井灌水稻区晒水池升温机理的初步研究

The preliminary study on water temperature increasing at sunning water pool in well irrigation rice district

针对井灌区井水灌溉水温低的特点 ,为防止井灌水稻冷水害的发生 ,通过太阳辐射 -水体 -土壤这一连续体模型 ,利用数学知识解微分方程的方法 ,建立了静水情况下晒水池平衡水温的数学模型 ,并结合实例说明了各参数的数值算法 ;建立了晒水池内任意时刻各点水温的预测模型 ,并利用实测水温加以验证 ,其最大相对误差在9.6 %以内 ,预测精度符合要求。

Oriented towards the characteristic of the low temperature well water for rice irrigation in well irrigation district,the sunning water pool is usually set up to increase the water temperature,and prevent cold water harm of well irrigation rice from taking place in field production process.According to the continuation model of solar radiation-water-soil and the method of solving differential equation,the increasing temperature mechanism is researched under the static water circumstances in sunning water pool,meanwhile,the balanced water temperature mathematics model is built up under the static water surroundings.The paper brings forward the calculation method for parameters in sunning water pool under the calm water surroundings.The model for forecasting the increasing water temperature is built up in sunning water pool under dynamic state water circumstances and it is tested and verified by actually surveyed water temperature,the result of which is conformed finely to actually surveyed data,the biggest calculate relative error is only 9.6 percent.