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Alvaro Sordo-Ward  - - - 
Top co-authors See all
Luis Garrote

99 shared publications

Department of Civil Engineering: Hydraulics, Energy and Environment, Technical University of Madrid, Madrid, Spain

Ana Iglesias

57 shared publications

Universidad Politécnica de Madrid; Madrid Spain

Luis Mediero

29 shared publications

Department of Civil Engineering: Hydraulic, Energy and Environment, Technical University of Madrid, Madrid, Spain

Alfredo Granados

11 shared publications

Universidad Politécnica de Madrid; Madrid Spain

P. Bianucci

4 shared publications

AQUATEC (Suez Group); Dep. Basin Management; Madrid Spain

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Publication Record
Distribution of Articles published per year 
(2012 - 2018)
Total number of journals
published in
 
8
 
Publications See all
PROCEEDINGS-ARTICLE 7 Reads 0 Citations Stochastic assessment of the influence of reservoir operation in hydrological dam safety through risk indexes Ivan Gabriel-Martin, Alvaro Sordo-Ward, Luis Garrote, Isabel... Published: 15 November 2018
Proceedings of 3rd International Electronic Conference on Water Sciences (ECWS-3), doi: 10.3390/ecws-3-05811
DOI See at publisher website ABS Show/hide abstract
Hydrological dam safety assessment methods traditionally assume that the reservoir is full while it receives the design flood. In practice, reservoir management strategy determines the probability distribution of reservoir levels at the beginning of flood episodes. In this study we present a method to economically assess the influence of reservoir management strategy on hydrological dam safety and downstream flood risk. The method was applied to a gated-spillway dam located in the Tagus river basin. A set of 100000 inflow hydrographs was generated through a Monte Carlo procedure, reproducing the observed statistics of main hydrograph characteristics: peak flow, volume and duration. The set of 100000 hydrographs was routed through the reservoir applying the Volumetric Operation Method as flood control strategy. Three different scenarios were studied: initial reservoir level equal to maximum normal level, equal to a maximum conservation level and following the probability distribution of initial reservoir levels. In order to evaluate economically the influence of initial variable reservoir level and compare the three scenarios, a global risk index was applied. The index combines the hydrological risk for the dam, linked to the maximum water level experienced in the reservoir while the flood is routed, and the flood risk in the downstream river reach, linked to the discharge releases from the dam. The results highlighted the importance of considering the fluctuation of initial reservoir level for assessing the risk related to hydrological dam safety. Within the case study, the global risk index reduced its value up to 93 % if variable initial reservoir level is accounted, from 1445.6 x103 to 83 x103 euros.
PROCEEDINGS-ARTICLE 5 Reads 0 Citations Effects of key properties of rainfall series on hydrologic design of sustainable urban drainage systems (SuDS) Rodrigo Jodra-López, Alvaro Sordo-Ward, Iván Gabriel-Martin,... Published: 15 November 2018
Proceedings of 3rd International Electronic Conference on Water Sciences (ECWS-3), doi: 10.3390/ecws-3-05827
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The aims of this study are to quantify the effects of key properties of rainfall time series (frequency, duration, depth, rate and peak, time between events, length of series and precipitation thresholds, among others) on the hydrologic design of sustainable urban drainage systems (SuDS), to test a method for their estimation from daily time series and to quantify their uncertainty. Several typologies of SuDS infrastructures are designed to achieve a target treatment capacity. This target capacity is usually defined according to two methods: treating a percentage of the total volume of rainfall (50, 80, 90, 95, 99%) or treating a percentage of the total number of rainfall events (50, 80, 90, 95, 99%). We considered the city of Madrid as the case study, compiling 58 years of observed data (10-minute time step) and aggregating to daily time series. We obtained the design parameters from the full resolution dataset and then tested a simplified method to estimate them from daily time series of varying length. First, we calculated the design parameters for different storm thresholds (0, 1 and 2 millimeters). Second, we determined the design parameters from the aggregated daily time series by applying a temporal stochastic rainfall generator model (RainSimV3). We estimated the model parameters from daily data and generated 100 series of 58 years at 10-minute time step, and compared the results. Third, we generated 100 series of different lengths (20, 30, 40, 50, 58, 80 and 100 years). Fourth, we generated 100 series of 58 years at 10-minute time step (for each series length). Finally, we analyzed the uncertainty produced by the length of the observed data set. Results showed that, depending on the criteria adopted for the estimation of rainfall design parameters, SuDS structure volumes could vary up to 30 %. Further research includes the analysis of different climate locations.
PROCEEDINGS-ARTICLE 3 Reads 0 Citations Effort and performance of the management of water for agriculture under climate change in Southern Europe Luis Garrote, Alvaro Sordo-Ward, Alfredo Granados, Ana Igles... Published: 15 November 2018
Proceedings of 3rd International Electronic Conference on Water Sciences (ECWS-3), doi: 10.3390/ecws-3-05812
