摘要
利用1980~2006年的常规气象资料和土壤水分资料,确定了辽宁省5个气候相似区的作物系数,模拟了土壤水分供应系数动态模型,在水分平衡方程的基础上,建立了辽宁省0~50 cm的农田土壤水分预报模型,同时对其进行了检验。利用NOAA卫星监测得到的农田土壤含水量作为预报的初始值,然后在GIS支持下,采用Kriging插值方法对模型中所需参数的散点数据进行插值得到与预报值匹配的网格数据,然后利用地理信息系统的空间分析功能,依据模拟的农田土壤含水量预报模式,计算了农田土壤含水量预报值的格点数据,实现了农田土壤含水量由点到面的预报。结果表明：模型的预报准确率在85%以上,应用地理信息系统技术预报土壤含水量是可行的。
The routine weather data and the constant observational data of soil moisture for 18 representative stations during 1980-2006 were used in the paper to calculate the crop coefficient and the soil water supplying coefficient,the farmland soil water supply dynamic model of five regions in the Liaoning province with mathematical and statistical method.Based on the theory of the water balance,the soil moisture of the field forecast dynamic model in the Liaoning Province was established in 0-50 cm soil layer.Based on the GIS technology,the NOAA/AVHRR data were used to calculate the forecast value of the soil moisture of the field with the grid data of single data by the Kriging method,then the data were analyzed to verify the accuracy of the model.The result shows that the veracity of the dynamic model is more than 85%,and forecasting the soil moisture of the field using the GIS technology is feasible.
出处
《土壤通报》
CAS
CSCD
北大核心
2010年第5期1043-1047,共5页
Chinese Journal of Soil Science
基金
科技部农业科技成果转化资金项目(05EFN217400412)
中国气象局气象新技术推广项目(CMATG2006M14)资助
关键词
农田土壤含水量
预报模型
GIS
Soil moisture of the field
Forecast dynamic model
Geographical information system（GIS）
