The large-scale distribution and internal geometry of the fall 2000 Po River flood deposit: Evidence from digital X-radiography

Wheatcroft, Robert A.; Stevens, Andrew W.; Hunt, Louise; Milligan, Timothy G.

doi:10.1016/j.csr.2006.01.002

Cited by 72 publications

(50 citation statements)

References 41 publications

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“…Concerning the similarities, the flood emplacement in May 2009 occurred during fair marine weather conditions (wave height <1 m) and relative small tide oscillations (∼50 cm) (Fig. 3b, c) suggesting deposition in shallow regions of the prodelta as observed for October 2000 flood (Wheatcroft et al, 2006).…”

Section: The May 2009 Flood Eventmentioning

confidence: 99%

“…The stations were re-occupied eight times over the next 2 yr by an international team of American and European scientists as part of the EuroSTRATAFORM project, in order to capture the temporal evolution of the initial flood deposit. Results from this international effort were published in several manuscripts (Fox et al, 2004;Boldrin et al, 2005;Palinkas et al, 2005;Syvitski et al, 2005a;Wheatcroft et al, 2006;Milligan et al, 2007;Miserocchi et al, 2007) and they will be used in this study to better constrain our results. In order to be consistent with previously published studies, we sampled the same station locations occupied during the EuroSTRATAFORM project.…”

Section: Po River and Deltamentioning

confidence: 99%

“…The October 2000 flood was particularly significant as the river flow exceeded 9650 m 3 s −1 (Fig. 2a) (Boldrin et al, 2005;Palinkas et al, 2005;Wheatcroft et al, 2006). A rapid-response cruise was organized to collect sediment cores along and across the Po prodelta in December 2000 to understand the initial deposition of the flood deposit.…”

Section: Po River and Deltamentioning

confidence: 99%

“…In this system, the supply and accumulation of OC are highly episodic because of flood events that ensure a rapid supply and deposition of land-derived OC in the coastal ocean (Palinkas et al, 2005;Wheatcroft et al, 2006;Miserocchi et al, 2007;Tesi et al, 2008). Recently, event-dominated rivers like the Po have received renewed consideration as they account for ∼50% of the sediment supply to the ocean (Milliman and Syvitski, 1992).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of distributary channels on sediment and organic matter supply in event-dominated coastal margins: the Po prodelta as a study case

Tesi

Miserocchi²,

Goñi

et al. 2011

Biogeosciences

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Section: The May 2009 Flood Eventmentioning

confidence: 99%

Section: Po River and Deltamentioning

confidence: 99%

Section: Po River and Deltamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of distributary channels on sediment and organic matter supply in event-dominated coastal margins: the Po prodelta as a study case

Tesi

Miserocchi²,

Goñi

et al. 2011

Biogeosciences

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“…Heavy rainfalls interested the north-western Italian Alps from the upstream reach of the Po river to the Ticino river, causing huge flooding and landslides with significant damages to houses and infrastructures and several life losses. The event effects and the subsequent land planning measures adopted for the risk mitigation were studied by Ratto et al [11] and Wheatcroft et al [14].…”

mentioning

confidence: 99%

The October 2000 flood at the Po river and Sesia river junction

Fugazza¹,

Magri²,

Natale³

et al. 2008

WIT Transactions on Ecology and the Environment

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During the October 2000 flood more than 80 km 2 of rural and settled areas located in the floodplain close to the junction of the Sesia and Po rivers were inundated. The flooding was studied combining three different mathematical models: a 1D model, a 2D model and a lumped, conceptual model.The propagation of the flood wave along a reach of 76 km of the Po river was carried out by applying the 1D model and considering the outflow through the breaches in the overtopped levees. The outflow inundated the Casale Monferrato floodplain and exited into the Po river where it joins with Sesia river. The inundation of the floodplain was simulated by means of both the 2D mathematical model and the conceptual model. The 2D computational grid was deduced from the LiDAR digital elevation model of the river junction integrated by bathymetric surveys. The 2D model proved to be more accurate in simulating the dynamics of the flooding when compared to the 1D model. This more traditional approach does not seem acceptable since discrepancies in the water surface elevations computed by means of 2D and 1D models are as large as the levees freeboard usually adopted in real world design of the Po river levees.

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In situ observations of wave‐supported fluid‐mud generation and deposition on an active continental margin

Hale

Ogston

2015

JGR Earth Surface

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Wave‐supported fluid muds (WSFM) are a type of gravity flow that can rapidly transport sediment across continental margins. They occur when wave‐induced bed stress maintains suspended‐sediment concentrations (SSC) >10 g L−1, and sediment‐induced stratification near the top of the wave boundary layer limits upward diffusion of sediment. Observations from near‐bed instrumentation are used to evaluate the conditions under which WSFMs form on the continental shelf offshore of the Waipaoa River, NZ. An event in July 2010 featured >130 h of energetic ocean conditions, and water discharge >1900 m3 s−1. A calibrated acoustic backscatter sensor at the midshelf measured near‐bed SSC >50 g L−1, with a strong lutocline occurring >15 cm above the predicted wave‐current boundary layer, resulting in ~5 cm deposition. A velocity anomaly occurred during this time, with offshore‐directed currents faster at 1 m above bed (mab) than at 3.5 mab. Using these observations, we empirically solve a simple buoyancy‐drag force balance to estimate the gravity‐driven velocity of the WSFM, which is always <0.03 m s−1. Extending the force balance across a shelf transect suggests that WSFM‐carried sediment can reach the shelf edge in 50–240 h. Spatial and temporal patterns of deposition predicted by the gradient of modeled sediment flux correlate well with seabed observations on the Waipaoa shelf reported in Walsh et al. (2014). This study highlights the importance of WSFMs for cross‐shelf sediment transport, despite relatively slow gravity‐driven velocities and the infrequency with which they occur.

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The large-scale distribution and internal geometry of the fall 2000 Po River flood deposit: Evidence from digital X-radiography

Cited by 72 publications

References 41 publications

Influence of distributary channels on sediment and organic matter supply in event-dominated coastal margins: the Po prodelta as a study case

Influence of distributary channels on sediment and organic matter supply in event-dominated coastal margins: the Po prodelta as a study case

The October 2000 flood at the Po river and Sesia river junction

In situ observations of wave‐supported fluid‐mud generation and deposition on an active continental margin

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