Fundamentals of Hydrology

科目ナンバリング U-ENG23 33517 LE73 開講年度・開講期 2021 ・ 前期
単位数 2 単位 授業形態 講義
配当学年 対象学生
使用言語 英語 曜時限 火3
教員 立川 康人 (工学研究科 教授)
市川 温 (工学研究科 准教授)
佐山 敬洋 (防災研究所 准教授)
萬 和明 (工学研究科 講師)
授業の概要・目的 The fundamental concept of hydrology is the hydrological cycle, which is various scale physical processes of water movements in the atmosphere, land surfaces, and oceans. Solar energy and gravity forces play major roles for the hydrological cycle. Solar energy drives the dynamic processes of water vapor formation from oceans and land surfaces, and transport of vapor in the atmosphere. The vapor changes to liquid and fall on the land surfaces as precipitation, then the flow of water on and under the land surfaces are driven by gravity. Hydrology is the study of the movement of water on and under the land surface and its applications to mitigate water-related disasters, develop water resources and preserve the environment. In the class, basic hydrological processes such as solar radiation, precipitation, evapotranspiration, infiltration, surface and subsurface flow, and river flow are described.
到達目標 The aim of the course is to understand the basic hydrological processes to obtain the knowledge for analyzing hydrological phenomenon and the engineering background for water resources development.
授業計画と内容 1. The hydrologic cycle: The contents of the class is overviewed and the concept of the hydrological cycle is provided. The role of hydrology in the field of civil engineering is described.
2. Precipitation: The mechanism of precipitation is described. A numerical rainfall prediction model and the mechanism of radar rainfall observation are described.
3. Interception and infiltration: The process of precipitation interception by trees is introduced. Then the governing equation of unsaturated flow and the basic equations of potential infiltration are explained.
4. Groundwater flow: The mechanism of rainfall-runoff in mountainous slope The mechanism of groundwater is explained. The physical equation to represent groundwater flow is derived from the continuity and momentum equations of water flow.
5-7. Surface runoff: The mechanism of rainfall-runoff in mountainous slope is explained. The kinematic wave equation is derived from the momentum equation of water flow, and then the analytical solutions of the kinematic wave model are provided. Rainfall-runoff modeling using the kinematic wave equation is explained.
8. Solar radiation and energy balance: Energy and water cycle driven by solar radiation is described. Basic mechanism of global warming ant its influence on hydrologic cycle is introduced.
9-11. Evaporaion and transpiration: The mechanism of water and energy cycle through evapotranspiration is described. Energy balance at land surface and the wind of boundary layer is introduced. Then, methods to measure the evapotranspiration is described.
12. Flood routing: The mechanism of flood routing is explained. Numerical representation method to represent channel network structure is introduced, then typical flow routing methods are described.
13. Exercise 1: Students do exercises on hydrologic cycle, precipitation, solar radiation and energy balance, and evaporaion and transpiration.
14. Exercise 2: Students do exercises on interception and infiltration, groundwater flow, surface ruonff, and flood routing.
<< Examination >>: Final examination is conducted.
15. Feedback: Questions from students are accepted.
成績評価の方法・観点 Student achievement is evaluated based on the final examination (around 90%) and their usual performance including quiz, reports and attitude towards the class (around 10%).
履修要件 It is desiarable to study Hydraulics (2nd year) and probability and statistical analysis (2nd year).
授業外学習(予習・復習)等 Read the handouts to understand contents to be given in lectures and to gain deep understanding of unclear points of the lectures.
教科書 English handouts based on "エース水文学(朝倉書店)isbn9784254264784" and "例題で学ぶ水文学(森北出版)isbn9784627496316" will be provided.