UNAMI Koichi

J-GLOBAL         Last updated: Jun 22, 2019 at 13:35
 
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Name
UNAMI Koichi
Affiliation
Kyoto University
Section
Graduate School of Agriculture, Division of Environmental Science and Technology
Job title
Associate Professor
Degree
Master of Agriculture, Doctor of Agriculture

Research Areas

 
 

Education

 
 
 - 
1994
Graduate School, Division of Agriculture, Kyoto University
 
 
 - 
1992
Faculty of Agriculture, Kyoto University
 

Committee Memberships

 
2004
 - 
2007
JRCSA  Secretary General
 

Awards & Honors

 
2003
Research Promotion Award, Kyoto Branch, Japanese Society of Irrigation, Drainage, and Reclamation Engineering
 

Published Papers

 
Koichi Unami, Osama Mohawesh, Rasha M. Fadhil
Applied Mathematics and Computation   353 418-431   Jul 2019
© 2019 Elsevier Inc. Operation of a water storage tank in a specific environment motivates mathematical studies on a discrete-time deterministic dynamic programming problem. The operator decides whether or not to open the valve releasing the water...
Abul Hasan Md Badiul Alam, Koichi Unami, Masayuki Fujihara
Journal of Environmental Management   223 676-684   Oct 2018
© 2018 Elsevier Ltd The water environment in diversely used rural artificial water bodies is generally varied with seasonal and diurnal changes, stability of which is significant in water resources management. Understanding of interaction among di...
Yuta Yaegashi, Hidekazu Yoshioka, Koichi Unami, Masayuki Fujihara
Communications in Computer and Information Science   946 425-438   Jan 2018
© 2018, Springer Nature Singapore Pte Ltd. Feeding damage from a fish-eating bird Phalacrocorax carbo to a fish Plecoglossus altivelis is severe in Japan. A stochastic impulse control model is introduced for finding the cost-effective and ecologic...
Unami K, Mohawesh O
Stochastic Environmental Research and Risk Assessment      2018   [Refereed]
Yaegashi Y, Yoshioka H, Unami K, Fujihara M
Journal of Environmental Management   219 18-27   2018   [Refereed]
Unami K, Mabaya G, Alam AHMB, Fujihara M
Environmental Pollution, Water Science and Technology Library   77 419-428   2018   [Refereed][Invited]
Mabaya G, Unami K, Takeuchi J, Fujihara M, Yoshioka H
International Journal of Innovation and Sustainable Development   11(1) 69-84   2017   [Refereed]
Mabaya G, Unami K, Fujihara M
Journal of Cleaner Production   146 37-46   2017   [Refereed]
© 2016 Elsevier Ltd.Agriculture intensification through the use of chemical nitrogen fertilizers is contributing substantially to the tremendous increases in global food production. However, eutrophication of downstream waters associated with exce...
Yaegashi Y, Yoshioka H, Unami K, Fujihara M
International Journal of Modeling, Simulation, and Scientific Computing   8(2) 1750039   2017   [Refereed]
Yaegashi Y, Yoshioka H, Unami K, Fujihara M
Journal of Rainwater Catchment Systems   23(1) 13-18   Jul 2017   [Refereed]
Sharifi E, Unami K, Yangyuoru M, Fujihara M
Stochastic Environmental Research and Risk Assessment   30(5) 1503-1514   May 2016   [Refereed]
© 2015, Springer-Verlag Berlin Heidelberg.It may be paradoxical but subsistence rainfed agriculture is the predominant source of food in Sub-Saharan Africa where the production uncertainty is associated with the stochastic nature of rainfall. This...
Nakamichi T, Unami K, Fujihara M
Jurnal Teknologi   78 15-20   Jan 2016   [Refereed]
