An Integrated Modelling Approach to Study Future Water Demand Vulnerability in the Montargil Reservoir Basin, Portugal

This paper describes an integrated modelling approach to study water use vulnerability in a typical Mediterranean basin under different climate change projections. The soil water assessment tool (SWAT) and the MOHID (from modelo hidrodinâmico) Water model were used to evaluate the impacts of two cli...

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Bibliographic Details
Published in:Sustainability 2019-01, Vol.11 (1), p.206
Main Authors: Almeida, Carina, Ramos, Tiago B., Sobrinho, João, Neves, Ramiro, Proença de Oliveira, Rodrigo
Format: Article
Language:English
Subjects:
Basins
Boundary conditions
Climate change
Demand
Fluid dynamics
Irrigation
Land use
Mathematical models
Modelling
Moisture content
Physical simulation
Precipitation
Rain
Reliability
Reservoir performance
Reservoirs
Rivers
Seasons
Soil water
Water availability
Water demand
Water quality
Water resources
Water shortages
Water use
Watersheds
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Summary:This paper describes an integrated modelling approach to study water use vulnerability in a typical Mediterranean basin under different climate change projections. The soil water assessment tool (SWAT) and the MOHID (from modelo hidrodinâmico) Water model were used to evaluate the impacts of two climate scenarios (GFDL-ESM2M and IPSL-CM5A-LR) on water availability in Montargil’s basin and reservoir (Portugal) during two decadal timelines (2030 and 2060). Reservoir performance metrics were estimated considering also two water demand scenarios: an average of the water demand in the last 10 years; and the largest annual demand of the last 10 years. The SWAT model results showed a future decrease of inflows to the reservoir, with its volumetric reliability decreasing from 100% in the historical simulation to about 60–70% in the IPSL-CM5A-LR climate scenario and 40–50% in the GFDL-ESM2M climate scenario. The time reliability also decreased to less than 30%, while the resiliency for the water demand decreased to an average 20–35% for both climate scenarios. These impacts indicate the importance of the managing systems in an integrative mode to prevent water resources reduction in the region.
ISSN:2071-1050
2071-1050
DOI:10.3390/su11010206