Grupo de Investigaciones Hidrológicas para el Desarrollo de la Región Amazónica (G-IHDRA)

Permanent URI for this collectionhttps://repositorio.ucb.edu.bo/handle/20.500.12771/175

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    Impacts of Wildfires on Groundwater Recharge: A Comprehensive Analysis of Processes, Methodological Challenges, and Research Opportunities
    (2024) Guzmán Rojo, Mónica; Fernandez, Jeanne; D’Abzac, Paul; Huysmans, Marijke; Department of Water and Climate, Vrije Universiteit Brussel; Department of Earth Sciences, Uppsala University; Centro de Investigación en Ciencias Exactas e Ingenierías, Universidad Católica Boliviana San Pablo, Cochabamba, Bolivia; Centro de Investigación para el Desarrollo Sostenible del Oriente Boliviano, Universidad Católica Boliviana San Pablo. Santa Cruz de la Sierra, Bolivia
    ncreasing wildfire activity has led to complex ecosystem consequences, with direct effects on the subsystems that affect the presence and movement of water. Although studies have inves- tigated the cascading effects of wildfires on the water balance, our understanding of broad-scale groundwater modifications post fire remains unclear. This review aims to elucidate fire-induced shifts in the water balance, their causal factors, and their potential effects on groundwater recharge. By scrutinizing prior research examples that modeled post-fire recharge scenarios, the review highlights persistent knowledge gaps. The challenge of quantifying and integrating fire-induced alterations in precipitation, wind, and land temperature patterns into recharge projection models is specifically addressed. Despite these gaps, post-fire values of hydrologically meaningful parameters such as leaf area index (LAI), curve number (CN), and near-surface saturated hydraulic conductivity (KST) have been identified. Simulating post-fire recharge via the extrapolation of these values requires the consideration of site-specific conditions, vegetation recovery, and ash removal. It frequently results in a reduced interception and increased surface runoff, while evapotranspiration remains dependent on site-specific factors and often dictates groundwater recharge estimates. Although post-fire recharge simulations are inherently complex and imprecise, their growing application can guide land-use alterations and support policy implementation that considers fire-induced water availability changes
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    BASE DE DATOS HIDROGEOLÓGICOS ENFOCADA AL MODELAMIENTO DE AGUAS SUBTERRÁNEAS EN SAN JOSÉ DE CHIQUITOS. SANTA CRUZ, BOLIVIA
    (2019-10) Guzmán Rojo, Mónica Ximena; Añez Melgar, Fabiana
    La confiabilidad y validez de los estudios hidrogeológicos dependen en gran medida de la disponibilidad de un gran volumen de datos integrados en una estructura que permita construir los modelos, ejecutar simulaciones y que sea amigable con el usuario. Lo anterior, constituye la mejor herramienta para la toma de decisiones sobre manejo de aguas subterráneas. Con esta meta se construyó en la región de San José de Chiquitos, Santa Cruz, Bolivia, la primera base de datos hidrogeológica, en un sistema de información geográfica (SIG) que integra la información topográfica, meteorológica, hidrogeológica e hidrogeoquímica del municipio, y que cuenta con las condiciones para vincularse al software de modelación MODFLOW y realizar simulaciones numéricas de flujo subterráneo. A la fecha, la información del acuífero y del monitoreo que nutre la base de datos es limitada, sin embargo, su continua generación puede actualizarla y consecuentemente mejorar la simulación de diferentes escenarios de modelación que apoyen la toma de decisiones en el manejo de agua. Este proyecto constituye la primera fase de la tesis doctoral de “Manejo sustentable del acuífero de San José de Chiquitos, Santa Cruz, Bolivia”, que se desarrolla en el marco del proyecto “Contribución a la gestión integrada del agua en Bolivia”, realizado por la Universidad Católica Boliviana, en coordinación con la Universidad Libre de Bruselas, Bélgica. La meta de esta investigación es desarrollar un modelo numérico en MODFLOW introduciendo elementos conceptuales y subrutinas que hagan fácil su ejecución por parte del usuario a través de ArcGIS. The reliability and validity of hydrogeological studies depend mainly on the availability of a large volume of data integrated in a structure that allows the models to be built, simulations to run and be user friendly. The above is the best tool for decision making on groundwater management. With this goal, the first hydrogeological data base was built in the region of San José de Chiquitos, Santa Cruz, Bolivia, in a geographic information system (GIS) that integrates the topographic, meteorological, hydrogeological and hydrogeochemical information of the municipality, and that has the conditions to be linked to the modeling software MODFLOW and perform numerical simulations of groundwater. To date, the aquifer and monitoring information that feeds the database is limited, however, its continuous generation can update it and consequently improve the simulation of different modeling scenarios that support decision making in water management. This project constitutes the first phase of the doctoral thesis of "Sustainable management of the aquifer of San José de Chiquitos, Santa Cruz, Bolivia", which is developed within the framework of the "Contribution to integrated water management in Bolivia" project, carried out by the Bolivian Catholic University, in coordination with the Free University of Brussels, Belgium. The goal of this research is to develop a numerical model in MODFLOW by introducing conceptual elements and subroutines that make it easy for the user to execute through ArcGIS.
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    Combining hands-on and virtual experiments for enhancing fluid mechanics teaching: A design-based research study
    (2022) Gutierrez, Ronald R.; Escusa, Frank; Lyon, Joseph A.; Magana, Alejandra J.; Cabrera, Jose H.; Pehovaz, Richard; Link, Oscar; Rivillas-Ospina, German; Acuña, Guillermo J.; Kuroiwa, Julio M.; Guzmán, Mónica; Latosinski, Francisco G.
    Fluid Mechanics courses comprise both theoretical and laboratory modules. In developing nations, computer-assisted techniques are not commonly applied in Fluid Mechanics instruction. Forced by the COVID-19 pandemic, South American universities are, however, using them for online teaching. This contribution presents an 8-semester (2016–2019) educational intervention over an undergraduate Fluid Mechanics course. It mainly blends physical (hands-on) and virtual experiments (computer fluid dynamics-based simulations) for the laboratory module, which are complemented by flipped classroom-based prompts for the theoretical module. The intervention follows design-based research as a research method and is guided via conjecture mapping and fidelity of implementation standards. Our results suggest that the intervention improves fluid mechanics laboratory instruction, although improvements depend upon the participation of other educational actors such as teaching assistants and laboratory technicians to some extent. Laboratory report grades (the assessment instrument) follow the Gompertz probability distribution. Following UNESCO standards, a portion of the intervention output is shared as open educational resources. This contribution encourages upscaling the educational intervention through the formation of cooperative clusters to build common-pool Fluid Mechanics resources. Learning scientists have underlined the need to better understand laboratory instruction processes. They have been addressed in very few instances in developing countries. We believe that this study has the potential to provide valuable insights on the matter.
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    Estimating The Effect Of Wildfires On Groundwater Recharge Rates Through Soil Water Balance Models
    (2021) Guzmán, Mónica; D’Abzac, Paul; Huysmans, Marijke
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    Hydrogeological Evidence and its implications for integrated water management in Santa Cruz, Bolivia
    (2018) Guzmán Rojo, Mónica
    https://www.mgwa.org/conferences/mgwa-2018-fall-conference/