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Irrigation and Water Utilization Lab
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A lab that studies water in paddy and upland fields from both the irrigation and drainage perspectives.
AboutAbout the lab
Studying agricultural water from both irrigation and drainage perspectives
The Irrigation and Water Utilization Lab studies the soil moisture conditions of paddy and upland fields that suit crop growth, from the two perspectives of irrigation and field drainage.
In recent years, the conversion of paddy fields so that they can also be used as upland fields (multipurpose conversion) has advanced, and securing drainage when converting poorly drained paddy fields to upland fields has become a challenge.
To propose ways to make effective use of the large volumes of water resources and biomass used in agriculture, the lab also studies water use and biomass.
The lab belongs to the Bioproduction Environment Engineering field of the School of Agriculture, and investigates water flow and water management in paddy areas through field observation.
Key terms
- Irrigation
- Supplying water to farmland to control soil moisture at the level best suited to crop growth
- Multipurpose conversion (hanyoka)
- Making farmland that was a paddy field usable as an upland field as well
- Repeated use
- The process in which water taken in returns to drainage canals and rivers as drainage, and is used again as irrigation water in paddy areas downstream
NewsLab news
A student won a Poster Award at the Kyushu-Okinawa Branch Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering
A student won an Excellence Award at the Japanese Society of Irrigation, Drainage and Rural Engineering Mini Video Contest "Korya Eizo! 2024"
ResearchResearch themes
The lab researches, from both the irrigation and field drainage perspectives, the knowledge and technologies needed to secure field moisture conditions suited to paddy and upland farming. Through field observation, surveys, and analysis, it also investigates the amount and temperature of water used in agriculture, as well as the multifunctional roles of agriculture.
*Illustrative imageChanges in Agriculture and Irrigation Water Supply and Demand
Changes in the crops grown or in the timing of cultivation could greatly alter regional irrigation water demand. The lab examines these impacts through field observation and hydrological analysis, and aims to consider how irrigation water should be supplied to suit future agricultural systems.
*Illustrative imageModeling Water Temperature Changes in Paddy Areas
Water temperature strongly affects agricultural production and the habitat of aquatic organisms. Paddy areas are influenced by farmers' water management, and knowledge of how water temperature changes there is insufficient. The lab aims to clarify the structure of these changes through field observation and to build models of them.
*Illustrative imageWater Movement and Water Management in Paddy Areas
In paddy fields, much of the water taken in returns to rivers as drainage and is used again as irrigation water downstream (repeated use). The lab clarifies water dynamics and actual water management practices through field observation, and studies efficient and sustainable agricultural water use.
*Illustrative imageDeveloping and Managing Agricultural Data
While agricultural automation and ICT adoption are advancing at the farm level, information on regional production infrastructure such as irrigation canals and farm roads remains insufficiently developed. The lab assesses the current state of agricultural data and examines the challenges of developing and managing it, as well as future directions.
MembersFaculty
The members of the Irrigation and Water Utilization Lab are faculty, students in the doctoral, master's, and undergraduate programs, and research students.As of 2026
- ProfessorYukiyoshi Iwata
- Assistant ProfessorTomoyuki Taniguchi
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “0399Views of Talampas irrigation canals Paddy fields 07” JFVelasquez Floro / CC0 (cropped)
- Changes in Agriculture and Irrigation Water Supply and Demand: “Narayanpur Right Bank Canal headworks intake Krishna River Karnataka India” Vraj Acharya, WELL Labs / CC BY-SA 4.0 (cropped)
- Modeling Water Temperature Changes in Paddy Areas: “Colorful sky with pink and blue clouds reflecting in the water of a paddy field at dusk in Don Det Laos” Basile Morin / CC BY-SA 4.0 (cropped)
- Water Movement and Water Management in Paddy Areas: “Rice fields water canal in Bohol” Øyvind Holmstad / CC BY-SA 4.0 (cropped)
- Developing and Managing Agricultural Data: “LPMDL-110X IoT data logger” Niau33 / CC BY-SA 4.0 (cropped)
- Related lab (Agricultural Production Ecology (Farm) Lab): “Central Expmtl Farm Ottawa” P199 / CC BY 2.5 (cropped)
- Related lab (Nutrition Chemistry Lab): “Healthy Food - Colourful Fruit and Veg” formulatehealth / CC BY 2.0 (cropped)
- Related lab (Plant Nutritional Physiology Lab): “Brassica oleracea italica, Sault Ste Marie 1” Fungus Guy / CC BY-SA 3.0 (cropped)
- Related lab (Wood Resource Science Lab): “Live leaf cells of the moss plant. మాస్ మొక్క పత్రం లోని హరిత రేణువుల తో కూడిన కణాలు” Krishna satya 333 / CC BY-SA 4.0 (cropped)
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