Profiles and Activities : National University Corporation Fukushima University

Profile

Yoshiyuki Yokoo(Associate Professor)

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Affiliated Specialty Division Division of Environment System Management
Specialized Field of Study Watershed Hydrology
Final Academic Background Department of Civil Engineering, Graduate School of Engineering, Tohoku Universty
Academic Degree Ph.D.(Tohoku University)
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Courses In Charge

Introduction to Watershed Management and Planning
This lecture gives an overview of researches on watershed hydrology introducing current and future issues in this research area in order to master a viewpoint on such issues.
Watershed Management and Planning
This lecture instructs basic tools and skills that are necessary for watershed management and planning in a seminar style, so that students are capable of understanding and analyzing water issues by themselves.
Advanced watershed hydrology I
This lecture serves an opportunity to grasp mechanisms and modeling methodology for understanding hydrological cycles in different watersheds which consists of particular climatic, geographic, and biological conditions. It also explores interactions among hydrological cycles and anthropogenic impacts through hydrological and biogeochemical data.
Advanced Watershed Hydrology II
Following Advanced Watershed Hydrology I, this lecture focuses on hydrological cycle and its modeling of watersheds with different climatic and geographic conditions. In addition, anthropogenic impacts on hydrological cycle and interactions between hydrological cycle and vegetation activity are to be discussed as the closing of this lecture.

Main Research

Investigating the climatic and geographic controls on the shape of flow duration curve and mapping groundwater recharge potential
We invstigate the effects of climatic and geographic conditions of a watetershed on the shape of flow duration curve (FDC) so that we can draw FDC based on such conditions. We also try to generate a groundwater recharge potential map, as a biproduct of this research.
Understanding watershed hydrological cycle based on streamflow quantity and quality
The present study aims for understanding hyrological processes of a watershed based on streamflow quantity and quality.
Understanding streamflow response characteristics to climatic variability
The present study tries to understand the response of streamflow to climatic variability.

Introduction of Laboratory

The mission of our group is understanding the climatic and geogeaphic controls on hydrological cycle of a watershed. Not only socially valuable information but also outstanding intelligence reliable for the next century are the target outcomes of this group. We aim for producing talented people who can distinguish key processes inherent in observed hydrological data for understanding and modeling such processes.

Web site:
http://sites.google.com/site/fukushimawatershedhydrologye/home

Recent Writings, etc.

1. Takahashi, Y., Iwaya, T., Oki, T., Shimatani, Y., Takara, K., Tamai, N., Nonomura, K., Fujitoshi, M.:
Encycropedia of river,
Maruzen, 2009 (one of 190 authors).
2. Yokoo, Y., Oki, T.:
How should we classify surface geology to best explain the shape of flow duration curves in headwater basins?,
Annual Journal of Hydraulic Engieering, JSCE, Vol.53,pp.463-468,2009.
3. Yoshiyuki Yokoo, Murugesu Sivapalan, Taikan Oki:
Investigation of the Relative Roles of Climate Seasonality and Landscape Characteristics on Mean Annual and Monthly Water Balances,
Journal of Hydrology, Vol.357/3-4, pp.255-269,2008.
4. Yokoo, Y., Udo, K.:
Exploration of geographic watershed charactetistics shaping flow duration curve,
Annual Journal of Hydraulic Engineering, JSCE, Vol.51, pp.373-378,2007.
5. Yoshiyuki Yokoo,Murugesu Sivapalan:
Effect of Capillary Rise on Subsurface Runoff in the REW Modeling Framework,
Annual Journal of Hydraulic Engineering, Vol.50, pp.55-59, 2006.
6. Tada, T., Yokoo, Y., Shigemura, T.:
Indroducing stability in optimization of the Tank model parameters,
Journal of Japan Society of Civil Engineers, Vol.782/II-70, pp.1-10, 2005.

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