© 2016 Penerbit UTM PressUse of fishing weirs can be seen throughout the world to trap migratory fish in rivers. In rivers flowing into Lake Biwa, Shiga prefecture, Japan, a peculiar type of traditional fishing weir has been operated, targeting an...
Mabaya G, Unami K, Yoshioka H, Takeuchi J, Fujihara M
Paddy and Water Environment   14 247-258   Jan 2016   [Refereed]
© 2015, The International Society of Paddy and Water Environment Engineering and Springer Japan.We investigated seasonal water quality changes on different land uses in a small agricultural watershed dominated with rice and tea crops. Observed NO3...
Yoshioka H, Yaegashi Y, Unami K, Fujihara M
Communications in Computer and Information Science   645 190-200   2016   [Refereed]
Yaegashi Y, Yoshioka H, Unami K, Fujihara M
Communications in Computer and Information Science   603 91-101   2016   [Refereed]
Yoshioka H, Unami K, Fujihara M
Theoretical and Applied Mechanics Japan   63 117-126   Jan 2015   [Refereed]
© 2015, Science Council of Japan. All rights reserved.Advection-dispersion phenomena in 1-D open channels are described with a diffusion process mode! governing Lagrangian particle dynamics. The objective of this paper is to propose a new diffusio...
Unami K, Mohawesh O, Sharifi E, Takeuchi J, Fujihara M
Journal of Cleaner Production   88 185-195   2015   [Refereed]
Yoshioka H, Unami K, Fujihara M
Applied Mathematical Modelling   39(1) 205-229   2015   [Refereed]
Yoshioka H, Unami K, Fujihara M
Journal of Advanced Simulation in Science and Engineering   2(2) 271-291   2015   [Refereed]
Yaegashi Y, Yoshioka H, Unami K, Fujihara M
Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   71(2) I_223-I_234   2015   [Refereed]
Yoshioka H, Unami K, Fujihara M
Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   71(2) I_149-I_160   2015   [Refereed]
1-D shallow water models for dam break flash floods with different junction and bend treatments
Yoshioka H, Unami K, Fujihara M
Communications in Computer and Information Science   474 201-215   2014   [Refereed]
Journal of Japan Society of Civil Engineers, Ser. A2, Applied Mechanics   70(2) I_265-I_276   2014   [Refereed]
An extended mathematical model for shallow water flows in vegetated open channels
Yoshioka H, Wakazono A, Kinjo N, Unami K, Fujihara M
Journal of Rainwater Catchment Systems   20(1) 29-35   2014   [Refereed]
Temporal discretization algorithms for the continuity equation of the one-dimensional shallow water model
Yoshioka H, Unami K, Fujihara M
Journal of Rainwater Catchment Systems   20(1) 11-18   2014   [Refereed]
Yoshioka H, Unami K, Fujihara M
Journal of Japan Society of Civil Engineers, Ser. B1, Hydraulic Engineering   70(4) I_55-I_66   2014   [Refereed]
Yoshioka H, Unami K, Fujihara M
Theoretical and Applied Mechanics Japan   62(0) 131-140   2014   [Refereed]
Flash flooding due to a dam failure brings about catastrophic consequences involving destruction of buildings and loss of human lives. Numerical models based on the 1-D shallow water equations serve as essential tools for effective flood risk anal...
Application of two shallow water models to steady flow analysis in a vegetated agricultural drainage canal
Yoshioka H, Kinjo N, Wakazono A, Unami K, Fujihara M
Journal of Rainwater Catchment Systems   19(2) 35-41   2014   [Refereed]
Comparative numerical analysis on momentum flux evaluation schemes for shallow water flows in open channel networks
Yoshioka H, Unami K, Fujihara M
Journal of Rainwater Catchment Systems   19(2) 25-33   2014   [Refereed]
Internal boundary conditions for solute transport equations in locally one-dimensional open channel networks
