Análisis del comportamiento hidrológico de crecidas y sequías de la quebrada Batagá, Pamplonita-Norte de Santander.

Abstract

This research studied the hydrological behavior of floods and droughts in the Batagá stream in the municipality of Pamplonita, Norte de Santander. For the development and fulfillment of the objectives, 5 stages were used. Initially, a diagnosis of the area was made by means of a field visit whose purpose was to know the current anthropic and natural factors that affect the behavior of the micro-watershed; within these factors, hydrological, use and vegetation cover, lithological, and social aspects were taken into account. Subsequently, the processing and analysis of the meteorological variables of mean temperature and precipitation downloaded from the NASA Geovanni platform for the period from 1998 to 2021 was carried out. Following the use of GIS tools, the free QGIS software was used for the physicomorphometric characterization of the basin and the preparation of maps. Likewise, based on the data obtained in the previous stages and the use of formulas, the maximum flood flows and minimum drought flows were determined and used for the preparation of IDF curves and duration. On the other hand, the use and vegetation cover were identified using the Corine Land Cover methodology; additionally, the lithological composition was elaborated according to the IGAC platform. Finally, SPI and PET were determined, according to the classification of bioclimatic indexes. It was concluded that the micro-watershed is highly susceptible to the production of flows with moderate floods during high rainfall, as well as the presence of erosion and sediment transport processes.