Hydrodynamics at a microtidal inlet: Analysis of propagation of the main wave components

Melito, Lorenzo; Postacchini, Matteo; Sheremet, A.; Calantoni, Joseph; Zitti, Gianluca; Darvini, Giovanna; Penna, Pierluigi

doi:10.1016/j.ecss.2020.106603

Cited by 24 publications

(19 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is estimated as θ 0,l = θ 0 − θ coast , where θ coast ≈ 45 • is the angle between the normal to the coast and the North. As with the numerical simulations presented in [31] and in agreement with recent field observations of swell waves along the Senigallia coast during calm states and storm tales [52], long-crested waves with no directional spreading and T p = (5-10) s have been reproduced. Since the NSWE solver needs to be fed with both instantaneous water level and depth-averaged velocity, the spectral data of both baseline tests (Table 1) have been transformed into random free-surface time series using the method described in [53], which consists of the following steps: (i) spectrum discretization into a finite number of frequency intervals; (ii) setting of the wave characteristics of each frequency interval; (iii) summation of all waves (e.g., see [7]).…”

Section: The Numerical Simulationssupporting

confidence: 88%

Combining Numerical Simulations and Normalized Scalar Product Strategy: A New Tool for Predicting Beach Inundation

Postacchini

Ludeno

2019

JMSE

Self Cite

View full text Add to dashboard Cite

The skills of the Normalized Scalar Product (NSP) strategy, commonly used to estimate the wave field, as well as bathymetry and sea-surface current, from X-band radar images, are investigated with the aim to better understand coastal inundation during extreme events. Numerical simulations performed using a Nonlinear Shallow-Water Equations (NSWE) solver are run over a real-world barred beach (baseline tests). Both bathymetry and wave fields, induced by reproducing specific storm conditions, are estimated in the offshore portion of the domain exploiting the capabilities of the NSP approach. Such estimates are then used as input conditions for additional NSWE simulations aimed at propagating waves up to the coast (flood simulations). Two different wave spectra, which mimic the actual storm conditions occurring along the coast of Senigallia (Adriatic Sea, central Italy), have been simulated. The beach inundations obtained from baseline and flood tests related to both storm conditions are compared. The results confirm that good predictions can be obtained using the combined NSP–NSWE approach. Such findings demonstrate that for practical purposes, the combined use of an X-band radar and NSWE simulations provides suitable beach-inundation predictions and may represent a useful tool for public authorities dealing with the coastal environment, e.g., for hazard mapping or warning purposes.

show abstract

Section: The Numerical Simulationssupporting

confidence: 88%

Combining Numerical Simulations and Normalized Scalar Product Strategy: A New Tool for Predicting Beach Inundation

Postacchini

Ludeno

2019

JMSE

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, one of the observed winter storms well penetrated within the MR was characterized by a direction almost perpendicular to the MR mouth. This led to an upriver propagation of all wave components during the storm, especially the IG band, while the sea/swell components experienced a large breakinginduced decay at the mouth [10]. Sediment samples and water-surface elevations recorded along the MR also suggested an upriver propagation of the tidal forcing up to distances larger than ~2 km from the estuary [9].…”

Section: Introductionmentioning

confidence: 93%

“…In this context, a series of field studies has been recently carried out to better understand the wave propagation within the microtidal estuary and final reach of the Misa River (MR hereafter), located in the municipality of Senigallia (Marche Region, Italy) and flowing into the middle Adriatic Sea [8][9][10]. Two experimental campaigns were undertaken in September 2013 and January 2014, aiming at characterizing the main forcing actions interacting in the estuarine region.…”

Section: Introductionmentioning

confidence: 99%

Upstream Propagating Long-Wave Modes at a Microtidal River Mouth

Postacchini

Melito

Sheremet

et al. 2020

The 4th EWaS International Conference: Valuing the Water, Carbon, Ecological Footprints of Human Activities

Self Cite

View full text Add to dashboard Cite

We illustrate recent findings on the upriver propagation of long waves entering the mouth of the Misa River (Senigallia, Italy). Such a microtidal environment has been recently studied to understand river–sea interactions: it has been found that the river forcing dominates over the marine actions in winter, especially during storms. However, upriver wave propagation is not negligible with low-frequency waves propagating upriver for distances of the order of kilometers. With the aim to better understand the behavior of low-frequency waves propagating upriver, the analysis of the present work builds on field data collected by instruments installed close to the mouth and along the final reach of the Misa River: a tide gauge, two hydrometers and an acoustic Doppler sensor. It has been here observed that the tidal forcing (periods of the order of hours/days) is significantly strong at a distance of more than one kilometer from the river mouth, while shorter waves, like seiches (periods of some hours), are less important and are supposed to largely dissipate at the estuary, although their role could be of importance during relatively short events (e.g., floods).

show abstract

“…A third hydrometric station was operating during the analyzed period along the Tronto river, but this could not be used for the present analysis due to the strong tidal influence that is typically observed in microtidal environments, even some kilometers far from the river mouth [43].…”

Section: Baseflow Monitoring Strategymentioning

confidence: 99%

Quantifying the Impact of Evapotranspiration at the Aquifer Scale via Groundwater Modelling and MODIS Data

Colombani

Gaiolini

Busico

et al. 2021

Water

Self Cite

View full text Add to dashboard Cite

In shallow alluvial aquifers characterized by coarse sediments, the evapotranspiration rates from groundwater are often not accounted for due to their low capillarity. Nevertheless, this assumption can lead to errors in the hydrogeological balance estimation. To quantify such impacts, a numerical flow model using MODFLOW was set up for the Tronto river alluvial aquifer (Italy). Different estimates of evapotranspiration rates were retrieved from the online Moderate Resolution Imaging Spectroradiometer (MODIS) database and used as input values. The numerical model was calibrated against piezometric heads collected in two snapshots (mid-January 2007 and mid-June 2007) in monitoring wells distributed along the whole alluvial aquifer. The model performance was excellent, with all the statistical parameters indicating very good agreement between calculated and observed heads. The model validation was performed using baseflow data of the Tronto river compared with the calculated aquifer–river exchanges in both of the simulated periods. Then, a series of numerical scenarios indicated that, although the model performance did not vary appreciably regardless of whether it included evapotranspiration from groundwater, the aquifer–river exchanges were influenced significantly. This study showed that evapotranspiration from shallow groundwater accounts for up to 21% of the hydrogeological balance at the aquifer scale and that baseflow observations are pivotal in quantifying the evapotranspiration impact.

show abstract

Hydrodynamics at a microtidal inlet: Analysis of propagation of the main wave components

Cited by 24 publications

References 37 publications

Combining Numerical Simulations and Normalized Scalar Product Strategy: A New Tool for Predicting Beach Inundation

Combining Numerical Simulations and Normalized Scalar Product Strategy: A New Tool for Predicting Beach Inundation

Upstream Propagating Long-Wave Modes at a Microtidal River Mouth

Quantifying the Impact of Evapotranspiration at the Aquifer Scale via Groundwater Modelling and MODIS Data

Contact Info

Product

Resources

About