Yoshioka H, Unami K, Fujihara M
Journal of Rainwater Catchment Systems   19(2) 1-9   2014   [Refereed]
H. Yoshioka; K. Unami; M. Fujihara
International Journal for Numerical Methods in Fluids   75(1) 23-41   2014   [Refereed]
YOSHIOKA Hidekazu, KINJO Nobuhiko, UNAMI Koichi, FUJIHARA Masayuki
Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   69(2) I_59-I_70   2013
Numerical resolution of advection-diffusion equations on connected graphs requires careful treatment in implementing internal boundary conditions at junctions. This study proposes a simple conforming Petrov-Galerkin finite element method with comp...
H. Yoshioka; K. Unami
Probabilistic Engineering Mechanics   31 30-38   2013   [Refereed]
K. Unami; M. Yangyuoru; A.H.M. Badiul Alam; G. Kranjac-Berisavljevic
Stochastic Environmental Research and Risk Assessment   27(1) 77-89   2013   [Refereed]
Ishida K, Unami K, Kawachi T
雨水資源化システム学会誌   17(2) 15-23   Jan 2012   [Refereed]
Ishida Kei, Unami Koichi, Kawachi Toshihiko
Journal of Rainwater Catchment Systems   17(2) 15-23   2012
Understanding water flows in open channels is of great importance in agricultural engineering because water is necessary for farming. Although water flow is fundamentally a three-dimensional (3D) phenomenon, one-dimensional (ID) models are frequen...
K. Unami; M. Yangyuoru; A.H.M.B. Alam
Stochastic Environmental Research and Risk Assessment   26(1) 115-126   2012   [Refereed]
H. Yoshioka; K. Unami; T. Kawachi
Applied Mathematical Modelling   36(4) 1796-1805   2012   [Refereed]
K. Unami; A.H.M.B. Alam
International Journal for Numerical Methods in Fluids   69(2) 255-272   2012   [Refereed]
S. Maeda; T. Kawachi; K. Unami; J. Takeuchi
Watersheds: Management, Restoration and Environmental Impact   359-392   2011   [Refereed]
K. Ishida; M. Yangyuoru; K. Unami; T. Kawachi
Paddy and Water Environment   9(4) 393-401   2011   [Refereed]
K. Unami; F.K. Abagale; M. Yangyuoru; A.H.M. Badiul Alam; G. Kranjac-Berisavljevic
Stochastic Environmental Research and Risk Assessment   24(5) 725-733   Jul 2010   [Refereed]
TAKEUCHI Junichiro, IMAGAWA Chie, KAWACHI Toshihiko, UNAMI Koichi, MAEDA Shigeya, IZUMI Tomoki
Paddy Water Environ.   8(2) 175-187   Jun 2010
TAKEUCHI Junichiro, KAWACHI Toshihiko, IMAGAWA Chie, BUMA Natsuki, UNAMI Koichi, MAEDA Shigeya
Paddy and Water Environment   8(2) 145-156   Jun 2010
UNAMI Koichi, ISHIDA Kei, KAWACHI Toshihiko, MAEDA Shigeya, TAKEUCHI Junichiro
Paddy and water environment : journal of the international society of paddy and water environment engineering   8(2) 105-111   Jun 2010
J. Takeuchi; C. Imagawa; T. Kawachi; K. Unami; S. Maeda; T. Izumi
Paddy and Water Environment   8(2) 175-187   Jun 2010   [Refereed]
J. Takeuchi; T. Kawachi; C. Imagawa; N. Buma; K. Unami; S. Maeda
Paddy and Water Environment   8(2) 145-156   Jun 2010   [Refereed]
K. Unami; K. Ishida; T. Kawachi; S. Maeda; J. Takeuchi
Paddy and Water Environment   8(2) 105-111   Jun 2010   [Refereed]
Maeda Shigeya, Kawachi Toshihiko, Unami Koichi, Takeuchi Junichiro, Ichion Eiji
Journal of Hydro-environment Research   4(1) 27-36   Apr 2010
A stochastic multiobjective programming model, an var epsilon-RO (Epsilon Robust Optimization) model as a simulation–optimization model with an embedding approach, is developed for river water quality management under hydro-environmental uncertain...
S. Maeda; T. Kawachi; K. Unami; J. Takeuchi; E. Ichion
Journal of Hydro-Environment Research   4(1) 27-36   Apr 2010   [Refereed]

