Hydrology of the Rhône at Porte du Scex

This lecture covers the hydrological characteristics of the Rhône River at Porte du Scex, focusing on flow rates, discharge changes, and duration curves from 1905 to 2003. It discusses the impact of hydraulic developments on natural regimes, fish populations, and ecological habitats. Various hypotheses for the decline in fish catches are explored, including changes in diet, habitat quality, and pollution. The lecture also delves into fish behavior, habitat preferences, and the influence of locks on watercourses. Technical solutions to mitigate the effects of hydraulic structures are presented, along with the importance of maintaining adequate flow rates and water quality for aquatic ecosystems.