The aggressiveness of rain contributes to the erosion of the soil in high mountain regions, and therefore to the sedimentation in the lower part of the watershed. To know about the aggressiveness of rain in coastal and Andean regions contributes to the formulation of mitigation measures that help to the reduction of erosion and loss of nutrients. Fournier indices, Modified Fournier and precipitation concentration provide the ability to estimate the spatial and temporal distribution of the aggressiveness of the rain. This study presents a spatial and temporal analysis of climatic aggressiveness in the Guayas river watershed located on the coast and the equatorial Andes. Registered monthly data of 30 rainfall stations for the period 1968-2014 was selected. Homogeneous precipitation zones were determined by the k-means method. The results indicated two predominant homogenous regions, the fi...

Se identificaron regiones homogéneas de precipitación en el Ecuador y su relación con el fenómeno de El Niño, utilizando registros de 215 estaciones pluviométricas a escala mensual para el periodo 1968-2014. Los datos se sometieron a un análisis de K-means y, posteriormente, fueron validados con el método del vector regional (MVR). Los resultados permitieron identificar 22 regiones: siete regiones relacionadas con procesos climáticos regionales en la costa del Pacífico (precipitación unimodal); dos regiones con precipitaciones orográficas significativas en las estribaciones occidentales de los Andes; ocho regiones ubicadas en zona interandina, caracterizadas por una reducción de la precipitación de norte a sur, de variabilidad local y régimen de precipitación bimodal. En la zona amazónica, se identificaron cinco regiones: tres ubicadas en los flancos externos de la cordi...

This article identifies homogeneous precipitation regions in Ecuador and their relationship to the El Niño-Southern Oscillation (ENSO), using monthly records from 215 rain stations for the 1968–2014 period. A k-means clustering analysis was used to divide the study area into k regions based on monthly and annual precipitation variables and geographic location (latitude, longitude, and altitude). The robustness of each cluster was evaluated using the “silhouette” coefficient. The groupings were then validated using the regional vector method (RVM). Twenty-two regions of homogeneous precipitation were identified. Seven regions are related to regional climate processes on the Pacific coast (unimodal precipitation). Two regions in the western foothills of the Andes show significant orographic rainfall. Eight regions in the inter-Andean region present a bimodal precipitation regime cha...

Universidad Nacional Agraria La Molina. Escuela de Posgrado. Doctorado en Recursos Hídricos