Estimating the Water Temperature of Paddy Fields under Abnormal Weather Conditions using an Equilibrium Water Temperature Model
Estimating the Water Temperature of Paddy Fields under Abnormal Weather Conditions using an Equilibrium Water Temperature Model
复制标题
利用平衡水温模型估算异常天气条件下稻田的水温
DOI：
10.2480/agrmet.54.247
复制
发表时间：
1998
影响因子：
1.3
通讯作者：
Y. Kurose
中科院分区：
文献类型：
--
作者：
A. Maruyama;K. Ohba;Y. Kurose
建立了一个利用气象观测资料估算稻田日平均水温的简单模型。该模型以作物生长模型和平衡水温模型耦合为基础。利用该模型，仅根据附近气象站观测到的气温、太阳辐射和水蒸汽压三个因素即可估算水田的水温。在暖温带气候条件下，以不同耕作方式的稻田为试验对象，验证了模型的有效性。观测温度和计算温度吻合得很好。这表明，利用该模型可以较好地估算水田水温，而无需对耕作方式进行校正。将该模型应用于正常和异常天气条件下稻田水温的估算。在正常天气条件下，由于水田海拔和栽培年限的差异，水田水温存在区域差异。在异常天气条件下，水温偏离正常值与气温偏离正常值成正比。在凉爽的夏季，气温每降低1.0℃，稻田水温就会降低1.0℃，而在炎热的夏季，气温每升高1.0℃，稻田水温就会升高0.6℃。
A simple model to estimate the daily mean water temperature of paddy fields from observed meteorological data was developed. The model is based on a crop growth model coupled to an equilibrium water temperature model. Using this model, the water temperature of a paddy field can be estimated from only three factors namely, air temperature, solar radiation, and water vapor pressure, observed a nearby weather station. Validity of the model was examined on actual paddy fields of different style of cultivation, under warm temperate climate. There was a good agreement between observed and calculated temperature. This suggests that the water temperature of paddy fields can be estimated well using this model without any correction to adjust for the style of cultivation.The model was applied to estimate the water temperature of paddy fields under normal and abnormal weather conditions. Under normal weather conditions, there were regional differences in water temperature of paddy fields caused by the differences in elevation and cultivation period of paddy fields. Under abnormal weather conditions, the deviation from normal of water temperature was directly proportional to the deviation from normal of air temperature. A 1.0°C decrease in air temperature during a cool summer year corresponded to a 1.0°C decrease in water temperature of paddy fields, whereas a 1.0°C increase in air temperature during a hot summer year corresponded to a 0.6°C increase in water temperature of paddy fields.