Affiliation and Title: Professor, Polytechnic University of Bari, Italy
Title of Presentation: HOW VEGETATION CAUSES AN ALTERATION OF HYDROLOGICAL CONDITIONS AND SPREADING PROCESS IN NATURAL FLOWS
Aquatic vegetation provides a wide range of ecosystem services. The uptake of nutrients and production of oxygen improve water quality. The widespread planting in waterways could strongly contribute to the removal of nitrogen and phosphorous. Seagrasses form the foundation of many food webs and vegetation promotes biodiversity by creating different habitats with spatial heterogeneity in the stream velocity. Marshes and mangroves reduce coastal erosion by damping waves and storm surge, as well riparian vegetation enhances bank stability. Even more in times of a changing climate, which could alter hydrological conditions, the monitoring of vegetation development is a fundamental activity in coastal and river management, to both protect ecological services and control flood or erosion risks. A further key point remains poorly investigated and still deserves a thorough study, that is the effect induced by vegetation or similar obstructions on a discharged effluent assumed as a turbulent jet. The present paper shows how vegetation greatly affects the jet entrainment, reversing it into a detrainment process, the diffusion and advection of the jet solute and particles and the jet momentum, demonstrating that it is one of the main cause of the river morphology alteration.
Michele Mossa is a professor of Hydraulics at the Polytechnic University of Bari (Italy), with a PhD in hydraulic engineering for the environment and land. He is the chief scientist of the Coastal Engineering Laboratory – LIC, a member of the board of directors of the National Consortium of Universities for Marine Sciences (CoNISMa) for the Polytechnic University of Bari, and a member of the Fluid Mechanics Committee of the International Association for HydroEnvironment Engineering and Research (IAHR). At the University, he was elected as the representative for the Academic Senate, is the coordinator of the PhD course in "Environmental and Building Risk and Development," and is Deputy Rector of Research and Transfer for the University. He has served as a member of the IAHR council, as president of the IAHR Education and Professional Development Section, and as the expert reviewer of research project grant applications in Hydraulics and Oceanography for both the Research Council of Norway and the OeAD (Österreichische Austauschdienst) GmbH Austrian Agency for International Cooperation in Education and Research. He is associate editor of Scientific Reports - Nature, Journal of Hydraulic Research, Environmental Fluid Mechanics, Engineering & Computational Mechanics, Journal of Multidisciplinary Science, Insight - Civil Engineering, Global Journal of Engineering Science and Researches, SCIRES-IT - SCIentific RESearch and Information Technology, Water, and Heliyon. The main topics of his research are relevant to Environmental and Maritime Hydraulics. He is author of many papers and books, and is actively involved in international and Italian research projects.