Sedimentology of high-stage flood deposits of the Tagus River, Central Spain

Benito, Gerardo; Sánchez‐Moya, Y.; Sopeña, Alfonso

doi:10.1016/s0037-0738(02)00196-3

Cited by 110 publications

(72 citation statements)

References 10 publications

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“…Works that originally developed into aspects such as palaeoflood hydrology or climate change (Benito et al, 1996), continued with subjects like palaeoflood sedimentology (Benito et al, 2003a), magnitude and frequency (Benito et al, 2003b) or specifically about datings (Thorndycraft et al, 2003). Some preliminary works have been done in the Guadiana basin, like that of Ortega and Garzón (2003) and later by Ortega (2007), who studies recent and old floods through paleohydrologic techniques, historical floods and a gaged series of data.…”

Section: Introductionmentioning

confidence: 99%

A contribution to improved flood magnitude estimation in base of palaeoflood record and climatic implications – Guadiana River (Iberian Peninsula)

Ortega

Garzón

2009

Nat. Hazards Earth Syst. Sci.

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Abstract.The Guadiana River has a significant record of historical floods, but the systematic data record is only 59 years. From layers left by ancient floods we know about we can add new data to the record, and we can estimate maximum discharges of other floods only known by the moment of occurrence and by the damages caused. A hydraulic model has been performed in the area of Pulo de Lobo and calibrated by means of the rating curve of Pulo do Lobo Station. The palaeofloods have been dated by means of 14 C y 137 Cs. As non-systematic information has been used in order to calculate distribution functions, the quantiles have changed with respect to the same function when using systematic information. The results show a variation in the curves that can be blamed on the human transformations responsible for changing the hydrologic conditions as well as on the latest climate changes. High magnitude floods are related to cold periods, especially at transitional moments of change from cold to warm periods. This tendency has changed from the last medium-high magnitude flood, which took place in a systematic period. Both reasons seem to justify a change in the frequency curves indicating a recent decrease in the return period of big floods over 8000 m 3 s −1 . The palaeofloods indicate a bigger return period for the same water level discharge thus showing the river basin reference values in its natural condition previous to the transformation of the basin caused by anthropic action.

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Section: Introductionmentioning

confidence: 99%

A contribution to improved flood magnitude estimation in base of palaeoflood record and climatic implications – Guadiana River (Iberian Peninsula)

Ortega

Garzón

2009

Nat. Hazards Earth Syst. Sci.

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“…Más esetekben a kutatások célja a maximális árvízi kockázat becslése volt (Benito et al 2003, Benito és Thorndycraft 2005. Ehhez az extrém árvizek visszatérési idejét és vízhozamát korábbi áradások alapján rekonstruálták, azt használva ki, hogy nagy áradások alkalmával pangó vizek alakulhatnak ki, amelyek elősegítik a lebegtetett hordalék kiülepedését.…”

Section: Paleo-medrek Egykori Vízhozamának Meghatározási Lehetőségeiunclassified

A Maros hordalékkúp fejlődéstörténeti rekonstrukciója

Sümeghy

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“…2. Schematic diagram of a bedrock-confined setting with slackwater deposit physiographical settings [modified from Benito et al, 2003]. …”

Section: Figurementioning

confidence: 99%

Beyond the gorge: Palaeoflood reconstruction from slackwater deposits in a range of physiographic settings in subtropical Australia

et al. 2017

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The application of palaeoflood hydrology in Australia has been limited since its initial introduction more than 30 years ago. This study adopts a regional, field-based approach to sampling slackwater deposits in a subtropical setting in southeast Queensland beyond the traditional arid setting. We explore the potential and challenges of using sites outside the traditional physiographical setting of bedrock gorges. Over 30 flood units were identified across different physiographical settings using a range of criteria. Evidence of charcoal-rich layers and palaeosol development assisted in the identification and separation of distinct flood units. The OSL-dated flood units are relatively young with two-thirds of the samples being <1000 years old. The elevation of all flood units have resulted in estimated minimum discharges greater than the 1% annual exceedance probability. Although these are in the same order of gauged flood magnitudes, >80% of them classified as 'extreme event'. This study opens up the renewed possibility of applying palaeoflood hydrology to more populated parts of Australia where the need for improved estimation of flood frequency and magnitude is now urgent in light of several extreme flood events. Preliminary contributions to improve the understanding between high magnitude floods and regional climatic drivers are also discussed. Recognised regional extreme floods generally coincide with La Niña and negative IPO phases, while tropical cyclones appear to be a key weather system in generating such large floods.

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Sedimentology of high-stage flood deposits of the Tagus River, Central Spain

Cited by 110 publications

References 10 publications

A contribution to improved flood magnitude estimation in base of palaeoflood record and climatic implications – Guadiana River (Iberian Peninsula)

A contribution to improved flood magnitude estimation in base of palaeoflood record and climatic implications – Guadiana River (Iberian Peninsula)

A Maros hordalékkúp fejlődéstörténeti rekonstrukciója

Beyond the gorge: Palaeoflood reconstruction from slackwater deposits in a range of physiographic settings in subtropical Australia

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