基于天气雷达估测降雨数据的节水灌溉系统设计与实现

农业用水在水资源的应用中占有很大比例,为节约农田灌溉用水,以满足农作物生长需求为前提,提出了一种基于天气雷达估测降雨技术的农田灌溉方法。结合概念模型预报技术和交叉相关法,对降雨进行临近预报,利用未来时间的降雨量对农田作物的需水量进行合理补充,并通过检测装置获取土壤含水量,计算出农田需水量,实现对检测区域作物的定量灌溉。系统试运行结果显示,在短时间内,采用天气雷达估测技术预测的结果与地面雨量计观测的降水结果在误差允许的范围内保持一致,验证了方法的准确性。该技术方案将天气雷达估测降雨技术与数据采集技术相结合,利用现代农业科学技术及设备,充分应用了自然降雨资源,在现有的农业技术水平基础上,既满足了农作物自身的生长需求,又避免了过量灌溉等问题,对中国水资源在农田灌溉中的合理应用有着一定的指导意义。

Design and implementation of water saving irrigation system based on weather radar to estimate rainfall data

The agricultural water occupies a great proportion in the application of water resources. To save the irrigation water, crop growth needs as the premise, a kind of irrigation method for rainfall estimation based on weather radar technology is put forward. This method combines conceptual model forecasting technology and cross method for rainfall nowcasting using future time rainfall as reasonable supplement for water requirement of the crop, and the detection device for acquiring soil moisture, the farmland water demand is calculated, and the quantitative detection of crop irrigation area is realized. The trial operation results of this system show that in a short period of time, the weather radar technique for estimating the prediction results and surface rain gauge observations precipitation is consistent within the allowable error, verifying the accuracy of the method. The weather radar rainfall estimation technology and data acquisition technology combined with modern agricultural science and technology and equipment, making full use of the natural resources in the rain, on the basis of the existing agricultural technology level, can meet the growing demand of the crop itself and avoid excessive irrigation and other issues, providing an important guiding significance for rational use of water resources in irrigation in china.