<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1683-0789</journal-id>
<journal-title><![CDATA[Acta Nova]]></journal-title>
<abbrev-journal-title><![CDATA[RevActaNova.]]></abbrev-journal-title>
<issn>1683-0789</issn>
<publisher>
<publisher-name><![CDATA[Universidad Católica Boliviana]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1683-07892023000200091</article-id>
<article-id pub-id-type="doi">10.35319/acta-nova.20232</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Monitoreo de Niveles de Agua en Embalses Utilizando Altimetría Satelital: Estudio de Caso en Cochabamba, Bolivia]]></article-title>
<article-title xml:lang="en"><![CDATA[Monitoring Water Levels in Reservoirs Using Satellite Altimetry:Case Study in Cochabamba, Bolivia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ledezma Perizza]]></surname>
<given-names><![CDATA[Fernando Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ledezma Perizza]]></surname>
<given-names><![CDATA[Mauricio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Mayor de San Simón Facultad de Ciencias y Tecnología Laboratorio de Hidráulica]]></institution>
<addr-line><![CDATA[Cochabamba ]]></addr-line>
<country>Bolivia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Católica Boliviana "San Pablo" Carrera de Ingeniería Civil ]]></institution>
<addr-line><![CDATA[Cochabamba ]]></addr-line>
<country>Bolivia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2023</year>
</pub-date>
<volume>11</volume>
<numero>2</numero>
<fpage>91</fpage>
<lpage>104</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S1683-07892023000200091&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S1683-07892023000200091&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S1683-07892023000200091&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Este artículo es el resultado de uno de los subproyectos del proyecto "Mejora de la conservación y gestión de la biodiversidad mediante el monitoreo de los impactos ecológicos y sociales de los megaproyectos hidroeléctricos en Bolivia", llevado a cabo en los años 2020 a 2023 por la Universidad Mayor de San Simón, la Universidad Católica Boliviana y la Universidad de Bonn en Alemania. En este estudio, se destaca la importancia de utilizar imágenes de la misión satelital Sentinel-1, que emplea tecnología de radar de apertura sintética (SAR) para la observación de la Tierra. Esta tecnología permite obtener información continua de los cuerpos de agua durante el día y la noche, así como bajo diversas condiciones ambientales, como la presencia de nubes. Para analizar y mejorar los resultados, se utiliza la diferencia de fase entre las señales de radar, proporcionando información topográfica y de deformación en diferentes modos de polarización (VV y HH). También se utilizan técnicas de correlación y visualización de datos, como mapas y gráficos en color, para facilitar la interpretación de los resultados. El monitoreo de los niveles de agua en embalses se realiza mediante la interferometría de radar (InSAR), una técnica utilizada por Sentinel-1 para medir los cambios en la superficie de la Tierra. Esta técnica combina imágenes SAR tomadas en diferentes momentos sobre la misma área para crear un interferograma, el cual proporciona mediciones precisas de los cambios en el nivel del lago. Al analizar las series temporales de estos datos, se pueden identificar tendencias a largo plazo y variaciones estacionales, lo que ayuda a comprender la dinámica espacial y temporal de los embalses. En este artículo se presentan dos casos de estudio de embalses: Corani y Misicuni en Cochabamba, Bolivia. Se dispone de información de monitoreo de niveles de embalses obtenida en el sitio, la cual se correlaciona con los resultados obtenidos mediante la interferometría por radar, mostrando buenos resultados en la comparación de estos datos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: This article is the result of one of the sub-projects of the project "Improving the conservation and management of biodiversity by monitoring the ecological and social impacts of hydroelectric megaprojects in Bolivia", carried out in the years 2020 to 2023 by the Universidad Mayor de San Simón, the Bolivian Catholic University, and the University of Bonn in Germany. In this study, the importance of using images from the Sentinel- 1 satellite mission, which employs Synthetic Aperture Radar (SAR) technology for Earth observation, is highlighted. This technology allows continuous information to be obtained from bodies of water during the day and night, as well as under various environmental conditions, such as the presence of clouds. To analyze and improve the results, the phase difference between the radar signals is used, providing topographic and deformation information in different polarization modes (VV and HH). Data correlation and visualization techniques, such as maps and color graphs, are also used to facilitate interpretation of the results. Monitoring of water levels in reservoirs is done using radar interferometry (InSAR), a technique used by Sentinel-1 to measure changes in the Earth's surface. This technique combines SAR images taken at different times over the same area to create an interferogram, which provides precise measurements of lake level changes. By analyzing the time series of these data, long- term trends and seasonal variations can be identified, helping to understand the spatial and temporal dynamics of reservoirs. In this article, two case studies of reservoirs are presented: Corani and Misicuni in Cochabamba, Bolivia. Reservoir level monitoring information obtained at the site is available, which is correlated with the results obtained by radar interferometry, showing good results in the comparison of these data.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Sentinel 1]]></kwd>
<kwd lng="es"><![CDATA[Monitoreo niveles de agua]]></kwd>
<kwd lng="es"><![CDATA[InSAR]]></kwd>
<kwd lng="es"><![CDATA[Corani]]></kwd>
<kwd lng="es"><![CDATA[Misicuni]]></kwd>
<kwd lng="es"><![CDATA[Cochabamba]]></kwd>
<kwd lng="en"><![CDATA[Sentinel 1]]></kwd>
<kwd lng="en"><![CDATA[Water Level Monitoring]]></kwd>
<kwd lng="en"><![CDATA[InSAR]]></kwd>
<kwd lng="en"><![CDATA[Corani]]></kwd>
<kwd lng="en"><![CDATA[Misicuni]]></kwd>
<kwd lng="en"><![CDATA[Cochabamba]]></kwd>
</kwd-group>
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