OB & OG

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Fukushima University

Watershed Hydrology Group in Graduate School of Symbiotic Systems Science & Faculty of Symbiotic Systems Science

 (FY2010-2023, 83 members in total [ = 68 Bachelors +13 Masters+1 Doctor] and 1 Post-Doctororal fellow)

Research staff

April 2020-May 2022

1. Chris LEONG, currently at Research Institute for Humanity and Nature (RIHN)

Doctoral course (total = 1 graduate)

FY2017-2019

1. Chris LEONG : Estimating and understanding flow duration curves from climatic conditions and dominant rainfall-runoff processes of a catchment

Master course (total = 13 graduates)

FY 2023-2024

1. Eisuke ARAKI: Exploring the conditions for wind ripple generation using the Werner model

2. Kazuma SAITO: Study on the influence of watershed rainfall-runoff processes on the development of spatial representativity of river discharge

FY2022-2023

1. Mayu TATENO: Estimating suspended sediment dynamics by river water sampling at the estuary area of the Abukuma River
   
   

FY2020-2022

1. Hikaru SATO: Developing a method for predicting water levels in small and medium-sized rivers using inverse estimation of rainfall-runoff processes
   
   

FY2021-2022

1. Haruki GOTO: Exploring controling factors of channel network formation based on the maximum entropy production principle

2. Koichiro HAYANO: Developing a framework of rainfall-runoff modeling using inverse estimation of rainfall-runoff processes
   
   

FY2016-2017

1. Hidemi TAKAHASHI : Estimating watershed-scale carbon flow in terms of satellite-based estimation of carbon fixation and field-based estimation of carbon outflow in river water.
   
   

FY2018-2019

1. Chris LEONG: Estimating and understanding flow duration curves from climatic conditions and dominant rainfall-runoff processes of a catchment
   
   

FY2015-2016

1. Yudai SHIKANO : Investigating storage-discharge mechanisms of 137Cs in a catchment area of waste water treatment plant in Fukushima.

2. Takahiko CHIBA : Estimating watershed-scale water storage in the mountainous areas of Kyushu region, Japan.

FY2013-2014

1. Syuhei KOBAYASHI : Catchment-scale preciptation recharge and storage change in headwater catchments

2. Yasuyoshi WATANABE : Surface water measurements and monitorings at the Goshiki-numa ponds in the Bandai-Asashi National Park, Japan.

FY2011-2012

1. Nagomu KOMATSU : What controls the shape of flow duration curves of the world?  

Bachelor course (total = 68 graduates)

FY2024

1. Jo AKAI: Virtual experiment on the effects of planned inundation in the Mogami River basin using a rainfall-runoff-inundation model

2. Ryota SUZUKI: Estimating transport process of dissolved organic carbon in the downstream of the Abukuma River using continuous observation data

3. Shion NAGASAWA: Estimating suspended sediment transport process in the downstream of the Abukuma River using continuous turbidity data

4. Ryuto FUKUSHIMA: Estimating hydro-power development and hydrogen generation potentials by using unutilized dam-reservoir discharge

5. Taishin IMAI: Investigating spatial-scale dependency of rainfall-runoff-inundation model parameters

FY2023

1. Haruto ABE: Exploring the controlling factors of the channel network by using rainfall-runoff-inundation model

2. Ryuto UGAJIN: Improving rainfall-runoff-inundation model for preliminary study of planned inundation in the Abukuma River watershed

3. Kouki KANNO: Expploring modeling methodology of land surface processes in inverse estimation method of rainlfall-runoff processes

4. Kouta WATANABE: Estimating nutrient supply from the Abukuma River basin to the ocean and its variability characteristics
   
   
   

FY2022

1. Eisuke ARAKI: Modeling riverbed waves using reaction-advection-diffusion equation

2. Kazuma SAITO: Studing the appearance of spatial representativity in river discharge

3. Katsuya TASAKI: Estimating river water level by using inverse estimation method of rainfall-runoff processes
   
   
   