Misc

 
UNAMI Koichi
水土の知 : 農業農村工学会誌 : journal of the Japanese Society of Irrigation, Drainage and Rural Engineering   76(4)    Apr 2008

Books etc

 
Modelling and analysis of time series data in math-agro sciences
UNAMI Koichi (Part:Editor, The Mathematics for Industry Research)
Institute of Mathematics for Industry, Kyushu University   Mar 2019   
A prototype of micro irrigation scheme in the Jordan Rift Valley and its mathematical modelling
UNAMI Koichi (Part:Contributor, International Green Capitals Congress)
Konya Municipality   May 2018   
Optimization approaches to nonpoint pollutant source control in watersheds
Unami K, Kawachi T, Maeda S, Takeuchi J
Chapter 4 In: Watersheds: Management, Restoration and Environmental Impact, Edited by Vaughn JC, Nova Science Publishers, 359-391   2011   
Computational methods supporting rainwater harvesting technology
Unami K, Kawachi T, Maeda S, Takeuchi J
Chapter 4 In: New Topics in Water Resources Research and Management, Edited by Andreassen HM, Nova Science Publishers, 167-193   2008   
Management of water quality environment under uncertainty -mathematical modeling and computational optimization-
Kawachi T, Unami K, Maeda S, Takeuchi J
Environmental Pollution, Edited by Singh VP and Yadava RN, Applied Publishers, 381-392   2003   
Robust servo control of open channel network flows
Unami K, Kawachi T, Okumura H, Nakanishi S
Computational Methods and Experimental Measurements IX, Edited by Brebbia CA and Caromagno GM, WIT Press, 241-248   1999   
Numerical model of pseudo steady flows in saline open channel networks using finite volume and finite element methods
Unami K, Kawachi T, Hiramatsu K, Okumura H
Finite Volumes for Complex Applications, Edited by Benkhaldoun F and Vilsmeier R, Hermes, 563-570   1996   
Adjoint problem of unsteady open channel flows
Unami K, Kawachi T, Yangyuoru M
Computer Methods and Water Resources III, Edited by Abousleiman Y, Brebbia CA, Ouazar D, and Cheng AH, WIT Press, 41-48   1996   

