EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021

(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)

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5/26/2021 | 8:30 AM - 10:30 AM | SPATIAL AND TEMPORAL FLOW INTERMITTENCY PATTERNS IN A MEDITERRANEAN BASIN: PRESENT AND FUTURE | Virtual Platform

SPATIAL AND TEMPORAL FLOW INTERMITTENCY PATTERNS IN A MEDITERRANEAN BASIN: PRESENT AND FUTURE

Non-perennial rivers and streams are ubiquitous globally, especially in semi-arid and arid landscapes. Nonetheless, despite their prevalence worldwide, non-perennial systems have been under-represented in the hydrology research, and our understanding of their hydrology is minimal compared to perennial systems. Predicting the availability of freshwater resources is essential, especially in the Mediterranean area, where most of the agricultural systems depend on precipitation and irrigation. The modelling of these dynamic systems remains a challenge. Most of the existing models focus on continuously flowing rivers, without addressing some relevant characteristics of these systems as the spatio-temporal intermittency patterns. In our study, we implemented a watershed-scale hydrological model on a Mediterranean intermittent basin, using the Soil and Water Assessment Tool program. The model was calibrated using data from 2 gauging stations located at the mainstem, and 14 stage recorders dispersed across the river network. Simulation results and observed flow intermittency patterns were analyzed. Furthermore, we also simulated climate change scenarios and compared the flow intermittency patterns with the current ones. Results indicate longer duration of the non-flow period, with most of the stream network turning ephemeral and with few and isolated stretches remaining permanent.

Flow regime
Climate change
Connectivity

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Presenters/Authors

Oriana Llanos (), Catalan Institute for Water Research (ICRA), ollanos@icra.cat;