Browsing by Author "Rivera Ochoa, Carlos Santiago"

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    Análisis de la dinámica hidrólogica en cuencas de Páramo húmedo: estudio de caso a la escala de ladera
    (2014) Rivera Ochoa, Carlos Santiago; Crespo Sánchez, Patricio Javier
    The main component of the “Páramo” ecosystem is the soil. The Andosol, located on the hillslopes with tussock grass is the broadest coverage in such basins, under the Andosol is the mineral horizon (C). However, there is a gap in the knowledge of hydrological dynamics in “Páramo” hillslopes related to its temporal and spatial variability. The study was conducted on a 22m length and 20% slope located in the upper part of the Zhurucay river basin, located in Azuay Province in southern Ecuador using a network of soil moisture and matrix soil tension sensors. The sensors are distributed across the different horizons (Ah-C) along the slope at 5 positions (C1-C5). The temporal variability was found to be influenced predominantly by the volume of the rain event. Values lower than 1.11 mm are intercepted in the tussock grass. Most registered events enter across the horizon Ah. Events with a higher rainfall amount than 10mmenterthemineralhorizon.Interms of spatialvariability, thevolume storedineachpositionshows that C4 has thegreater volumestorage capacityand also regulatestheside flowofthe upper positions(C1-C3); whileC5, indespite of receivinghigh income of side flowevacuateswater intothe channel. It was concluded thatthe hillslopegrasslandcoverageplaysthe role of water flowregulator.Forhigh amount rainfall events, the three horizonsevacuatelow rates of water that haveenteredtheprofilesoil, whereas in droughts only thehorizon Ah.
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    Evaluación de la calidad del agua de los ríos de la ciudad de Cuenca, Ecuador
    (2019) Abril Novillo, Andrea Soledad; Pauta Calle, Gladys Guillermina; Rivera Ochoa, Carlos Santiago; Morales Matute, Oscar Patricio; Velasco Heras, María Eugenia; Gutiérrez Sarmiento, Daniela Liliana; Vázquez Guillen, Gabriela Belén
    The water quality of the Tarqui, Yanuncay, Machángara and Tomebamba rivers, tributaries of the Paute river was evaluated. Due to the need to incorporate new approaches in the water quality monitoring, this study applied the widely known water quality index (WQI) but, instead of using the 9 parameters originally required by the method, we used 18 physicochemical and microbiological parameters. For each river, nine monitoring campaigns were carried out, covering representative hydrological periods and measuring flow discharges. The results show that, in general, in the areas of river catchment, the water resource is suitable for almost all types of use, but gradually, as it progresses downstream, the quality decreases due to sanitary or industrial wastewater and to natural factors such as runoff or erosion sediments. The most critical condition of the evaluated river’s water quality was presented during drought conditions, mainly due to the decrease in dissolved oxygen and the increase in temperature, salinity, organic matter and coliform bacteria. On the other hand, during rainy periods, parameters indicating a decrease of water quality were color, turbidity, and nutrient content such as phosphorus and nitrogen. In general, rivers have better quality for medium flow conditions, which prevail during most of the year. The present results were analyzed in accordance with the quality objectives established in previous studies, allowing a qualitative evaluation of the wastewater interception and treatment system of the city of Cuenca, Ecuador.