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River System Engineering and Management

It is necessary to consider the complex interaction system between natural forces, natural environment and socio-economic activities caused by human-beings to resolve various problems related to water in river basins and cities.

Toward the development of diverse capabilities of people and nature, we are studying on the fundamental subjects and its applications listed below :

  1. Primary factor analysis to environmental changes in river basins and cities
  2. Numerical simulation of river flows and river channel processes and its application of river basin planning
  3. Eco-hydrodynamics of Lakes
  4. Urban water problem including storm water drainage modeling, water supply system, ground water behavior, etc.
  5. Urban geo-water system engineering and management

Academic Staff

Takashi HOSODA

Takashi HOSODAProfessor (Graduate School of Engineering)

Research Topics

Toward the development of diverse capabilities of people and nature, my research subjects are described as follows:

  1. Numerical simulation of river flows and river channel processes and its application of river basin planning
  2. Primary factor analysis to environmental changes in river basins and cities
  3. Eco-hydrodynamics of Lakes
  4. Urban water problem including storm water drainage modeling, water amenity design, etc.

Contacts

Room 265, C cluster 1-3, Katsura Campus
TEL: +81-75-383-3266
FAX: +81-75-383-3271
E-mail: hosoda.takashi.4w@kyoto-u.ac.jp

Shinichiro ONDA

Shinichiro ONDAAssociate Professor (Graduate School of Engineering)

Research Topics

Development of numerical models, which can simulate flows and bed variations in river basins effectively, and its application. Current research is based on the following subjects.

  1. Flows in curved channel
  2. Development processes of micro scale sand waves and flow resistance
  3. Local scour around river structures
  4. Sloshing in storage tanks

Contacts

Room 266, C cluster 1-3, Katsura Campus
TEL: +81-75-383-3267
FAX: +81-75-383-3271
E-mail: onda.shinichiro.2e@kyoto-u.ac.jp

Research Topics

Numerical Model of River Flows and River Channel Processes and Its Applications to River Basin Planning

It is important to develop a numerical model of river flows and river channel processes to predict water stage during floods and scour depth around river structures and to design a stable channel including the ecological point of view.

We have developed various kinds of computational models such as a plane 2-D flood flow model with sediment transport, 3-D local scour model with a non-linear turbulence model, etc. in these years.

Figure 1 shows the simulated results on the initiation of river channel meandering caused by the generation of alternative bars, flow meandering and bank erosion.

These models are expected to apply the river basin planning effectively.

image1
Figure 1 Numerical simulation of initiation of river channel meandering

Figure 2 shows the calculated results on development processes of dunes. It is observed that a small disturbance generated at the upstream of bed propagates to the downstream with an increase in wave height, and as a result flow resistance is increased.
 

image51
Figure 2 Numerical simulation on development processes of dunes

 Urban Water System Engineering and Management

 

We have been investigating the water system in a urban area including following subjects :

  1. Urban storm water drainage modeling and its application
  2. Hydraulic analysis of urban water supply system and leakage detection
  3. Ground water behavior in urban area
  4. Hydraulic design of urban water amenity system

Figure 3 shows the water clock installed at Seibu Department Store, Yao Branch, which was designed by a French scientist, Dr. B. Gitton.

image2
Figure 3 Water clock designed by a French scientist, Dr. B. Gitton
(Seibu Department Store, Yao Branch)

Development of Water Environment Prediction Model

An eco-hydrodynamic model for a lake and an enclosed water basin has been developed to predict the future change of situation and to assess the effect of the global warming.

Figure 4 shows the seasonal variations of vertical distributions of dissolved oxygen in the north part of Lake Biwa.

It has been worried in these years that the dissolved oxygen near the bottom of lake will decrease gradually to zero as observed in other deep lakes. It is necessary to study the fundamental mechanism of seasonal variation of water quality items by using eco-hydrodynamic model for prediction.

image3
Figure 4 Seasonal variation of vertical distribution of dissolved oxygen in the north part of Lake Biwa

 

Laboratory Website

http://www.river-system.kuciv.kyoto-u.ac.jp/