FY2021

1. Ryoya KIMURA: Understanding the mechanisms spatial scale dependence of rainfall-runoff processes

2. Mayu TATENO: Estimating balance and transport of suspended sediments in Japanese first class river watersheds

3. Shintaro TOMIYAMA: Estimating suspended sediment production by grain size in a mountainous watershed

4. Rena BANNAI: Estimation of rainfall-runoff processes and water quality formation mechanisms using river discharge and water quality data

FY2020

1. Chiharu Oshikiri : Modeling of daily forest fire occurrence probability at 1-km grid level in Japan

2. Keita Onodera : Estimating carbon balance and dynamics in ungauged basins

3. Yudai Kuwabara : Verifying estimation method of flow duration curves in ungaged basins

4. Haruki Goto : A preliminary study on the controlling factors of channel networks based on the principle of maximum entropy production 

5. Koichiro Hayano : Data-based modeling of dominant rainfall-runoff processes in small river watersheds

6. Taketo Mizukami : Identifying dominant rainfall-runoff processes and water quality generation mechanisms in Higashi-karasu river watershed

FY2019

1. Kentaro KAMIO : Estimation and validation of Japanese forest fire frequency by using satellite data.

2. Takeshi SAKAIRI : Investigating generation mechanisms of spatial representativeness in river flow variability by using identification method of dominant rainfall-runoff process.

3. Hikaru SATO : Developing an estimation method of slope-failure occurrence by using water-level data.

4. Shunya FURUKAWA : Relationship between dominant rainfall-runoff mechanisms and water quality in Higashi-karasu river watershed.

5. Ryota MUROI : Estimating carbon balance and outflow variability in Higashi-karasu river watershed. 

6. Yuki YOKOYAMA : Investigating governing rules and geometric representation of channel network structure.

FY2018

1. Ren IWASAKI : Predicting forest fire frequency under climate change.

2. Susumu SAITO : Estimating carbon balance of Higashi-karasu river watershed.

3. Kaede SUZUKI: Estimating rainfall-runoff processes and water quality generation mechanisms.

4. Kohei YOKOYAMA : Spatial scale dependency and representativeness of rainfall-runoff processes.

FY2017

1. Itsuki HONDA : Estimating mechanisms behind spatial scale dependency of rainfall-runoff processes.

2. Susumu MATSUMOTO : National scale mapping of rainwater recharge by using inverse estimation of rainfall-runoff processes.

3. Kaoru YOSHIDA .: Snow-accumulation and snow-melt modeling by using inverse estimation of rainfall-runoff processes.

4. Naoto YUSA : Satellite-based estimation of forest fire occurrences in Japan.

FY2016

1. Eito HASEGAWA : Investigating the relationship between watershed-scale water storage and the occurrences of sediment disaster in Japan.

2. Hidenori NAGANO : Relationship between river water quality and rainfall-runoff mechanisms in Higashi-karasu river watershed, Fukushima, Japan.

3. Hotaru OSHIKIRI : Estimating forest fire occurrences in terms of physiographic conditions in Japan.

FY2015

1. Shintaro ABE : Slope failure potential and watershed-scale storage of rainfall.

2. Ryo HASUNUMA : Model-based study on the increasing pH in the Lake Inawashiro.

3. Akira KATO : Scale dependency in rainfall-runoff modeling.

4. Junya KANNO : Forest fire occurrence and its statistical causes.

5. Koki MINAKAWA : Exploring water quality tracers of inflow to the Bishamon pond, Urabandai, Japan.

6. Atsushi SUGAWARA : Monitoring and modeling of inflow to the  Bishamon pond, Urababdai, Japan.

FY2014

1. Takahiko CHIBA : Estimating watershed-scale rainfall storage.

2. Daiki FUJIMOTO : Rainfall-runoff process identification by means of discharge monitoring and data analysis.

3. Shoya HIROSE : Rainfall-runoff process identification by means of water quality monitoring and data analysis.

4. Yushi KANNO : Reducing model structural uncertainty in rainfall runoff modeling.

5. Yudai SHIKANO : An advection-diffusion model of Cs-137 in Fukushima.

FY2013

1. Kentaro HAGA : Toward identification of structure and parameter of rainfall-runoff model by using hydrograph separation.

