自动土壤水分站资料质量控制及其相关关系分析

Quality Control of Automatic Soil Moisture Data and Correlation Analysis

以距离自动土壤水分站最近的人工观测地段的历史土壤水分资料为依据,开展对应的自动土壤水分站观测资料的质量控制阈值研究。统计有土壤水分观测任务的各台站近30年10-50 cm深度5个层次人工观测的土壤重量含水率最大、最小值,且分析与本站凋萎湿度和田间持水量的相关性,作为自动土壤水分站所属区域片上的极值,完成区域极值检查规则的定义。通过分析人工站历年极值序列的均方差确定条件阈值范围和安全指标,实现该区域内自动土壤水分站资料的实时质量控制;通过邻近站资料对比、时序检查等自检方法完成人工干预质量控制。

Based on soil moisture data of artificial observation section nearest automatic soil water station,the corresponding soil moisture station data quality control threshold was carried out. The maximum and minimum soil moisture content of 5 levels artificial observation in 10-50 cm depth in recent 30 years of each station were studied,the correlation with wilting moisture and field capacity was analyzed. Through analysis of the mean square deviation of artificial station historical extreme sequence determined the threshold value range and safety indicators,to implement the regional soil water station observation data of automatic quality control.