A5014212441- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Hydrology and Watershed Management Studies
- Soil and Water Nutrient Dynamics
- Groundwater flow and contamination studies
- Hydraulic flow and structures
- Constructed Wetlands for Wastewater Treatment
- Coastal wetland ecosystem dynamics
- Peatlands and Wetlands Ecology
- Landslides and related hazards
- Fish Ecology and Management Studies
- Aeolian processes and effects
- Urban Stormwater Management Solutions
- Lattice Boltzmann Simulation Studies
- Environmental Toxicology and Ecotoxicology
- Physiological and biochemical adaptations
- Geological formations and processes
- Fluid Dynamics and Turbulent Flows
- Mine drainage and remediation techniques
- Toxic Organic Pollutants Impact
- Environmental Conservation and Management
- Effects and risks of endocrine disrupting chemicals
- Per- and polyfluoroalkyl substances research
- Heat and Mass Transfer in Porous Media
- Particle Dynamics in Fluid Flows
University of Padua
2016-2025
Centre hospitalier Robert-Ballanger
2018
CHU Dinant Godinne UCL Namur
2014
Engineering (Italy)
2000-2009
University of Auckland
2009
University of Bradford
2009
Wasser Cluster Lunz
2009
University of Vienna
2009
Hôpital Mère-Enfant
2008
University of Aberdeen
2000
Fifty years of hyporheic zone research have shown the important role played by as an interface between groundwater and surface waters. However, it is only in last two decades that what began empirical science has become a mechanistic devoted to modeling studies complex fluid dynamical biogeochemical mechanisms occurring zone. These efforts led picture surface-subsurface water interactions regulators form function fluvial ecosystems. Rather than being isolated systems, bodies continuously...
The contamination of riverbeds by solutes derived from the surface flow has recently received increasing attention. Channel morphological features such as bed forms are important characteristics stream‐subsurface interface and represent one control on rate solute delivery stream to bed. Generally, larger expected produce greater rates exchange. However, longitudinal dimension (wavelength) form is also important, this effect can penetration patterns that may be unexpected a visual observation...
Solute transport in rivers is controlled by surface hydrodynamics and mass exchanges between the stream distinct retention zones. This paper presents a residence time model for of solutes, Transport Rivers (STIR), that accounts effect stream‐subsurface interactions on river mixing. A stochastic approach used to derive relation in‐stream solute concentration distributions (RTDs) different domains. Particular forms RTD are suggested temporary storage within dead zones bed form–induced...
Ecologically-appropriate management of natural and constructed surface water bodies has become increasingly important given the growing anthropogenic pressures, statutory regulations, climate-change impacts on environmental quality. The development strategies requires that a number knowledge gaps be addressed through interdisciplinary research efforts particularly focusing water-biota water-sediment interfaces where most critical biophysical processes occur. This paper discusses current...
The main characteristics of local scouring downstream bed sills, forming a staircase-like system in high-gradient streams with non-uniform alluvium, have been investigated through 13 clear-water laboratory runs. Three initial longitudinal slopes and different flow rates were considered, keeping the same distance between baffles. grain size distribution sediment is that real alpine torrent scaled to model dimensions. measured scour depth, length shape are compared previous results concerning...
Surface‐subsurface exchange fluxes are receiving increasing interest because of their importance in the fate contaminants, nutrients, and other ecologically relevant substances a variety aquatic systems. Solutions have previously been developed for pore water flows induced by geometrical irregularities such as bed forms cases homogeneous sediment beds idealized heterogeneous beds, but these solutions not accounted fact that streambed sediments subject to sorting processes often produce...
Anthropogenic structures (e.g. weirs and dams) fragment river networks restrict the movement of migratory fish. Poor understanding behavioural response to hydrodynamic cues at currently limits development effective barrier mitigation measures. This study aimed assess effect flow constriction associated patterns on eel behaviour during downstream migration. In a field experiment, we tracked movements 40 tagged adult European eels (Anguilla anguilla) through forebay redundant hydropower intake...
Abstract Fish exhibit complex social behaviours that can influence their stress levels and well-being. However, little is known about the link between interactions in wild fish, especially running water environments. While many studies have explored axis most focused on specific contexts, leaving gaps understanding responses to changes. Our study investigated collective behaviour Italian riffle dace ( Telestes muticellus ) a controlled experimental setup simulating natural river system....
