区域土壤水分与人工和自动站观测数据对比分析

利用2020年6月1日至12月31日山东泰安、云南大理和新疆乌兰乌苏3个站点区域土壤水分观测数据,采用相关性分析和差值分析等方法,分别与同期人工观测数据和自动站观测数据进行对比,并对观测结果逐层进行准确性分析。对比分析结果表明：区域土壤水分观测数据普遍大于人工和自动站观测数据,区域土壤水分观测数据与人工和自动站观测数据之间具有较高的相关性,相关系数的最小值均出现在40 cm土层,它们所反映的土壤湿度随时间变化趋势一致;区域观测数据与人工观测数据各土层的平均差均<0.1,与自动站观测数据之间的平均差在40 cm土层相对其他层次较大。以上表明,区域土壤水分自动观测仪对土壤水分的感应观测结果与自动站观测、人工观测的结果趋势基本保持一致。分析结果可为评价区域土壤水分自动观测仪的监测能力、资料的应用价值与服务效益提供参考。

Comparative analysis of regional soil moisture with manual and automatic station observation data

Using the parallel observation data from June 1, 2020 to December 31, 2020, the regional soil moisture observation data of Taian, Shandong, Dali, Yunnan and Wulan Wusu, Xinjiang are compared and evaluated with the manual observation data and automatic station observation data at the corresponding time.using correlation analysis and difference analysis methods to evaluate the accuracy of the observation results layer by layer, The results show that the regional soil moisture observation data are generally higher than the manual and automatic station observation data, and there is a high correlation between the regional station soil moisture observation data and the manual and automatic station observation data. The minimum value of the correlation coefficient between the regional station and the manual observation appears at the 40cm soil level, and the minimum value of the correlation coefficient with the automatic station appears at the 40cm soil level, The results show that the change trend of soil moisture reflected by them is consistent with time; the average difference between the regional station and the artificial layers is less than 0.1, and the difference between the observation data of the automatic station and the observation data of the automatic station is larger than that of other layers at 40cm. The change trend of the difference indicates that the sensing observation of soil moisture and humidity by regional soil moisture instrument is basically the same. The analysis results provide a scientific basis for evaluating the monitoring ability, application value and service benefit of soil moisture observation instrument in regional stations.