摘要
该文针对井灌区井水灌溉水温低的特点 ,生产实际中需设晒水池来提高水温 ,以便防止井灌水稻冷水害的发生。通过太阳辐射——水体——土壤系统 ,对静水状态和动水状态下晒水池升温机理进行了探讨 ,建立了静水情况下晒水池平衡水温的数学模型 ,并说明各参数的数值算法 ;利用平衡水温的数学模型 ,通过解非奇次方程的方法 ,建立了晒水池内任意时刻各点水温的预测模型 ,并利用建三江垦区七星农场的晒水池实测水温加以验证 ,最大相对误差在 9.6 %以内 ,结果表明预测精度符合生产实际要求 ,这一数学模型为井灌区井水升温提供了较为科学的依据。
In order to solve the problems that low temperature well water irrigated rice in well irrigation districts, the sunning water pool was set up to increase the water temperature, and to prevent the emergence of damage caused by cold water in the field production process. According to the model of solar radiation-water-soil system and the approach to solving the differential equation, the mechanism of increasing water temperature in the sunning water pool was researched. The balancing water temperature mathematics model was established in static state. The method was put forward to calculate the parameters in the balancing water temperature formulation in the sunning water pool in static state. The model was built up to forecast the increasing water temperature in dynamic state. It was tested and verified by the surveyed water temperature of Qixing farm in Jiansanjiang cultivated district, the result of which conformed accurately to the surveyed data. The maximum calculated relative error was only 9.6 percent, which suggested that this model provide scientific basis for increasing the water temperature in the sunning water pool in well irrigation rice district.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2003年第5期51-55,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
HI- TECH Research and Development Program ofChina(2 0 0 2 AA6Z32 63)
关键词
井灌
水稻
晒水池
冷水害
平衡水温
太阳辐射
well irrigation
rice
sunning water pool
cold-water damage
balancing water temperature
solar radiation
