Course Title : Sediment Hydraulics

Code 10A040
Course Year Master and Doctor Course
Term 1st term
Class day & Period Mon 2nd
Location C1-191
Credits 2
Restriction No Restriction
Lecture Form(s) Lecture
Language Japanese
Instructor Hitoshi Gotoh and Eiji Harada,

Course Description

Natural flows in river and coast are movable bed phenomena with the interaction of flow and sediment. At a river and a coast, a current and a wave activate a sediment transport and bring the topographical change of a bed such as sedimentation or erosion. This lecture provides an outline about the basics of sediment (or movable bed) hydraulics, and detail of the computational mechanics of sediment transport, which has been developed on the basis of dynamics of flow and sediment by introducing a multiphase flow model and a granular material model. Furthermore, about sediment and water-environment relationship, some of frontier technologies, such as an artificial flood, removal works of dam sedimentation, coastal protection works, and sand upwelling work for covering contaminated sludge on flow bottom etc., are mentioned.

Grading

Grading is based on student’s activities in lectures and written examination.

Course Goals

Students understand the basics of sediment hydraulics and outline of advanced models for computational sediment hydraulics, such as multiphase flow model and granular material model. Students understand the present conditions of sediment control works.

Course Topics

Theme Class number of times Description
Introduction 1 The purpose and constitution of the lecture, the method of the scholastic evaluation are explained.
Basics of sediment hydraulics 5 Physical characteristic of a movable bed and a non-equilibrium sediment transport process and its description are explained. Furthermore, the prediction technique of topographical change due to current and waves is outlined.
Computational mechanics of sediment transport: The state of the art 8 Essential parts of numerical models of the movable bed phenomena, which has been developed by introducing dynamic models such as a granular material model to describe a collision of sediment particles and a multiphase flow model to describe a fluid-sediment interaction, are described. In comparison with the conventional movable bed computation, the points on which has been improved to enhance the applicability of the models are concretely mentioned. Some frontier studies of sediment transport mechanics are also introduced.
Achievement cofirmation 1 Comprehension check of course contents.

Textbook

Hitoshi Gotoh: Computational Mechanics of Sediment Transport, Morikita Shuppan Co., Ltd., p.223, 2004 (in Japanese).

Textbook(supplemental)

Non

Prerequisite(s)

Undergraduate-level Hydraulics or Hydrodynamics is required. Because a commentary easy as possible is kept in mind by lectures, students without these prerequisite are welcomed.

Independent Study Outside of Class

Review fundamental items of hydraulics or hydrodynamics.

Web Sites

Non

Additional Information

Non