土壤水分自动观测数据分析与订正

Analysis and Correction of Soil Moisture Automatic Observation Data

对山东莱阳气象局近3年获得的自动土壤水分观测数据(简称器测数据)和人工观测土壤湿度数据(简称人工数据)进行对比分析。运用逐步回归分析建立了以器测数据为因子的订正方程,并进行效果验证。结果表明,各层土壤湿度经订正后误差明显减小;各种订正方程的订正效果不同;不同的深度层订正效果不同,深层土壤湿度订正后达到满意的效果,上层土壤湿度订正后未获得满意效果。同时,分析了造成偏差的可能原因。

Soil moisture Automatic observation data（referred to the instrumental data）got by Weather Bureau in Laiyang,Shandong in nearly three years and soil moisture artificial observation data（referred to manual data）were compared.Revised equations were established with instrumental data as a factor using stepwise regression analysis.The results showed that the error of soil moisture in each soil level decreased significantly after revisal.The revised results of revised equations were different.The results of soil moisture of deep soil after revisal were satisfactory,and the results of soil moisture of upper soil after revisal weren＇t satisfactory.And the possible reasons for the deviations caused were analyzed.