Análisis de la dinámica de aportación de material leñoso en cauces de microcuencas El Carmen, Mónica y Las Violetas de la Hoya de Loja

The research was done in the microbasins EL Carmen, Mónica and Las Violetas. They are located in the canton and province of Loja. The monitoring period was from March to May 2018. It was determined the volume of large woody debris (LDW). In adittion, the relationship of the flow with the characteristics of LDW and the influence of LDW on the morphology of the channels A 500 m along section of the main channel in the middle and low altitude zones of the microbasins was selected and divided into 20 sections. In each study zone, the width and depth of the channels were measured; furthermore, the log pieces > 5 cm in diameter and > 1 m in length with their respective characterization and volume. The gauging of the channels were done with chemical tracers in order to obtain precipitation data. Information was downloaded from the meteorological stations of the EC, MO and La Argelia. A statistical analysis was applied to evaluate the influence of LWD on the morphology of the channels in each microbasin during the research. The results indicated LWD volumes of 0.79 m3 for MO, 0.21 m3 for EC and 0.17 m3 for VO. The conservation status varies from old to medium condition, with a dominant presence of broadleaf species. With respect to flow levels, it was obtained mean values of 37 l/s 377 l/s, and 410 l/s e n VO, Mo and EC respectively. Precipitations were reported from February to May ranging from 250 mm to 573 mm. The statistical analysis concluded that there is not association between LWD and the morphology of the channels in each microbasin. This study allowed to verify the variability of LWD volume present in the channels of the microbasins. Elements like flow level and precipitation do not directly affect the mobility and transport of log pieces. In the lower parts there are not observed morphological changes in the channels, due to variability of the different levels of conservation and vegetal cover such as the type, erosion and use of soil; addionally, the degree of intensity of agricultural and anthropogenic activities, the same ones that influenced in the results that are exposed in the present study. Keywords: woody material, river morphology, supply dynamics, mountain channels, water flow

• Hovedforfatter: Salazar Torres, Juan Carlos (author)
• Format: bachelorThesis
• Sprog: spa
• Udgivet: 2019
• Fag: RIO; DINÁMICA DEL SUELO; MORFOLOGIA
• Online adgang: http://dspace.unl.edu.ec/jspui/handle/123456789/22122