Conference Activities & Talks

 
YAEGASHI Yuta, YOSHIOKA Hidekazu, UNAMI Koichi, FUJIHARA Masayuki
計算工学講演会論文集(CD-ROM)   6 Jun 2018   
A prototype of micro irrigation scheme in the Jordan Rift Valley and its mathematical modelling [Invited]
Unami K, Mohawesh O
International Green Capitals Congress   May 2018   
大石真悠子, 藤原正幸, 宇波耕一, 竹内潤一郎
農業農村工学会京都支部研究発表会講演要旨集   2018   
八重樫優太, 八重樫優太, 吉岡秀和, 宇波耕一, 藤原正幸
農業農村工学会大会講演会講演要旨集(CD-ROM)   2018   
藤倉大和, 宇波耕一, 藤原正幸, 岡本久
日本雨水資源化システム学会研究発表会講演要旨集   2018   
新井芽丹, 宇波耕一, 藤原正幸
日本雨水資源化システム学会研究発表会講演要旨集   2018   
YAEGASHI Yuta, YAEGASHI Yuta, YOSHIOKA Hidekazu, UNAMI Koichi, FUJIHARA Masayuki
日本雨水資源化システム学会研究発表会講演要旨集   2018   
Robust optimal harvesting policy for fish in a pond with price volatility
Ndede EO, Unami K, Fujihara M
Dec 2017   
Lipschitz continuity of value functions solving a dynamic programming problem for a water storage tank
Unami K, Mohawesh O, Fujikura Y, Fujihara M
Dec 2017   
柳井康太郎, 宇波耕一, ALAM Abul Hasan Md Badiul, 藤原正幸
日本雨水資源化システム学会研究発表会講演要旨集   Nov 2017   
Stability of water quality dynamics in artificial shallow water bodies [Invited]
Alam AHMB, Unami K, Fujihara M
12th Conference on Sustainable Development of Energy, Water and Environment Systems   Oct 2017   
The viscosity solution to an HJB equation governing the optimal release strategy from Bukit Merah Reservoir, Malaysia [Invited]
Unami K, Fadhil R, Kamal R, Mohawesh O
12th Conference on Sustainable Development of Energy, Water and Environment Systems   Oct 2017   
藤倉大和, 宇波耕一, 藤原正幸
農業農村工学会大会講演会講演要旨集(CD-ROM)   8 Aug 2017   
八重樫優太, 吉岡秀和, 宇波耕一, 藤原正幸
計算工学講演会論文集(CD-ROM)   31 May 2017   
Stochastic control of fishery resources using dynamical models for local behaviour and global population
Yoshioka H, Yaegashi Y, Unami K, Fujihara M
RIMS Kôkyûroku   May 2017   
八重樫優太, 八重樫優太, 吉岡秀和, 宇波耕一, 藤原正幸
農業農村工学会京都支部研究発表会講演要旨集   2017   
YAEGASHI Yuta, YAEGASHI Yuta, YOSHIOKA Hidekazu, UNAMI Koichi, FUJIHARA Masayuki
International Conference on Simulation Technology (CD-ROM)   2017   
YAEGASHI Yuta, YAEGASHI Yuta, YOSHIOKA Hidekazu, UNAMI Koichi, FUJIHARA Masayuki
日本雨水資源化システム学会研究発表会講演要旨集   2017   
Precise fertigation using multiply-connected drip tube networks
Bashiri H, Unno Y, Sharifi E, Unami K, Fujihara M
International Water Conference 2016: Water Resource in Arid Areas: The Way Forward   Mar 2016   
Operational rules for micro-dams solving stochastic control problems
Sharifi E, Unami K, Mohawesh O, Fujihara M
International Water Conference 2016: Water Resource in Arid Areas: The Way Forward   2016   
横田康平, 藤原正幸, 宇波耕一, 竹内潤一郎, 竹門康弘
農業農村工学会京都支部研究発表会講演要旨集   2016   
八重樫優太, 宇波耕一, 藤原正幸, 吉岡秀和
農業農村工学会京都支部研究発表会講演要旨集   2016   
Yoshioka Hidekazu, Takagi Kenji, Unami Koichi, Fujihara Masayuki
RIMS Kokyuroku   Jun 2015   
Yoshioka Hidekazu, Unami Koichi, Fujihara Masayuki
計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science   Jun 2015   
Numerical simulation on optimal countermeasure for feeding damage by Great Cormorant to inland fisheries based on stochastic control theory
Yaegashi Y, Yoshioka H, Unami K, Fujihara M
Proceeding of Asia Simulation Conference 2015   2015   
Design and construction of a hydraulic structure for rainwater harvesting in arid environment
Sharifi E, Unami K, Mohawesh O, Nakamichi T, Kinjo N, Fujihara M
E-proceedings of the 36th IAHR (International Association for Hydro-environment Engineering and Research) Congress   2015   
Markov decision process to find optimal policies for control of nitrogen pollutant loads in reservoirs for irrigation
Mabaya G, Unami K, Fujihara M
Proceedings of the 10th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES)   2015   
Optimal management strategies for rural water resources from a viewpoint of stochastic control
Unami K, Fujiahra M, Yoshioka H
RIMS Kôkyûroku   2015   
Application of a regime-switching diffusion process model to transport phenomena in surface water bodies
Yoshioka H, Takagi K, Unami K, Fujihara M
RIMS Kôkyûroku   2015   
Sharifi E, Unami K, Fujihara M
Vulnerability, Uncertainty, and Risk: Quantification, Mitigation, and Management - Proceedings of the 2nd International Conference on Vulnerability and Risk Analysis and Management, ICVRAM 2014 and the 6th International Symposium on Uncertainty Modeling a   1 Jan 2014   
© 2014 American Society of Civil Engineers.Irregular occurrence of dry spells in cropping rainy seasons leads to the vulnerability of subsistence rainfed agriculture. A fundamental concept is presented in this paper to comprehend alternation of dr...
Robust optimal policy for diversion of agricultural drainage water from tea plantations to paddy fields
Mabaya G, Unami K, Yoshioka H, Takeuchi J, Fujihara M
