Smart paddy water management based on simulation of ponded water and soil temperature variation in paddy fields

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H02309
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 41030:Rural environmental engineering and planning-related
• Research Institution: Kindai University
• Principal Investigator: KIMURA Masaomi 近畿大学, 農学部, 准教授 (80725664)
• Co-Investigator(Kenkyū-buntansha): 松野 裕 近畿大学, 農学部, 教授 (50340766) ; 皆川 裕樹 国立研究開発法人農業・食品産業技術総合研究機構, 農村工学研究部門, 上級研究員 (70527019)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: スマート農業 / 田面水温 / 水田用IoT水門 / 高温障害対策 / 機械学習

Outline of Final Research Achievements

In this study, we clarified the characteristics of temperature environment changes, such as surface water temperature and soil temperature distribution, through field measurements in a paddy field equipped with a remotely operated sluice gate (IoT sluice gate). Subsequently, we developed a vertical heat balance model for the rice paddies. This model considers heat transfer between the atmosphere, vegetation community, ponded water, and the ground, and was enhanced by incorporating a deep learning method. Furthermore, we constructed a simulation model of water and soil temperature distribution that accounts for the flow field of rice field water. This was achieved by integrating it with a two-dimensional numerical model of paddy water flow.

Free Research Field

水利環境工学

Academic Significance and Societal Importance of the Research Achievements

本研究により開発された田面水の流れ場を考慮した水温・地温分布シミュレーションモデルにより、水温・地温分布の予測結果を考慮したIoT水門の開閉操作アルゴリズムの提案が可能となり、水稲の品質向上に向けたスマート水田水管理への展開が期待される。また、本シミュレーションモデルを応用することで、スマート水田水管理技術による水田内の温度調節機能のポテンシャルの評価が可能となった。