Dinámica de aportación de material leñoso en cauces de microcuencas prioritarias de la Hoya de Loja.

The study of woody material in rivers is an important component of the fluvial system that has implications for hydraulics, morphology, ecology and risk management associated with flooding. Since our region has high mountain areas that are susceptible to flood damage and hauling materials during the winter season, it is necessary to improve knowledge of their recruitment and mobility dynamics. The present work focused on the determination of the volume of woody material of the Shucos, Volcán and El Carmen basins of Hoya de Loja, Ecuador. These were selected for their state of conservation identifying that the El Carmen is in a good state of conservation, Volcán is in medium conservation and Shucos is in poor conservation. The sampling areas comprised a 500 m segment of the main channel. In each segment, all pieces of wood greater than 5 cm in diameter and 1 m long were labeled and referenced. The diameter, length and the characteristics of origin, position, type and association status were measured in each piece. In each studied segment the width and depth of the channel was also measured. The measurements were made every fifteen days for three months. Volumes of woody material were low compared to most other reported results in other regions. The channel with greater volume large woody debris was Volcán with 0.52 m3, Shucos got 0.43 m3 and El Carmen 0.24 m3. The sections with the highest concentration of woody material corresponded to the sections in which the dimensions of the pieces exceeded the size of the channel. The low number of pieces did not allow finding statistically significant relationships between the characteristics of the channel and the variables of the woody material. Regarding mobility, the percentages were 32 % in Shucos, 21 % in Volcán and 23 % in the El Carmen. The main cause of mobility of the pieces was increases in flow during the winter season. The results of the present study contribute to a better understanding of the processes of mobilization and contribution of woody material in high mountain rivers. Keywords: Large wood, Wood transport, flow, channel morphology, mountain streams

• Үндсэн зохиолч: Soto Jimenez, Daniel Fernando (author)
• Формат: bachelorThesis
• Хэл сонгох: spa
• Хэвлэсэн: 2019
• Нөхцлүүд: RIO; MADERA; MORFOLOGIA
• Онлайн хандалт: http://dspace.unl.edu.ec/jspui/handle/123456789/22034