Proceedings of the 9thConference on Sustainable Development of Energy, Water and Environment Systems (SDEWES)   2014   
A hyperbolic longitudinal dispersion model of contaminant in open channel networks
Yoshioka H, Kinjo N, Mabaya G, Unami K, Fujihara M
Proceedings of the 7th International Symposium on Environmental Hydraulics   2014   
Yoshioka Hidekazu, Unami Koichi, Fujihara Masayuki
NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan   2014   
Advection-dispersion phenomena in one-dimensional open channels are described with the diffusion process model and its associated Kolmogorov’s equations governing the microscopic Lagrangian particle dynamics. The main purpose of this researc...
Yoshioka Hidekazu, Unami Koichi, Fujihara Masayuki
NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan   2013   
Flash flooding due to a dam failure seriously affects downstream area. Numerical models using the one-dimensional shallow water equations have served as an efficient tool for flood risk analysis. However, conventional models have difficulties to h...
Partial differential equation model for spatially distributed statistics of contaminant particles in locally one-dimensional open channel networks
Yoshioka H, Unami K, Kawachi T
The 10th International Conference on Hydroscience and Engineering   2012   
Optimal strategies for water pumping from shallow aquifer in Bangladeshi floodplain
Kuwano R, Alam AHMB, Unami K, Fujihara M
平成24年度応用水理研究部会講演会   2012   
A stochastic population dynamics model for sustainability assessment in two adjacent habitats
Mibuta Y, Unami K, Fujihara M
平成24年度応用水理研究部会講演会   2012   
An autonomous runoff model using stochastic differential equations
Alam AHMB, Ryo M, Unami K, Fujihara M
平成24年度応用水理研究部会講演会   2012   
Stochastic control of micro rainwater harvesting systems
Ryo M, Unami K, Fujihara M
平成24年度応用水理研究部会講演会   2012   
An upwind finite element scheme for stochastic contaminant particle dynamics in locally one-dimensional open channel networks
Yoshioka H, Unami K, Kawachi T
PAWEES 2011 Students' International Conference   2011   
Key Issues in Management of Existing Micro-Dams in Ghana
Abagale FK・宇波耕一・河地利彦
雨水資源化システム学会第17回研究発表会   2009   
Application of shallow water equations models for water hazards problems
The International Conference on Water, Environment, Energy and Society/WEES-2009   2009   National Institute of Hydrology, Roorkee/Ministry of Water Resources, India
K. Unami; T. Kawachi; M. Yangyuoru; K. Ishida
Proceedings of the Second IASTED International Conference on Advanced Technology in the Environmental Field, ATEF 2006   1 Dec 2007   
A finite volume scheme to numerically solve the twodimensional (2D) shallow water equations with source terms is presented. Innovative methods are developed for data reconstruction, flux splitting, evaluation of numerical fluxes, and treatment of ...
A prototype tank irrigation scheme with rainwater harvesting
Yangyuoru M, Unami K, Kawachi T
International Conference on Rainwater Harvesting and Management in Africa, 81-88   2006   
Optimal water management in small-scale tank irrigation systems
Unami K, Kawachi T, Yangyuoru M
Dubrovnik Conference on Sustainable Development of Energy, Water and Environment Systems, Paper 138   2002   
H∞ control approach to sustainable management of water quality in Lake Biwa
Unami K, Kawachi T, Terada S
The 9th International Conference on the Conservation and Management of Lakes, 3C/D-P06, 273-276   2001   
Robust control of irrigation channel network system
Unami K, Kawachi T
Proceedings of International Commission on Irrigation and Drainage/ICID 1st Asian Conference, B02, 1-11   2001   
K. Unami; T. Kawachi; M. Yangyuoru
Proceedings of the International Conference on Computer Methods in Water Resources, CMWR   1 Jan 1996   
A theoretical approach to optimal control problems of unsteady open channel flows is presented in the framework of variational calculus. The adjoint problem that attends an unsteady flow simulation problem characterizes the minimum principles that...
A decision support model for reservoir management using the Fokker-Plank equations
Unami K, Kawachi T, Kawakatsu K, Maruyama T
Proceedings of International Conference on Water Resources and Environment Research: Towards the 21st Century, 2, 191-198   1996   
Simulation of a modeled grouped reservoirs system
Unami K
Proceedings of the 1992 Regional Conference, International Rainwater Catchment Systems Association, 3, 959-969   1992   

Association Memberships

 
 

Research Grants & Projects

 
Optimal Control of Water Resources System
Numerical Modelling in Hydraulics

Patents

 
特許9689131 : Water collecting structure
Akira Taomoto, Yumi Wakita, Junichiro Takeuchi, Koichi Unami, Toshihiko Kawachi