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Research article: Anthropic Impact Assessment of Coastal Ecosystems in the Municipality of Puerto Colombia, NE Colombia

Manuscript title: Anthropic Impact Assessment of Coastal Ecosystems in the Municipality of Puerto Colombia, NE Colombia

Authors: Marianella Bolívar, Germán Rivillas-Ospina, William Fuentes, Andrés Guzmán, Luis Otero, Gabriel Ruiz, Rodolfo Silva, Edgar Mendoza, Mauro Maza, Lina García, Yeison Berrío

J. of Coastal Research, 92(sp1):112-120 (2019).

link: https://www.jcronline.org/doi/pdf/10.2112/SI92-013.1

Abstract: Human activity, mainly associated with the construction of coastal infrastructure, has caused ecological degradation to the coastal zone at Puerto Colombia, Colombia. Severe erosion attacked the ancient sandy spit that protected the municipality from wave energy to an extent that it completely disappeared. The groins constructed thereafter, with the aim of protecting the coast, have exacerbated the sediment imbalance, affecting the Balboa coastal wetland. At present, the coastline around Puerto Colombia is highly vulnerable; the remaining ecosystems are under severe pressure, and the population is at risk. Restoring the marine and terrestrial connectivity is key to improving this situation.

Keywords: Coastal processes; coastal infrastructure; Puerto Colombia coast; wetlands; ecological based approach

Review Article: Renewables energies in Colombia and the opportunity for the offshore wind technology

Review Article: Renewables energies in Colombia and the opportunity for the offshore wind technology

Journal of Cleaner Production, In Press (February 2019)

https://doi.org/10.1016/j.jclepro.2019.02.174

Abstract:

Global offshore wind technology shows increasing progress evidenced in the recent reports of wind power capacity, expectations of market expansion and international research projects. Colombia is privileged with several types of natural resources (e.g. wind, sun, water) but there is not a clear legal context to regulate sustainable and safe exploitation of the offshore wind energy considered non-conventional. The development of offshore wind technology in Colombia could attend the energy demand when the hydroelectric system presents low electricity generation during dry hydrological conditions and El Niño – South Oscillations events. This paper analyses international actions that have motivated different countries to establish strategies to reduce CO2, and their advances and challenges in implementing offshore wind technology. The review of the administrative framework of renewable energy in Colombia proved the lack of information for implementing offshore wind technology. Furthermore, the analysis of several studies of marine energies showed the need to increase the knowledge of offshore wind energy.

The local applying projects to generate electricity from non-conventional renewable energies are not considering offshore wind energy projects. Hence, this research analysed wind speed and calculated wind power density at different height levels, what evidenced magnitudes and positive trends what justify to increase the research in offshore wind energy in Colombia. As a result, the present document compiles technical, economic, administrative and legal information of the renewable energies in Colombia that may be used for taking decisions of different stakeholders and evidences the potential implementing offshore wind farms in areas near to the Colombian Caribbean coast. Colombia has great resources to implement offshore wind energy technologies, reducing the dependence on fossil fuels and substituting other systems when they cannot guarantee the energy offer.

Keywords: Wind energy; Offshore; Renewable energy; Colombia; Wind turbines

Reuso de residuos para constituir materiales de construcción

Quiero compartir con ustedes el artículo preparado a la revista Intellecta de la Universidad del Norte y divulgado a nivel nacional, sobre los trabajos realizados de la mano del profesor Pacheco y vinculados al desarrollo de maateriales de construcción que contemplan el reuso de residuos de otros procesos (industriales y de consumo).

"Materiales de construcción hecho con residuos"

Research Article: Alternative Method to Determine Extreme Hydrodynamic Forces with Data Limitations for Offshore Engineering

Research Article: Alternative Method to Determine Extreme Hydrodynamic Forces with Data Limitations for Offshore Engineering

Journal of Waterway, Port, Coastal, and Ocean Engineering, Vol. 145, Issue 2 (March 2019)

https://doi.org/10.1061/(ASCE)WW.1943-5460.0000499

Abstract:

This study aims to identify limitations during hydrodynamic forces estimation in offshore design standards, such as the RP 2A-WSD-2014, and presents an alternative method to estimate the hydrodynamics forces considering nonlinearities due to ocean–atmosphere interaction. La Guajira, Colombia, was the location as a study case for the proposed method. Simulating waves nearshore (SWAN) and Delft3D models were adapted for three scenarios of extreme waves. The calculation of hydrodynamic force profiles through the RP 2A-WSD-2014 method and the proposed method shows that the traditional method cannot reproduce current profiles associated to hydrodynamic nonlinear interactions. The analysis included sensitivity tests for the hydrodynamic model data; also, a structural numerical model using SAP2000 was built to assess the structural stability of a ductile monopile structure (stress and deformation analysis). The structural model intends to generate a contribution for predesign and reliability considerations. Finally, the method contributes to solve the data restrictions and guide to engineers to set objective security factors considering the theoretical profiles and numerical modeling.

Keywords:  Offshore structures; Hydrodynamic forces; Offshore engineering; Numerical modeling; Structural analysis.
 

ACI Student Chapter at Universidad del Norte

American Concrete Institute (ACI) Student Chapter at Universidad del Norte was approved on December 18, 2017. Congratulations for all our CE (Civil Engineering) undergraduate students!

http://www.concrete.org/