Search Results - "Unami, Koichi"

A multi-state Markov chain model to assess drought risks in rainfed agriculture: a case study in the Nineveh Plains of Northern Iraq by Fadhil, Rasha M., Unami, Koichi

“…The occurrence of prolonged dry spells and the shortage of precipitation are two different hazardous factors affecting rainfed agriculture. This study…”
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A singular stochastic control model for sustainable population management of the fish-eating waterfowl Phalacrocorax carbo by Yaegashi, Yuta, Yoshioka, Hidekazu, Unami, Koichi, Fujihara, Masayuki

“…Using a tractable singular stochastic control model, this study seeks a sustainable population management policy for the fish-eating waterfowl Phalacrocorax…”
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Stochastic optimal control of agrochemical pollutant loads in reservoirs for irrigation by Mabaya, Goden, Unami, Koichi, Fujihara, Masayuki

“…Agriculture intensification through the use of chemical nitrogen fertilizers is contributing substantially to the tremendous increases in global food…”
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Time periodic optimal policy for operation of a water storage tank using the dynamic programming approach by Unami, Koichi, Mohawesh, Osama, Fadhil, Rasha M.

“…Operation of a water storage tank in a specific environment motivates mathematical studies on a discrete-time deterministic dynamic programming problem. The…”
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Shading solutions for sustainable water management: impact of colors and intensities on evaporation and water quality by Zeadeh, Doha, Albalasmeh, Ammar, Mohawesh, Osama, Unami, Koichi

“…This study investigated the effectiveness of suspended shade covers in reducing evaporation rates and improving evaporation suppression efficiency. The…”
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Holistic water quality dynamics in rural artificial shallow water bodies by Alam, Abul Hasan Md Badiul, Unami, Koichi, Fujihara, Masayuki

“…The water environment in diversely used rural artificial water bodies is generally varied with seasonal and diurnal changes, stability of which is significant…”
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A finite element/volume method model of the depth-averaged horizontally 2D shallow water equations by Yoshioka, Hidekazu, Unami, Koichi, Fujihara, Masayuki

“…SUMMARYAnalysis of surface water flows is of central importance in understanding and predicting a wide range of water engineering issues. Dynamics of surface…”
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Verifying optimality of rainfed agriculture using a stochastic model for drought occurrence by Sharifi, Erfaneh, Unami, Koichi, Yangyuoru, Macarius, Fujihara, Masayuki

“…It may be paradoxical but subsistence rainfed agriculture is the predominant source of food in Sub-Saharan Africa where the production uncertainty is…”
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Rainfall-Runoff Models with Fractional Derivatives Applied to Kurau River Basin, Perak, Malaysia by Unami, Koichi, Fadhil, Rasha M, Kamal, Md Rowshon

“…Kurau River Basin (KRB), which covers an area of 322 km2 and is the main drainage artery pouring into Bukit Merah Reservoir (BMR), is located in Perak State of…”
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Robust optimal diversion of agricultural drainage water from tea plantations to paddy fields during rice growing seasons and non-rice growing seasons by Mabaya, Goden, Unami, Koichi, Yoshioka, Hidekazu, Takeuchi, Junichiro, Fujihara, Masayuki

“…We investigated seasonal water quality changes on different land uses in a small agricultural watershed dominated with rice and tea crops. Observed NO 3 –N in…”
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Stochastic process model for solute transport and the associated transport equation by Yoshioka, Hidekazu, Unami, Koichi, Kawachi, Toshihiko

“…A mathematical model of Lagrangian motions of a particle in turbulent flows is developed on the basis of a stochastic differential equation. The model…”
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Stochastic control of a micro-dam irrigation scheme for dry season farming by Unami, Koichi, Yangyuoru, Macarius, Badiul Alam, Abul Hasan Md, Kranjac-Berisavljevic, Gordana

“…Micro-dams are expected to be feasible options for water resources development in semi-arid regions such as the Guinea savanna agro-ecological zone of West…”
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A stochastic differential equation model for assessing drought and flood risks by Unami, Koichi, Abagale, Felix Kofi, Yangyuoru, Macarius, Badiul Alam, Abul Hasan M., Kranjac-Berisavljevic, Gordana

“…Droughts and floods are two opposite but related hydrological events. They both lie at the extremes of rainfall intensity when the period of that intensity is…”
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Application of shallow water equations to analyze runoff processes in hilly farmlands by Ishida, Kei, Yangyuoru, Macarius, Unami, Koichi, Kawachi, Toshihiko

“…Analysis of runoff processes in farmlands during storm events in particular is an important engineering topic. The shallow water equations describing the…”
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Resource budget model with Duffing oscillator for dynamics of synchronized biennial-bearing olives in the Levant by Magero, Eileen Joan, Unami, Koichi, Mohawesh, Osama, Sato, Marie

“…•Synchronized biennial-bearing prevails olives in the Levant.•A nonlinear dynamical model is developed to explain the phenomena.•Coupling individual fruit…”
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Robust optimization of shading types to control the performance of water reservoirs by Albalasmeh, Ammar, Mohawesh, Osama, Zeadeh, Doha, Unami, Koichi

“…Managing evaporation losses and water quality is critical in improving farm-level water reservoir performance. Applying shading cloths over water reservoirs…”
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A physically based FVM watershed model fully coupling surface and subsurface water flows by Takeuchi, Junichiro, Kawachi, Toshihiko, Imagawa, Chie, Buma, Natsuki, Unami, Koichi, Maeda, Shigeya

“…A sophisticated modeling approach for simulating-coupled surface and subsurface flows in a watershed is presented. The watershed model developed is a spatially…”
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Fuzzy optimization model for integrated management of total nitrogen loads from distributed point and nonpoint sources in watershed by Maeda, Shigeya, Kawachi, Toshihiko, Unami, Koichi, Takeuchi, Junichiro, Izumi, Tomoki, Chono, Syunsuke

“…A fuzzy optimization model is developed to allocate allowable total nitrogen (T-N) loads to distributed nonpoint sources (NPSs) and point sources (PSs) in a…”
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Systematic assessment of flood mitigation in a tank irrigated paddy fields area by Unami, Koichi, Kawachi, Toshihiko

“…Flood mitigation in irrigation tanks and paddy fields is their favorable aspect though its practical effect is not known very well. A dynamic and systematic…”
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The Potential of Biochar Application to Enhance Soil Quality, Yield, and Growth of Wheat and Barley Under Rainfed Conditions by Albalasmeh, Ammar, Mohawesh, Osama, Alqudah, Ahmad, Unami, Koichi, Al-Ajlouni, Zakaria, Klaib, Amani

“…Biochar (BC) is a carbon-rich product obtained by heating biomass in a closed system with a finite amount of oxygen. BC has gained significant attention in…”
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