A5013803332- Hydrology and Sediment Transport Processes
- Flood Risk Assessment and Management
- Hydraulic flow and structures
- Hydrology and Watershed Management Studies
- Remote Sensing and LiDAR Applications
- Hydrology and Drought Analysis
- Image and Video Stabilization
- Soil erosion and sediment transport
- Advanced Vision and Imaging
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Dam Engineering and Safety
- Flow Measurement and Analysis
- Water resources management and optimization
- Water Systems and Optimization
- Remote Sensing in Agriculture
- Soil Moisture and Remote Sensing
- Probabilistic and Robust Engineering Design
- Optical Systems and Laser Technology
- Adaptive optics and wavefront sensing
- Fluid Dynamics and Turbulent Flows
- Diabetes, Cardiovascular Risks, and Lipoproteins
- Optical measurement and interference techniques
- Complex Systems and Time Series Analysis
- Landslides and related hazards
Diego Portales University
2021-2025
University of Naples Federico II
2021
University of Basilicata
2016-2020
Glasgow Life
2020
University of Concepción
2017
European Southern Observatory
2006-2007
Gamma-ray burst (GRB) emission is believed to originate in highly relativistic fireballs. Currently, only lower limits were securely set the initial fireball Lorentz factor Gamma_0. We aim provide a direct measure of The early-time afterglow light curve carries information about Gamma_0, which determines time peak. have obtained early observations near-infrared afterglows GRB 060418 and 060607A with REM robotic telescope. For both events, peak could be clearly singled out, allowing firm...
Image velocimetry has proven to be a promising technique for monitoring river flows using remotely operated platforms such as Unmanned Aerial Systems (UAS). However, the application of various image algorithms not been extensively assessed. Therefore, sensitivity analysis conducted on five different including Large Scale Particle Velocimetry (LSPIV), Large-Scale Tracking (LSPTV), Kanade–Lucas Tomasi (KLT-IV or KLT), Optical (OTV) and Surface Structure (SSIV), during low flow conditions...
Abstract The hydrologic sciences and water resources management have long depended on a combination of in situ measurements remotely sensed data for research regulatory purposes. In are constrained their spatial distribution by both logistics costs. Satellite‐ manned aircraft‐based remote sensing provide spatially broad data, but often coarse resolution. Furthermore, all these collection methods limited ability to respond specific short‐term events when the imagery could inform real‐time...
Abstract. Bridges are critical-infrastructure components of road and rail transport networks. A large number these critical assets cross or adjacent to waterways floodplains therefore exposed flood actions such as scour, hydrodynamic loading, inundation, all which exacerbated by debris accumulations. These stressors widely recognized responsible for the vast majority bridge failures around world, they expected be due climate change. While efforts have been made increase robustness bridges...
The time-dependent bridge pier scour during flood waves is analysed. Scour experiments were conducted in a novel installation able to produce complex hydrographs with high precision. Experimental data used test formulas including new mathematical model. Results confirm the reliability and superior performance of proposed dimensionless, effective flow work based model under steady unsteady hydraulic conditions. Analyses highlight impact different on scour, demonstrating strong control by...
Abstract. Since the turn of 21st century, image-based velocimetry techniques have become an increasingly popular approach for determining open-channel flow in a range hydrological settings across Europe and beyond. Simultaneously, large-scale image algorithms been developed that are equipped with differing pre-processing analytical capabilities. Yet operational hydrometry, these utilised by few competent authorities. Therefore, imagery collected analysis (along reference data) is required...
The local scour and sediment deposition at a bridge pier during flood waves is analyzed to investigate the effects of different flow regimes (regulated unregulated discharges with or without excess supply). Concurrent field measurements streamflow were performed 6 days Rapel Bridge, over River (mean annual discharge, QMA=172 m3/s), located in Central Chile (71°44’9” W, 33°56’22” S). During measurements, river discharge was regulated by operation hydropower plant, 24 km upstream bridge, which...
Abstract. A novel metric for rainfall-runoff model calibration and performance assessment is proposed. By integrating entropy mutual information concepts as well uncertainty quantification through BLUECAT (likelihood-free approach), RUMI (Ratio of Uncertainty to Mutual Information) offers a robust framework quantifying the shared between observed simulated stream flows. RUMI’s capabilities calibrate models demonstrated using GR4J over 99 catchments from various macroclimatic zones, ensuring...
The ratio of uncertainty to mutual information (RUMI) is proposed as a new and novel objective function for rainfall-runoff model calibration. Uncertainty quantified by means BLUECAT (likelihood-free approach), whereas through entropy-based concepts. deterministic GR4J considered illustrate RUMI’s calibration capabilities over around 100 catchments in Chile. Those have pseudo-natural hydrological regime are located different macroclimatic zones. Calibration with the Kling-Gupta...
The pier scour caused by flood waves is analyzed, introducing the dimensionless effective work flow on sediment bed around pier, W*. three-parameter exponential function adopted to relate normalized depth Z* with A novel experimental installation able reproduce any hydrograph high precision in laboratory flume described and used carry out four series of experiments order calibrate validate proposed relation. first consists constant discharge until advanced stages scour. second third use...
Local scour is a dynamic process evolving during the lifetime of bridges as result changes in hydrologic and hydraulic conditions. Current approaches for risk assessment are generally based on evaluation equilibrium depth flood event with prefixed return period. The temporal evolution bridge-pier usually disregarded, by assuming that conditions always attained, regardless properties. However, recent studies have highlighted importance accounting contribution multiple events their exact...
River flow monitoring is essential for many hydraulic and hydrologic applications related to water resource management flood forecasting. Currently, unmanned aerial systems (UASs) combined with image velocimetry techniques provide a significant low-cost alternative monitoring, allowing the estimation of river stream flows surface velocities based on video acquisitions. The accuracy these methods tends be sensitive several factors, such as presence floating materials (transiting onto...
Abstract. River monitoring is of particular interest as a society that faces increasingly complex water management issues. Emerging technologies have contributed to opening new avenues for improving our capabilities but also generated challenges the harmonised use devices and algorithms. In this context, optical-sensing techniques stream surface flow velocities are strongly influenced by tracer characteristics such seeding density their spatial distribution. Therefore, principal research...
Inland water is fundamental for the conservation of flora and fauna a source drinking humans; therefore, monitoring its quality ascertaining status essential making decisions in resources management. As traditional measuring methods present limitations with high spatial temporal coverage, using satellite images to have greater control over lake observation can be handy tool satisfactory results. The study chlorophyll-a (Chl-a) has been widely used ascertain inland aquatic environment remote...
The goal of this paper is to introduce the first clear-water scour model based on both informational entropy concept and principle maximum entropy, showing that a variational approach ideal for describing erosional processes under complex situations. proposed bridge–pier entropic (BRISENT) capable reproducing main dynamics depth evolution steady hydraulic conditions, step-wise hydrographs, flood waves. For calibration process, 266 experiments from 20 precedent studies were considered, where...
<p>Image velocimetry (IV) is a remote technique which calculates surface flow velocities of rivers (or fluids) via range cross-correlation and tracking algorithms. IV can be implemented camera sensors mounted on tri-pods, or Unmanned Aerial Systems (UAS). has proven powerful for monitoring river flows during flood conditions, whereby traditional in-situ techniques would unsafe to deploy. However, little research focussed upon the application such low conditions. The...