified twenty-two CRFs grouped them five PRGs. Land acquisition compensation issues material price fluctuations are most prominent while commercial natural environment risks significant components. Notably, perceive higher than counterparts across almost categories indexes. Practical implications contributes improving RM practices project outcomes in construction developing this stakeholder-driven It also provides ready-to-use registers actionable strategies, facilitating with practical tools effective RM. Key recommendations include (1) flexible land policies streamlined processes, (2) adjustment mechanisms contracts, early engagement address regulatory environmental concerns proactively. Originality/value introduces a novel, addressing between theoretical frameworks real-world applications. offers structured data-driven approach identification prioritization, applicable not only but similar worldwide. findings contribute advancing management (RM) theory delivering policymakers, managers, investors strengthen decision-making resilience.

Language: Английский

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Experimental Analysis of Thermal Conductivity and Volumetric Heat Capacity in Concrete Incorporating HDPE Waste Plastic Powder as a Function of Temperature

Civil and Environmental Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 17, 2025

Abstract The objective of this study is to comprehensively investigate the influence incorporating high-density polyethylene (HDPE) waste plastic on thermophysical properties ordinary concrete, by partially replacing sand with HDPE powder. samples (cement, sand, HDPE, and concrete) were characterized using advanced analytical techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), fluorescence (XRF). These analyses confirmed that incorporation powder does not induce significant alterations in internal microstructure composite material. Thermophysical measured a CT-Meter for various substitution rates (5–30% weight) at different temperatures (25°C, 30°C, 40°C, 50°C) thermoregulated box. results demonstrated progressive decrease thermal conductivity diffusivity increasing content. Furthermore, volumetric heat capacity increased as 5% was added, then decreased. This phenomenon observed all analysed, except 25°C. Moreover, into concrete significantly altered its properties, leading reduction performance.

Language: Английский

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Placing Islands at Risk: Developmentalism, Militarism, Geopolitics, and the Sendai Framework for Disaster Risk Reduction

International Journal of Disaster Risk Science, Journal Year: 2024, Volume and Issue: unknown

Published: July 29, 2024

Abstract Islands have come to be seen as a distinct object of disaster risk and climate change policy research. This is reflected in the Sendai Framework for Disaster Risk Reduction 2015–2030 (SFDRR), which specifies Small Island Developing States (SIDS) need specialized policies, attention, support. article directs an island studies perspective toward SFDRR, discussing obstacles framework’s implementation contexts. Focus placed on two interrelated sets issues: (1) problematic aspects concepts “development” it applied islands (particularly SIDS category); (2) international cooperation, militarism, geopolitics. The study found that although societies can benefit from attention brought them by framework engages rhetoric may limit possibilities potentials while distracting more fundamental changes should made other state non-state actors.

Language: Английский

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Recurrence interval of riverbed sand mining hotspots in the Mekong delta: Potential indications of unsustainable replenishment rates

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 370, P. 122435 - 122435

Published: Sept. 12, 2024

Language: Английский

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Coastal Flooding in Asian Megadeltas: Recent Advances, Persistent Challenges, and Call for Actions Amidst Local and Global Changes

Reviews of Geophysics, Journal Year: 2024, Volume and Issue: 62(4)

Published: Dec. 1, 2024

Abstract Asian megadeltas, specifically the Ganges‐Brahmaputra‐Meghna, Irrawaddy, Chao Phraya, Mekong, and Red River deltas host half of world's deltaic population are vital for countries' ecosystems food production. These extremely vulnerable to global change. Accelerating relative sea‐level rise, combined with rapid socio‐economic development intensifies these vulnerabilities calls a comprehensive understanding current future coastal flood dynamics. Here we provide state‐of‐the‐art on knowledge recent advances in quantifying drivers flood‐related hazards deltas. We discuss environmental physical drivers, including climate influence, hydrology, oceanography, geomorphology, geophysical processes how they interact from short long‐term changes, during extreme events. also jointly examine human disturbances, catchment interventions, land use changes resource exploitations, contribute flooding Through systems perspective, characterize state essential insights shaping their sustainable trajectories regarding multifaceted challenges flooding.

Language: Английский

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Landscape and Social Disruption from Sand Mining and Mining-Related Activities: A Case from the Vietnamese Mekong Delta

Annals of the American Association of Geographers, Journal Year: 2024, Volume and Issue: 114(9), P. 1968 - 1984

Published: July 16, 2024

Language: Английский

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Severe decline in extent and seasonality of the Mekong plume after 2000

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 132026 - 132026

Published: Sept. 1, 2024

Language: Английский

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