Publications de Giulio Calvani

Assessing the Weighted Usable Area for the Habitat Suitability of brown trout (Salmo trutta L.) in rivers

Giovanni De Cesare, Paolo Perona, Giulio Calvani, Francesca Padoan

To address the global loss of biodiversity in freshwater environments, understanding river habitat requirements for key species, such as brown trout (Salmo trutta L.), is crucial. The Habitat Suitability Index (HSI) aids ecologists in identifying preferred ...

CRC Press2025

On the duration of flood hydrograph using the Compound Poisson Process approximation

Paolo Perona, Giulio Calvani

River engineering projects are usually designed based on the peak discharge concept. However, some river processes depend on the shape and duration of the flow hydrograph, and their modelling is particularly relevant for designing protection and retention ...

CRC Press2025

Mean hydrograph event from exact ensemble averages of stochastic trajectories

Paolo Perona, Giulio Calvani

The design of hydraulic structures, flood protection systems, and river management strategies often relies on the peak-flow discharge associated with a specific return period. However, many river processes are related to the shape and duration of the entir ...

Elsevier BV2025

Uncertainty analysis of field trials of low-cost Bi-TiO_2 -P25 solar photocatalyst for sustainable water treatment

Paolo Perona, Giulio Calvani

Solar photocatalysis has the potential to reduce chemical and microbial contaminants in water and make it safer for consumption in an effective and sustainable manner. This has been studied and proven well under laboratoryscale conditions. In our previous ...

2025

Hydraulic drive framework on habitat suitability enhances movement bias of brown trout in stream networks

Giovanni De Cesare, Paolo Perona, Giulio Calvani, Francesca Padoan

Freshwater ecosystems face increasing threats from human activities and climate change, thus requiring efforts to reduce impacts and prevent further deterioration. Restoration projects for riverine environments often rely on hydraulic, habitat, and metapop ...

2025

Towards unified scaling relationships for gravel-bed and sand-bed rivers

Paolo Perona, Giulio Calvani

Laboratory flume experiments and field investigations demonstrated the existence of dynamic equilibrium conditions for river channels, according to the hydraulic (flow discharge, water depth) and morphological (bed slope, grain size distribution, cross-sec ...

2025

Ecological and biogeomorphological modelling of brown trout (Salmo trutta L.): Hints for improvements

Giovanni De Cesare, Paolo Perona, Giulio Calvani, Francesca Padoan

The loss of biodiversity in freshwater environments is becoming an increasing problem globally. As a result, many tools have been developed and improved to reduce this decline. However, there is still a need for the identification and evaluation of precise ...

Wiley2024

A novel tube law analysis under anisotropic external load

Giulio Calvani

Mathematical and physical modeling of flows in collapsible pipes often relates the flow area to the difference between the internal and the external pressures (i.e. the transmural pressure). The relation is used to model the conduits of the human body tran ...

Nature Research2024

Splitting probabilities and mean first-passage times across multiple thresholds of jump-and-drift transition paths

Paolo Perona, Giulio Calvani

We apply the stochastic-trajectory analysis to derive exact expressions for the mean first passage times of jump-and-drift transition paths across two or more consecutive thresholds. We perform the analysis of the crossing statistics in terms of dimensionl ...

2023

Insights Into the Dynamics of Vegetated Alternate Bars by Means of Flume Experiments

Giulio Calvani

Alternate bars are bedforms recognizable in straight or weakly curved channels as a result of riverbed instability. The length and height of alternate bars scale with the river width and the water depth, respectively. During low water stages, alternate bar ...

American Geophysical Union2023