Hydrologic (dis)connectivity of the fluvial systems Senguerr and Chubut due to natural and cultural factors in the 20th century
The Senguerr and Chubut River systems constitute the most important water resource in the extra-Andean region of the Chubut Province. Both systems were connected at the beginning of the Holocene. However, the more arid climatic conditions prevailing in the area from the Middle Holocene onwards led t...
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| Autores principales: | , , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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CURIHAM: Centro Universitario Rosario de Investigaciones Hidroambientales Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario Director: Dr. Ing. Hernán Stenta Riobamba 245 bis, 2000 Rosario (Santa Fe), Argentina. Telefa
2025
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| Acceso en línea: | https://cuadernosdelcuriham.unr.edu.ar/index.php/CURIHAM/article/view/276 |
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| Sumario: | The Senguerr and Chubut River systems constitute the most important water resource in the extra-Andean region of the Chubut Province. Both systems were connected at the beginning of the Holocene. However, the more arid climatic conditions prevailing in the area from the Middle Holocene onwards led to their disconnection. The (dis)connection of the systems was studied through an integrated approach using, hydraulic modelling, hydrological balance and fluvial geomorphology analysis. The former connection was characterized in terms of the paleo-discharges of the Chico River (module of 15.6 m3/s, mean maximum monthly flow of 36.3 m3/s and a dominant flow of 70 m3/s) and its frequency. Due to the high evaporation rate, high areal extension of the Colhué Huapi and Musters Lakes, and the obstruction of the beginning of the Chico River, the current frequency of connectivity is very low and depends on the occurrence of several consecutive wet years. On the other hand, the connectivity of the systems Chico-Chubut was characterized, estimating floods of 80 m3/s and an average annual contribution of 20.1 Hm3 to the Chubut system. The results of the present study suggest that the current disconnection in the Senguerr-Chubut River systems began before the cultural changes in the use of the water resources during the 20th century. |
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