人工与自动土壤水分平行观测资料对比分析

Comparative Analysis of Conventional and AWS Soil Moisture Observations

采用对比差值、差值概率和相关分析等方法对南城2005年9月8日至2007年1月28日期间HYA-SF型土壤水分自动监测站与人工平行对比观测的土壤湿度资料进行统计和一致性分析。结果表明,人工与自动观测资料的一致性在40 cm、50 cm土层表现最好,在5 cm、10 cm土层表现相对最差;总体上自动观测值高于人工观测值,二者数据差异在少雨或干旱季节常小于多雨季节;对比观测时段内人工与自动观测数据序列的相关性在各层均表现为显著,多项式回归趋势基本能反应土壤含水量的变化趋势。分析结果可为评估HYA-SF型土壤水分自动站的监测能力提供客观依据。

The differences are compared and analyzed between soil relative humidity measurements from HYA-SF AWS（Automatic Weather Station） and conventional observation at Nancheng Station from 8 September 2005 to 28 January 2007 by means of the difference probability and correlation analysis methods.The results show that data consistency is best at 40 cm and 50 cm,and worst at 5 cm and 10 cm;automatic humidity values are higher than manual ones as the whole,and differences in rainless periods or dry season are often less than those in rainy periods,but there is still significant correlation between them in all layers.The results can provide an objective basis for evaluating the monitoring capability of HYA-SF automatic stations.