Observation and simulation of thermal environment in a paddy field
Observation and simulation of thermal environment in a paddy field
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稻田热环境观测与模拟
DOI：
10.1007/s10333-004-0047-2
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发表时间：
2004
影响因子：
2.2
通讯作者：
Tomokazu Haraguchi
中科院分区：
文献类型：
--
作者：
S. K. Saptomo;Y. Nakano;K. Yuge;Tomokazu Haraguchi
本研究以田间有水条件下稻田热环境评价为主要目的，通过观测和模拟相结合的方法，对稻田热环境进行了研究。采用两层阻力模型计算了土壤与水、植物与大气的热交换。大气边界层的热，湿度和风速假设水平均匀，并安排在一维方程。观察的稻田位于日本福冈的九州大学实验农场。模拟中，采用风速、湿度固定边界条件和100 m高度温度波动边界条件，在水层深度为5 cm的稻田上空进行。模拟成功地估算了辐射、热通量耗散、大气热变化机制以及叶片、空气和水的温度。结果表明，大部分的有效能量耗散为潜热，而较少的能量耗散为感热。
This research studied thermal environment in paddy field which the main objective to evaluate it when the water was present in the field by means of observation and simulation. Heat exchange in soil and water, plant and atmosphere were calculated using a two-layer resistance model. The atmospheric boundary layers-thermal, humidity and wind velocity-were assumed horizontally uniform and were arranged in one-dimensional equations. The observed paddy field was located at Kyushu University Experimental Farm in Fukuoka, Japan. In the simulation, fix boundary conditions of wind velocity and humidity, and fluctuating boundary condition of temperature at 100 m height were used over the paddy field with the presence of 5 cm depth of water layer. The simulation was successful in estimating radiation, dissipation of heat fluxes, mechanism of atmospheric thermal changes and the temperature of leaf, air, and water. The results show that most of the available energy dissipates into latent heat, and less into sensible heat.