Experimental results are presented about long term local scouring downstream of bed sills in monogranular gravel beds. Two sets tests were performed a tilting flume at HR Wallingford, UK, 1996 and 1997, the main difference between being size sediments used. A dimensional analysis problem scour was carried out used to analyse experimental results. The introduction new variable, 'morphological jump', permits derivation two empirical formulas predict maximum depth length hole equilibrium. In...
In evaluating the resistance of sediment particles to entrainment by action flow in a river, grain geometry is usually characterized using representative sizes. This approach has been dictated, initially lack physical insight, but more recently analytical tools able describe 3‐D nature surface organization on water‐worked beds. Laboratory experiments are presented where mixed size beds were mobilized under range hydraulic and input conditions. Detailed bed topography was measured at various...
Scour holes below 73 grade‐control structures (check dams and bed sills) in six mountain rivers located the eastern Italian Alps have been surveyed. The most likely formative water discharge is used to evaluate jet thickness at each structure, which along with drop height, appears determine scour hole dimensions, as shown by consistent trends observed for nondimensional plots of both maximum depth length versus respective ratio. Sediment differences regarding size lithology apparently play a...
Results of laboratory experiments conducted on time evolution the scouring phenomenon at bed sills are presented. Starting from previous findings long-term depth and length local scour hole downstream sills, 12 long-duration tests were designed performed in Sloping Sediment Duct HR Wallingford Ltd., using uniform sand. No sediment feeding system was adopted. Video-recordings holes through glass-sided duct allowed successive image analysis to obtain water surface profiles over time. confirmed...
Abstract Sequences of artificial steps are sometimes used to reproduce the natural step–pool morphology high‐gradient streams. The depth, length and shape scour holes in gravel‐bed rivers can be predicted reasonably using recently developed formulae. However, properties affected by distance between structures. This effect is called ‘geometrical interference’ leads a reduction hole compared its potential size. Geometrical interference may occur sequences torrents, where structures built at...
This study analyzes the effect of advective pumping and pore scale dispersion on bed form–induced hyporheic exchange. Advection play a competitive role in exchange dynamics between porous medium overlying stream: Advective fluxes first lead solutes deep into then back to stream water, whereas dispersive favor transfer leading permanent mass retention. The combined produces complexity shape tails residence time distributions (RTDs), which follow at various stages process either power law or...
Hydrodynamic exchange between a stream and its bed plays an important role in solute transport rivers. Stream‐subsurface is known to occur due several different mechanisms approaches have been used model the resulting transport, but there has little investigation of ability various models represent specific processes. This work evaluates semiempirical transient storage (TSM) advective hyporheic driven by form‐induced pore water flows. The TSM based on idealized hypothesis that flux...
This paper presents the results of an experimental study about pattern local scouring generated at toe bed sills, which are commonly built in steep, gravel mountain streams. The aim this is to evaluate effect upstream sediment supply on scour depth and shape. experiments simulated conditions a steady had same grain size composition as deposit placed flume. geometric characteristics three holes developed under flow discharge were measured during 48 different tests. provided data set...
In recent decades, the interest in PFAS has grown exponentially around world, due to toxic effects induced by these chemical compounds humans, as well other animals and plants. However, current knowledge related antistress responses that organisms can express when exposed substances is still insufficient and, therefore, requires further investigation. The present study focuses on antioxidant Squalius cephalus Padogobius bonelli, significant levels of an area Veneto Region subjected a...
Abstract The local scouring downstream of bed sills forming a sequence for stabilization in steep channels has been investigated laboratory flume. initial slopes ranged from 0·078 to 0·148. alluvium was characterised by non‐uniform grain size distribution. results show that when the ratio between critical water depth h c and sill spacing L rises above characteristic value dynamics become heavily affected presence sill, associated with onset form “interference” which renders process less...
The transient storage model (TSM) is the most commonly used for stream–subsurface exchange of solutes. TSM provides a convenient, simplified representation hyporheic exchange, but its lack true physical basis causes parameters to be difficult predict. However, simple formulation makes useful practical tool many applications. This work compares with physically based pumping model. comparison advantageous two reasons: Advective known an important process in streams, and can derive...
Microbial biofilms are the prime site of nutrient and contaminant removal in streams. It is therefore essential to understand how affect hydrodynamic exchange, solute transport, retention systems where geomorphology induced hydrodynamics shape their growth structure. We experimented with large-scale streamside flumes streambed landscapes constructed from graded bedforms constant height wavelength. Each flume had a different bedform was covered layer gravel as substratum for benthic microbial...