19/05/2017

Defensa Tesis: Analysis of hydro-sedimentary processes and impacts affecting river basins and channels. PhD Gemma Piqué

(11h) LLeida Sala de Graus (Edifici 1, Planta baixa) - Escola Tècnica Superior d'Enginyeria Agrària

 Defensa Tesis Doctoral

“Analysis of hydro-sedimentary processes and impacts affecting river basins and channels"

PhD Gemma Piqué- Universitat de Lleida

Abstrac: This PhD thesis studies hydro-sedimentary dynamics in Mediterranean rivers, both in ‘natural’ and in dammed rivers. For this purpose, a multi-temporal and spatial research was carried out, including field measurements in representative river reaches, data analysis at basin scale, and experiments in artificial streams. The hydrological alteration downstream from dams was documented at different temporal scales, and results showed a notable change in the magnitude and frequency of floods. Regarding sediments, a severe deficit was observed below dams, a fact that facilitates the establishment of biofilm which, in turn, favours river bed stabilisation. Moreover, the study shows how high sediment generation influences the in-channel storage and the river sediment budget, thus regulating the sediment input in reservoirs. The thesis examines the effects of a suit of human activities on fluvial processes and how these alter rivers’ bio-physical interactions, and emphasise the need of continuous monitoring of all these processes to achieve a sound management of fluvial ecosystems

 

19 de maig - 11.00h
Lloc: Sala de Graus (Edifici 1, Planta baixa) - Escola Tècnica Superior d'Enginyeria Agrària - Universitat de Lleida