Search results for "River"
showing 10 items of 564 documents
Mixing processes in vegetated rivers: experimental investigation in a laboratory flume
2018
The presence of vegetation in rivers exerts an important ecological function and is very important to maintain suitable habitat. Especially in recent years, some researchers (among others Perrucca et al., 2007) have focused their attention on the role of vegetation in channel’s morphodynamics. Alteration of hydrological conditions in fluvial systems inevitably leads to changes in river morphology, riparian or riverbed vegetation and ecosystems. Riparian vegetation distribution could also change in time and in space depending on the combination of factors affecting the settling and growth of vegetated elements. In the present paper attention is focused on the turbulent and mixing processes i…
Entropic model application to identify cross-sectional flow effect on velocity distribution in a large amplitude meandering channel
2020
Abstract Literature shows the application of the entropy concept in open channels flow. No existing research has been addressed to the application of the entropy concept for evaluating the effect of secondary flow which especially develops in curved channels. The purpose of this paper is to explore the possibility to evaluate the effect of the secondary flow on the stream-wise velocity distribution starting only from the knowledge of the surface velocity and the entropic concept application. The analysis is conducted with the aid of data collected in a large-amplitude meandering laboratory flume for two different values of the width-to-depth ratio. Results show that the location of the maxi…
I ponti in Sicilia fra XVIII e XIX secolo attraverso la rappresentazione inconografica
2014
Il contributo presenta i primi esiti di una più ampia indagine sui ponti siciliani, finalizzato alla inventariazione dei materiali iconografici relativi alle strutture realizzate o progettate e mai costruite in Sicilia fra XVIII e XIX secolo. I disegni di architettura conservati negli archivi pubblici isolani consentono di verificare conoscenze, tecniche e prerogative dei professionisti chiamati a realizzare o a ristrutturare i ponti. L’intervento prende le mosse dalla celebre incisione del ponte sul fiume Milicia (1729) dell’architetto Ferdinando Fuga, oggetto di una lunga contesa, fino alle sperimentazioni con materiali innovativi e tecniche d’importazione attuate alla metà del XIX secolo…
I ponti in Sicilia fra XVIII e XIX secolo attraverso la rappresentazione iconografica
2013
La comunicación tiene como objetivo catalogar el material iconográfico relacionado con los puentes y los proyectos de puentes elaborados en Sicilia entre los siglos XVIII y XIX. A través de una investigación que estudie los dibujos arquitectónicos conservados en los archivos públicos, se pueden comprobar los conocimientos, las técnicas y las peculiaridades de los profesionales llamados a crear o a restaurar los puentes. Las características orográficas de la isla, rica en ríos de régimen torrencial obligó a una especial atención en este campo. De hecho, son frecuentes las polémicas y los debates en situaciones complejas enfrentando el constante peligro de derrumbe determinado por las inundac…
Boundary Shear Stress Distribution and Convective Accelerations: a forecast methodology of planimetric evolution of meandering channels
1999
Laboratory Measurements of Upstream Overdeepening
2000
Numerical simulation of non-equilibrium sediment transport in a flume
2012
Enhancing innovation capability and business opportunities : cases of SME-oriented applied research
2012
Beliefs and attitudes of Australian learner drivers toward driving and avoiding driving through floodwater
2023
Driving through floodwater is a significant cause of flood-related injury and mortality, and opportunities exist to embed safe driving messages regarding floodwaters to novice drivers in graduated driver licensing schemes. To inform future educational efforts, we investigated the beliefs and attitudes of Australian learner drivers about driving and avoiding driving through floodwaters. Methods: The study adopted a cross-sectional correlational design with measures drawn from the theory of planned behaviour and administered within an online survey. Phase 1 (N = 44 learner drivers) aimed to identify the core beliefs associated with driving through floodwater. Phase 2 (N = 250 learner drivers)…
Salt exploitation, communication routes and territory during the Iron Age around the Cabriel river valley
2020
La sal era un recurso fundamental en la economía de las sociedades antiguas y cada vez tenemos más datos sobre su aprovechamiento y explotación durante la Edad del Hierro en ámbito peninsular. La comarca de Requena-Utiel, en el interior de la provincia de Valencia, presenta la mayor abundancia de salinas continentales históricas del territorio valenciano. Por otro lado, en La Manchuela conquense se localiza la importante mina de sal de Minglanilla-La Pesquera. El hallazgo de material arqueológico ibérico en algunas de estas explotaciones sirve como punto de partida para analizar sus características y ver cómo pudieron quedar integradas en el patrón de asentamiento, así como en una densa red…