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  1. Article ; Online: Evaluación de resultados

    Henry Emilio Delgado Anchundia / Eduardo Ortiz Hernández

    RECUS, Vol 7, Iss 2, Pp 26-

    proyectos de obras hidráulicas en Manta y Montecristi, 2015 – 2019

    2022  Volume 33

    Abstract: El presente artículo comprendió el desarrollo y la aplicación metodológica de la evaluación por resultados en proyectos de construcción hidráulica bajo procesos establecidos por la metodología de Evaluación del Sistema Integrado de Planificación e ... ...

    Abstract El presente artículo comprendió el desarrollo y la aplicación metodológica de la evaluación por resultados en proyectos de construcción hidráulica bajo procesos establecidos por la metodología de Evaluación del Sistema Integrado de Planificación e Inversión Pública acorde con lo propuesto por la Comisión Económica para América Latina y el Caribe. Se evaluaron criterios de pertinencia, eficiencia, eficacia, impacto y sostenibilidad, que permitieron cuantificar el desarrollo sustentable de la infraestructura hidráulica en los cantones Manta y Montecristi, en proyectos durante el periodo 2015-2019. En Ecuador son escasos los procedimientos donde se establece una evaluación a fin de retroalimentar los procesos de los proyectos y adquirir lecciones aprendidas. Los resultados mostraron una efectividad del 61 % en promedio según las encuestas para los tres proyectos evaluados del cantón Manta, a diferencia del 62 % en promedio porcentual de efectividad de los dos proyectos evaluados del cantón Montecristi. El cumplimiento de los indicadores de los proyectos en análisis es calificado entre bueno y regular. Se concluye que los proyectos de infraestructura hidráulica ejecutados tuvieron un impacto positivo que aseguran un desarrollo sustentable, pero requieren de mantenimiento preventivo y operacional para que no reflejen un descontento social.
    Keywords evaluación expost ; mejora continua ; efectividad ; infraestructura hidráulica ; social ; Special aspects of education ; LC8-6691 ; Social sciences (General) ; H1-99
    Language English
    Publishing date 2022-09-01T00:00:00Z
    Publisher Universidad Técnica de Manabí
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Assessing Susceptibility to Soil Liquefaction Using the Standard Penetration Test (SPT)—A Case Study from the City of Portoviejo, Coastal Ecuador

    Eduardo Ortiz-Hernández / Kervin Chunga / José Luis Pastor / Theofilos Toulkeridis

    Land, Vol 11, Iss 463, p

    2022  Volume 463

    Abstract: The city of Portoviejo in coastal Ecuador was severely affected during the 16 April 2016, Pedernales earthquake (Mw 7.8). Various coseismic liquefaction phenomena occurred, inducing lateral spreading, sand boils, ground subsidence, and sinkholes in soils ...

    Abstract The city of Portoviejo in coastal Ecuador was severely affected during the 16 April 2016, Pedernales earthquake (Mw 7.8). Various coseismic liquefaction phenomena occurred, inducing lateral spreading, sand boils, ground subsidence, and sinkholes in soils with poor geotechnical quality in the alluvial and alluvial–colluvial sedimentary environment. Therefore, the main aim of this study was to collect data from standard penetration tests (SPT) and shear velocity and exploratory trenches and to calculate the liquefaction potential index (LPI) by considering a corresponding seismic hazard scenario with an a max = 0.5 g. From these data, a liquefaction hazard map was constructed for the city of Portoviejo, wherein an Fs of 1.169 was obtained. It was determined that strata at a depth of between 8 and 12 m are potentially liquefiable. Our quantitative results demonstrate that the city of Portoviejo’s urban area has a high probability of liquefaction, whereas the area to the southeast of the city is less sensitive to liquefaction phenomena, due to the presence of older sediments. Our results are in accordance with the environmental effects reported in the aftermath of the 2016 earthquake.
    Keywords standard penetration test ; soil liquefaction ; earthquake hazard ; Pedernales earthquake ; Ecuador ; Agriculture ; S
    Subject code 550
    Language English
    Publishing date 2022-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Soil Liquefaction and Other Seismic-Associated Phenomena in the City of Chone during the 2016 Earthquake of Coastal Ecuador

    Eduardo Ortiz-Hernández / Kervin Chunga / Theofilos Toulkeridis / José Luis Pastor

    Applied Sciences, Vol 12, Iss 7867, p

    2022  Volume 7867

    Abstract: The city of Chone, being situated on the Ecuadorian coast, was affected due to the close-by epicenter of the earthquake of 16 April 2016, which reached a magnitude of Mw 7.8. This catastrophic event presented settlements in the ground, sand boils and ... ...

    Abstract The city of Chone, being situated on the Ecuadorian coast, was affected due to the close-by epicenter of the earthquake of 16 April 2016, which reached a magnitude of Mw 7.8. This catastrophic event presented settlements in the ground, sand boils and land subsidence, being the most damaging in a variety of civil works among these several buildings. The main objective of the current study is to select data using the standard penetration test (SPT) for the evaluation of the probability of liquefaction considering a maximum acceleration seismic risk of a max = 0.5 g. With the tabulated information, a liquefaction hazard map was generated for the city of Chone, where a safety factor of 1228 was obtained, determining the potentially liquefiable strata at an approximate depth between 9 and 11 m. Hereby, we were able to demonstrate results that were obtained experimentally through a quantitative analysis, indicating that the urban area of the city of Chone has a high probability of liquefaction, which was supported due to the presence of Holocene-aged soils developed in alluvial deposits, located in an alluvium mid catchment area. This novel research, due to the combination of a variety of used tools in the seismic risk evaluation, provides a relevant contribution to territorial planning and risk management in construction, in addition to the territorial reorganization of the canton as an example for different regions worldwide with similar geodynamics, soil mechanics and seismic vulnerabilities.
    Keywords standard penetration test (SPT) ; soil liquefaction ; Pedernales earthquake ; seismic vulnerability ; Ecuador ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
    Subject code 550
    Language English
    Publishing date 2022-08-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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