Dam effects on droughts magnitude and duration in a transboundary basin: The Lower River Tagus, Spain and Portugal

López‐Moreno, Juan I.; Vicente‐Serrano, Sergio M.; Beguerı́a, Santiago; Ruiz, José María García; Portela, María Manuela; Almeida, António Betâmio de

doi:10.1029/2008wr007198

Cited by 153 publications

(110 citation statements)

References 27 publications

(34 reference statements)

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“…The SPI computation procedure has been recently applied to runoff time series for a basin in California (Shukla and Wood, 2008) and to streamflow time series for the Tagus river in the Iberian Peninsula (López-Moreno et al, 2009). Related normalization procedures have also been applied for deriving agricultural droughts based on monthly quantiles of modelled soil moisture.…”

Section: Review Of Standardized Indicesmentioning

confidence: 99%

Multilevel and multiscale drought reanalysis over France with the Safran-Isba-Modcou hydrometeorological suite

Vidal

Martin

Franchistéguy³

et al. 2010

Hydrol. Earth Syst. Sci.

237

167

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Abstract.Physically-based droughts can be defined as a water deficit in at least one component of the land surface hydrological cycle. The reliance of different activity domains (water supply, irrigation, hydropower, etc.) on specific components of this cycle requires drought monitoring to be based on indices related to meteorological, agricultural, and hydrological droughts. This paper describes a high-resolution retrospective analysis of such droughts in France over the last fifty years, based on the Safran-Isba-Modcou (SIM) hydrometeorological suite. The high-resolution 1958-2008 Safran atmospheric reanalysis was used to force the Isba land surface scheme and the hydrogeological model Modcou. Meteorological droughts are characterized with the Standardized Precipitation Index (SPI) at time scales varying from 1 to 24 months. Similar standardizing methods were applied to soil moisture and streamflow for identifying multiscale agricultural droughts -through the Standardized Soil Wetness Index (SSWI) -and multiscale hydrological droughts, through the Standardized Flow Index (SFI). Based on a common threshold level for all indices, drought event statistics over the 50-yr period -number of events, duration, severity and magnitude -have been derived locally in order to highlight regional differences at multiple time scales and at multiple levels of the hydrological cycle (precipitation, soil moisture, streamflow). Results show a substantial variety of temporal drought patterns over the country that are highly dependent on both the variable and time scale considered. Independent spatio-temporal drought events have then been identified and described by combining local characteristics with the evolution of area under drought. Summary statistics Correspondence to: J.-P. Vidal (jean-philippe.vidal@cemagref.fr) have finally been used to compare past severe drought events, from multi-year precipitation deficits (1989)(1990)) to short hot and dry periods (2003). Results show that the ranking of drought events depends highly on both the time scale and the variable considered. This multilevel and multiscale drought climatology will serve as a basis for assessing the impacts of climate change on droughts in France.

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Section: Review Of Standardized Indicesmentioning

confidence: 99%

Multilevel and multiscale drought reanalysis over France with the Safran-Isba-Modcou hydrometeorological suite

Vidal

Martin

Franchistéguy³

et al. 2010

Hydrol. Earth Syst. Sci.

237

167

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show abstract

“…Additionally it guarantees the availability of water for irrigated agriculture and urban consumption the following summer given the large capacity for reservoir storage in the region (López-Moreno et al 2009, Lorenzo-Lacruz et al 2010. Nevertheless, very wet winters tend to comprise several extreme precipitation events, and these episodes can also cause havoc, namely through more frequent river floods, urban inundations and other natural hazards, such as landslides (e.g.…”

Section: Introductionmentioning

confidence: 99%

Extreme winter precipitation in the Iberian Peninsula in 2010: anomalies, driving mechanisms and future projections

Trigo²,

et al. 2011

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This work provides a first assessment of the outstanding characteristics of the anomalous precipitation occurrence in the winter of 2010 over the Iberian Peninsula, as well as on the associated atmospheric driving mechanisms. Large areas of Iberia, those located in the western and southern sectors, registered a new historical maximum in winter precipitation values. Simultaneously, the most extreme, negative North Atlantic Oscillation (NAO) index for winter was recorded in 2010. The anomalous pressure gradient in the North Atlantic region steered a large number of low pressure systems via an unusually southern path, directly influencing Iberia and northern Africa. Storms were frequent, and a high number of days occurred with weather types prone to cause precipitation. In addition, the most extreme daily precipitation episodes were recorded during the period with the strongest negative NAO index. Global climate models for the entire 21st century show that strong negative NAO winters, similar to that which occurred in 2010, may be expected in the future.

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“…Dams and sluices are important management means in the exploitation and utilization of water resources (Gross and Moglen, 2007;Lopez-Moreno et al, 2009). Today, there are more than 45 000 large dams (more than 15 m high) in the world, with more than half of these are in China alone (ICOLD, 1998).…”

Section: Introductionmentioning

confidence: 99%

Improvement of SWAT2000 modelling to assess the impact of dams and sluices on streamflow in the Huai River basin of China

Wang

Xia

2010

Hydrological Processes

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Abstract:Hydrological simulation and assessment in a dam-sluice regulated river basin are a complex and challenging issue. In this article, an improved SWAT2000 modelling system was developed that incorporated the Shuffled complex evolution (SCE-UA) optimization algorithm and the multi-site and multi-objective calibration strategy. The implication of multi-objective is different for different types of outlets, i.e. streamflow for an ordinary outlet, inflow for a sluice, and water storage for a reservoir. Model parameters were redefined to improve model simulations. The surface runoff lag time (SURLAG) was extended as a spatially distributed parameter, and a correction coefficient was introduced to modify the saturated hydraulic conductivity. The modelling system was then applied to the Huai River basin of China under various climatic conditions, including a very dry year (1999), a dry year (1981), an average year (1971), and wet year (1991). In all, 26 dams and 35 sluices were considered, among which about 20 dams/sluices were used for model calibration. The impact assessment primarily focused on the very dry year (1999). The results indicated that the released water from large reservoirs was blocked in the river channels by sluices located downstream. In the very dry year, the dam-sluice operations could result in an increase of the runoff volume during the non-flood season and a decrease in runoff during the flood season, but the changing magnitude during the non-flood season was much greater. An important conclusion of this case study is that the sluices in the Sha-Yin branch located in the north region and the dams in the southern mountainous region above the Wangjiaba Hydrological Station have played the most significant role in regulating the streamflow of the entire river basin. The methods addressed in this article can simulate hydrological regime in the river basins regulated by dams and sluices under different climatic conditions at the whole-watershed scale.

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Dam effects on droughts magnitude and duration in a transboundary basin: The Lower River Tagus, Spain and Portugal

Cited by 153 publications

References 27 publications

Multilevel and multiscale drought reanalysis over France with the Safran-Isba-Modcou hydrometeorological suite

Multilevel and multiscale drought reanalysis over France with the Safran-Isba-Modcou hydrometeorological suite

Extreme winter precipitation in the Iberian Peninsula in 2010: anomalies, driving mechanisms and future projections

Improvement of SWAT2000 modelling to assess the impact of dams and sluices on streamflow in the Huai River basin of China

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