Video Experimental Relacionado
Updated: Sep 10, 2025
14:44
Field Collection and Laboratory Maintenance of Canopy-Forming Giant Kelp to Facilitate Restoration
Published on: June 7, 2024
1.8K
Transformación costera no intencionada por infraestructura a pequeña escala y cambio en el uso de la tierra
Warit Charoenlerkthawin1,2, Chaiyut Charoenphon3, William C Burnett4
1Department of Water Resources Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
Scientific reports
|August 22, 2025
Resumen
El desarrollo costero cerca de Ban Khlong Wan (BKW) cambió las playas de arena a barro. La infraestructura interrumpió el flujo de sedimentos, mientras que la conversión de los humedales a la acuicultura aumentó el lodo, impulsando el cambio costero.
Área de la Ciencia:
- Geomorfología costera
- Ciencias del medio ambiente
- Ciencias marinas
Sus antecedentes:
- La costa de Ban Khlong Wan (BKW) en el Golfo Medio de Tailandia se enfrenta a disputas ambientales relacionadas con el desarrollo costero.
- Estudios anteriores sugirieron que las estructuras de protección costera causaron cambios en el material de la playa.
Objetivo del estudio:
- Investigar el impacto del desarrollo costero a pequeña escala en los cambios del material de la playa en BKW.
- Identificar las principales causas de la transformación de la playa de arenosa a fangosa.
Principales métodos:
- Análisis del cambio de la línea de costa
- Observaciones LiDAR de alta resolución
- Caracterización del material de playa
- Evaluación del cambio en el uso de la tierra
Principales resultados:
- La costa se mantuvo arenosa hasta 2002, con cambios mínimos de la línea costera.
- El muelle pesquero y la construcción de estructuras duras (2004-2008) interrumpieron el transporte de sedimentos, causando acumulación y déficits de arena localizados.
- La conversión de 100 ha de humedales a la acuicultura aumentó el aporte de sedimentos fangosos, lo que contribuyó a la formación de llanuras de barro.
- Si bien los diques y rompeolas estabilizaron las costas, el principal factor fue el cambio de suministro de sedimentos de arena a lodo.
Conclusiones:
- La infraestructura costera interrumpió la dinámica natural del transporte de sedimentos.
- El cambio de uso de la tierra, específicamente la conversión de humedales para la acuicultura, aumentó significativamente el aporte de sedimentos fangosos.
- La gestión costera integrada es crucial, teniendo en cuenta la infraestructura, los procesos de sedimento y las interacciones de uso de la tierra para el desarrollo sostenible.
Videos de Conceptos Relacionados
01:22Effect of Sea Water on Concrete
446
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks,...
Concrete in areas between tide marks,...
446
02:31Habitat Fragmentation
17.9K
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
17.9K
01:17Design Example: Analyzing Capacity Contours for Flood Risk Assessment
101
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
101
01:19Design Example: Maintaining Level of an Embankment
122
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
122
01:50Global Climate Change
24.7K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.7K
01:26Unsoundness of Aggregate due to Volume Change
174
Unsoundness in aggregates due to volume changes is primarily caused by the physical alterations aggregates undergo, such as freezing and thawing, thermal changes, and wetting and drying. Unsound aggregates, when subjected to these changes, result in volume change upon disintegration. This, in turn, contributes to the deterioration of concrete, including scaling, pop-outs, and cracking. Particular types of aggregates, such as porous flints, cherts, and those containing clay minerals, are...
174