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We evaluate alternatives for the management of water for agriculture under climate change in six representative basins of Southern Europe: Duero-Douro, Ebro, Guadalquivir, Po, Maritsa-Evros and Struma. Management objective is maximizing water availability, understood as the maximum demand that can be satisfied with a given reliability. We focus on water availability for agriculture. For simplification we are assuming only two types of demands: urban and irrigation. Water is first allocated to urban demands following the established priority and the remaining resources are allocated to agriculture. If water availability is not enough to satisfy all irrigation demands, management measures are applied with the goal of achieving a balance between resources and demands. We present an analysis of three possible management measures to face water scarcity in the long term scenario: increasing reservoir storage, improving efficiency of urban water use and modifying water allocation to environmental flows. These management measures are globally evaluated for the selected basins in three representative climate scenarios, comparing their possible range and effectiveness. While in some basins, like Ebro or Struma, measures can significantly increase water availability and compensate for a fraction of water scarcity due to climate change, in other basins, like Guadalquivir, water availability cannot be enhanced with management measures and irrigation water use will have to be reduced.
Article 0 Reads 0 Citations Influencia del nivel inicial en la definición de resguardos estacionales en presas Ivan Gabriel-Martin, Alvaro Sordo-Ward, Luis Garrote Published: 30 October 2018
Ingeniería del agua, doi: 10.4995/ia.2018.9526
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El estudio presenta una metodología de carácter estocástico para la definición de Normas de Explotación optimizando tanto la explotación ordinaria como la seguridad hidrológica de la presa. Además, la metodología permite tener en cuenta la variabilidad del nivel inicial en el embalse en el momento de avenida. El caso de estudio es una presa bóveda clasificada como tipo A en función del riesgo potencial cuyo principal uso es el regadío. En el caso de estudio, se ha determinado un conjunto de resguardos que, cumpliendo la normativa relativa a niveles máximos en el embalse, maximizan la demanda máxima atendible para una garantía volumétrica del 90%. Se ha observado que al tener en cuenta la variabilidad del nivel inicial en el momento de avenida, la presa del caso de estudio no necesita resguardos para cumplir la normativa, mientras que si se supone embalse lleno el volumen de resguardo es de 70 hm3 en una de las estaciones. La metodología presentada puede ser de utilidad para el análisis y priorización de inversiones en seguridad hidrológica de presas existentes.
BOOK-CHAPTER 0 Reads 0 Citations Drought Vulnerability Under Climate Change: A Case Study in La Plata Basin Alvaro Sordo-Ward, María D. Bejarano, Luis Garrote, Victor A... Published: 24 August 2018
Drought, doi: 10.1002/9781119017073.ch7
DOI See at publisher website
Article 5 Reads 2 Citations Analysis of Current and Future SPEI Droughts in the La Plata Basin Based on Results from the Regional Eta Climate Model Alvaro Sordo-Ward, María Dolores Bejarano, Ana Iglesias, Víc... Published: 04 November 2017
Water, doi: 10.3390/w9110857
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We identified and analysed droughts in the La Plata Basin (divided into seven sub-basins) for the current period (1961–2005) and estimated their expected evolution under future climate projections for the periods 2011–2040, 2041–2070, and 2071–2099. Future climate projections were analysed from results of the Eta Regional Climate Model (grid resolution of approximately 10 km) forced by the global climate model HadGEM2-ES over the La Plata basin, and considering a RCP4.5 emission scenario. Within each sub-basin, we particularly focused our drought analyses on croplands and grasslands, due to their economic relevance. The three-month Standardized Precipitation Evapotranspiration Index (SPEI3) was used for drought identification and characterization. Droughts were evaluated in terms of time (percentage of time from the total length of each climate scenario), space (percentage of total area), and severity (SPEI3 values) of cells characterized by cropland and grassland for each sub-basin and climate scenario. Drought-severity–area–frequency curves were developed to quantitatively relate the frequency distribution of drought occurrence to drought severity and area. For the period 2011–2040, droughts dominate the northern sub-basins, whereas alternating wet and short dry periods dominate the southern sub-basins. Wet climate spread from south to north within the La Plata Basin as more distant future scenarios were analysed, due to both a greater number of wet periods and fewer droughts. The area of each sub-basin affected by drought in all climate scenarios was highly varied temporally and spatially. The likelihood of the occurrence of droughts differed significantly between the studied cover types in the Lower Paraguay sub-basin, being higher for cropland than for grassland. Mainly in the Upper Paraguay and in the Upper Paraná basins the climate projections for all scenarios showed an increase of moderate and severe droughts over large regions dedicated to crops and grasses. On the other hand, for the near future, the Lower Uruguay and the River Plata basins showed a decrease of drought severity compared to the current period. Projections suggest an increase in competition among uses in these regions and the need for a potential relocation of certain crops from the northern regions towards cooler regions located in the centre and south. Further research should consider other climate projections and perform high spatial resolution studies in localized areas.
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