P2 - Contribución a la gestión integrada del agua

Permanent URI for this collectionhttps://repositorio.ucb.edu.bo/handle/20.500.12771/83

Browse

Author: search.filters.author.d'Abzac, Paul

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    GROUNDWATER RECHARGE AREAS MAPPING IN HIGH-ALTITUDE ANDEAN MOUNTAINS THROUGH MACHINE LEARNING ALGORITHMS
    (Universidad Católica Boliviana "'San Pablo". Programa VLIR - UOS., 2023-07-10) Aliaga Medrano, Evelyn; Soria Cespedes, Freddy; d'Abzac, Paul
    The high-altitude wetlands in the Central Andes are unique ecosystems located above 4000 masl in the Bolivian Altiplano. The analysis and classification of spatial information is a crucial step in the identification of wetlands in scarped topography. The objective of this study was to test machine learning algorithms to map Andean wetlands. The first step consisted on applying the machine learning algorithms Least Absolute Shrinkage and Selection Operator LASSO and Receiver Operating Characteristic ROC for the sensitivity analysis. Then, there were compared the Random Forest Regressor RFR, Support Vector Regressor SVR, and Multivariate Adaptative Regression Splines MARS regression supervised machine learning algorithms for the wetlands mapping. Results were validated by Google Earth satellite images and a regression coefficient. The RFR showed good results for areas with slopes of 0 - 32 degrees; the SVR showed good performance for areas with slopes of 44 - 76 degrees, while for areas with slopes of 0 - 12 degrees its performance was inaccurate. The application of the MARS showed trivial results compared to those obtained by the first two algorithms; some results were good for certain areas, areas with slopes of 0 - 12 degrees and 44 - 77 degrees were erroneously flagged.
  • No Thumbnail Available
    Item
    MANAGEMENT OF ENVIRONMENTAL ACTION PROJECTS WITH VULNERABLE COMMUNITIES IN BOLIVIA: UNDERSTANDING, LEARNING, PROPOSING
    (Universidad Católica Boliviana "'San Pablo". Programa VLIR - UOS., 2023-07-10) d'Abzac, Paul
    Bolivia's chaotic development has led to alarming environmental pollution over the last 50 years, and is exposing rural communities to an increasing socioeconomic and environmental vulnerability. This situation has provoked, in recent years, a phenomenon of migration due to land use change. During this time, many academic and international cooperation environmental projects have been implemented to help these vulnerable populations, but they have had a limited impact due to the complexity of the situation. The Integrated Water Management component of the CReA Project, funded by VLIR, seeks to find solutions to increase the resilience of communities to water-related problems with an integrated and sustainable vision. The transdisciplinary projects developed are carried out with and for the communities, with the support of other national and international actors. The project "Agua y Vida en La Maica" works in a vulnerable agricultural area of the municipality of Cochabamba and established, with the community, a work based on 3 fundamental axes: "Understanding" through research, "Learning" through knowledge exchanges and "Proposing" with the development of tools adapted to the reality of the community.
  • No Thumbnail Available
    Item
    COMPARISON OF MICROPLASTICS LEVELS IN THE AIR OF AGRICULTURAL AND URBAN AREAS OF THE CITY OF COCHABAMBA, BOLIVIA
    (Universidad Católica Boliviana "'San Pablo". Programa VLIR - UOS., 2023-07-10) Oporto Tapia, Valeria; Escobar Camacho, Ivan Federico Xavier; Luján Pérez, Marcos Luis; d'Abzac, Paul
    Microplastics are considered emerging pollutants and, in recent years have been found in all environmental compartments, even in living organisms. Their relationship with health problems was highlighted. Cochabamba is one of the cities most affected by air pollution in Latin America and there are marked differences in air quality levels between the south and north zones. La Maica, in the southern zone, is the last agricultural area of the city of Cochabamba and the northern zone is a urban area. Thus, the southern zone is characterized by higher levels of particulate matter (PM10) than the northern zone. The study seeks to compare the levels of microplastics in the air between these two zones of the city. Microplastics were characterized using commonly used density separation and optical identification techniques. The results highlighted the presence of microplastics in the air of the two zones and showed that the levels of microplastics and PM10 particles are inversely proportional under the monitoring conditions of the study. This result can be related to the environmental and socioeconomic conditions of each zone