2. Kenshu HARADA : Exploring the relationships between physiographic characteristics and shapes of flow duration curves in Japanese mountainous watersheds.

3. Jun MIURA : Relationship between quantity and quality of surface water flowing into the Bishamon Pond during a snowmelt season.

4. Naoya MIURA : Variability and its modeling of Cs-137 concentration in the dehydrated sewage sludge in Fukushima.

5. Kenta SATO : A literature review and a proposal toward precise numerical simulation of soliton fission wave.

6. Yuichi SATO : Exploring the relationships between low-flows and physiographic watershed characteristics.

FY2012

1. Yuki MIURA : Topographic characterization of watersheds and its implications to rainfall-runoff processes.

2. Hikaru NISHIYAMA : Suggesting an identification scheme for rainfall-runoff processes of watersheds.

3. Satoshi OKAZAKI : Estimating catchment-scale precipitation and evapotranspiration.

4. Shoma RYUZAKI : Flood frequency analysis for watershed planning and management.

FY2011

1. Toru KANDA : Estimating spatial distribution of supplies and demands of water, food and energy in the Abukuma river watershed.

2. Syuhei KOBAYASHI : Estimating storage changes of mountainous watersheds in the Tohoku region.

3. Hideaki MATSUZAWA : Community structure of aquatic biota in the upper Shiroishi river basin.

4. Masakiyo TASAKI : Flood frequency analysis of the Abukuma river by using intensity-duration-frequency (IDF) curve.

FY2010

1. Masaya ANDO : Investigating physical and chemical profiles of snow cover and temporal variation of snowmelt water chemistry for understanding snowmelt processes.

2. Tomohiro HAGA : Hourly hydrograph separation for the Abukuma river based on numerical filter technique and water quality data.

3. Ryo KIMURA : Effects of geographic characteristics of watersheds on the flow regimes in Japanese mountainous areas.

Ashikaga Institute of Technology

Department of Civil Engineering

(FY2005 - FY2007, 19 members in total）

Bachelor course (total = 19 graduates)

FY2007

• 1. Yuichi KAMEDA : Estimating recalcitrant organic matter concentration in river water.

  2. Futoshi KONDO : Estimating the capacity of anthropogenic activity in a watershed from the viewpoint of organic matter concentration in river water.

  3. Shinsuke SEKIGUCHI : Effect of watershed climatic condition on flow duration curve.

  4. Kazuya TAKAYAMA : Estimating the capacity of anthropogenic activity in a watershed from the viewpoint of organic matter concentration in river water.

  5. Makoto TAKEDA : Effect of watershed climatic condition on flow duration curve.

  6. Fumiya HATTORI : Estimating recalcitrant organic matter concentration in river water.

FY2006

• 1. Atsushi SATO : Simple estimating method of recalcitrant organic matter concentration in river water.

  2. Kyohei ABE : Spatio-temporal variation of organic matter concentration in Watarase River watershed.

  3. Kouji IZUMI : Spatio-temporal variation of organic matter concentration in Watarase River watershed.

  4. Shuichi ICHIKAWA : Simple estimating method of recalcitrant organic matter concentration in river water.

  5. Takayuki KINAMI : Spatio-temporal variation of organic matter concentration in Watarase River watershed.

  6. Ayako KUDO : Simple estimating method of recalcitrant organic matter concentration in river water.

FY2005

• 1. Kazutaka HOSHI : Relationship between BOD and TOC in Watarase River watershed.

  2. Tsuyoshi IKEDA : Effect of watershed physiographic conditions on flow duration curve.

  3. Haruki UEHARA : Effect of watershed physiographic conditions on flow duration curve.

  4. Atsushi SEKIGUCHI : Testing applicability of REW modeling approach.

  5. Masaki MIYASHITA : Testing applicability of REW modeling approach.

  6. Jinichi YAGUCHI : Relationship between BOD and TOC in Watarase River watershed.

  7. Yuta YOSHIKAWA : Simple estimation method of seasonal typhoon landfalling.