Facultad de Ciencias Químicas

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Browsing Facultad de Ciencias Químicas by Author "Abad Crespo, Lorena Cristina"

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    Determinación de la adaptabilidad de los anfibios a través de la caracterización en los diez hábitats construidos en la zona urbana de Cuenca
    (2018) Salto Sari, José Fernando; Mejía Coronel, Julio Danilo; Abad Crespo, Lorena Cristina
    The artificial habitats built in the urban area of the city of Cuenca, is the first attempt to conserve the species Gastrotheca sp, these spaces provide the necessary conditions for the development and protection of this species. However, various processes of natural and anthropic pollution, as well as abrupt changes in environmental conditions, have negatively influenced the adaptation of this species to its new habitat. This problem has generated the need to develop methodologies to characterize the state of artificial habitats. The program of Conservation of Urban Biodiversity, developed by the Environmental Management Commission (CGA), aims to conserve the Marsupial Frog of Azuay (Gastrotheca sp), which is part of the heritage biodiversity of the city of Cuenca. That is why in this work, the abundance of Gastrotheca sp was correlated with the physicochemical parameters of water and environmental conditions in artificial habitats, in the period September - November 2017, with the objective of determining the variables correlated with the adaptability of amphibians. The nitrite parameter and the vegetation cover were the variables that influence the adaptation of the species Gastrotheca sp in artificial habitats.
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    Estimación de la concentración de material particulado menor a 10 micras a través de sensores remotos en el área urbana de la ciudad de Cuenca
    (2016) Abad Crespo, Lorena Cristina; Mejía Coronel, Julio Danilo
    The city of Cuenca presents high atmospheric pollution values due to a series of factors such as traffic, industrial activity, and urban expansion. Among the main pollutants for the city, particulate matter affects the citizen’s health and fauna and flora development due to their atmospheric interaction and permanence. This research study identifies an empirical equation to estimate particulate matter lessthan 10 micrometers in diameter (PM10) concentrations through correlations between in situ measurements of this pollutant with values derived from Cuenca’s urban area Landsat 8 satellite imagery. A multiple linear regression model is generated applying top of the atmosphere reflectance (TOA) and digital numbers (DN), which gives a multiple determination coefficient R2 of 0.55 and a p-value of 0.002, acceptable values according to literature. A PM10 distribution map is produced that allows the estimation of the pollutant’s concentration in places where the monitoring network has no coverage. To conclude, unlike the revised literature, the Aerosol Optical Depth (AOD) doesn’t present significant results for Cuenca, therefore working with TOA values. In addition, including thermal bands in the models improves substantially the correlation coefficient. However, there are certain locations where estimated PM10 values overpasses the average range, for which an in situ validation is suggested in the spots in question.