Linking Drought Indicators to Policy Actions in the Tagus Basin Drought Management Plan |
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Authors: | Luis Garrote Francisco Martin-Carrasco Francisco Flores-Montoya Ana Iglesias |
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Affiliation: | (1) Department of Civil Engineering: Hydraulics and Energetics, Universidad Politécnica de Madrid, ETSI Caminos. c/ Prof. Aranguren s/n 28040, Madrid, Spain;(2) Public Works Council, Ministerio de Fomento, c/ Fruela, 8 28011, Madrid, Spain;(3) Department of Agricultural Economics and Social Sciences, Universidad Politécnica de Madrid, Av. Complutense s/n, 28040, Madrid, Spain |
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Abstract: | One crucial aspect of drought management plans is to establish a link between basin drought state and management actions.
Basin state is described by a drought indicator system that includes variables like precipitation, streamflow, reservoir inflow,
reservoir storage and groundwater piezometric levels. Basin policy consists on a catalogue of management actions, ranging
from enforcing demand reduction strategies to establishing priority of users to allocate scarce water or approving emergency
works. In this paper, the methodology applied in the Tagus Basin Drought Management Plan to link operational drought indicators
to policy actions in regulated water supply systems is presented. The methodology is based on the evaluation of the probability
of not being able to satisfy system demands for a given time horizon. A simplified model of every water resources system in
the basin was built to evaluate the threshold of reservoir volume that is required to overcome the drought situation without
deficit. For each reservoir level, a set of policy actions is proposed with the goal of guaranteeing essential demands during
drought conditions. The methodology was validated with a simulation of system behavior for 60 years of historic streamflow
series, finding acceptable results in most systems. |
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Keywords: | drought management drought indicators water resources water resources systems Tagus river |
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