FLUVIAL HYDRAULICS
Stampa
Enrollment year
2020/2021
2021/2022
Regulations
DM270
ICAR/01 (HYDRAULICS)
Department
DEPARTMENT OF CIVIL ENGINEERING AND ARCHITECTURE
Course
CIVIL ENGINEERING
Curriculum
Idraulico
Year of study
Period
1st semester (27/09/2021 - 21/01/2022)
ECTS
6
Lesson hours
51 lesson hours
Language
English
Activity type
ORAL TEST
Teacher
GHILARDI PAOLO (titolare) - 3 ECTS
FENOCCHI ANDREA - 3 ECTS
Prerequisites
Basic knowledge of hydraulics or fluid mechanics. A basic knowledge of GIS software would be beneficial.
Learning outcomes
Students will learn the basics of hydraulics of natural streams, solid transport mechanics and related hydrodynamic processes, and how to deal with the one-dimensional modelling of an extended fluvial reach using the HEC-RAS and QGIS softwares.
Course contents
1. Basics of Natural Streams Hydrodynamics – Momentum and Energy equations, Turbulence and Velocity Distribution in Natural Streams Flows, Velocity and Bed Shear Stress Distribution.
2. Solid Transport Threshold – Hydrodynamic Drag and Lift on a Solid Grain, Threshold Velocity, Threshold Bed Shear Stress, Probabilistic Concept of Entrainment, Threshold of Nonuniform Sediment Motion.
3. Bed-Load Transport – Empirical Relationships Involving Bed Shear Stress, Discharge or Velocity; Probabilistic and Deterministic Concepts; Fractional Bed Load of Nonuniform Sediments.
4. Suspended-Load Transport – Diffusion Concept: Equation for Vertical Distribution of Sediment Concentration, Nonequilibrium Sediment Concentration Distribution, Suspended Load. Threshold Condition for Sediment Suspension. Wash Load.
5. Total-Load Transport – Direct and Indirect Method. Total-Load Transport of Nonuniform Sediments.
6. Bedforms – Ripples, Dunes, Antidunes, Chutes and Pools, Bars. Models for Prediction of Bedforms. Resistance to Flow Due to Bedforms: Methods for Stress Partitioning.
7. Numerical modeling of flow in rivers: Geometry preparation, initial and boundary conditions setting, steady- and unsteady-flow simulations, sensitivity analyses on the adopted parameters, preparation of a technical report.
Teaching methods
Lectures with slides and multimedia projection, focused on the physical processes of fluvial hydrodynamics; numerical exercises in
computer room interrupted by several theoretical explanations to justify what is done and how to extend it to other cases