土壤水分自动观测站资料评估方法

Evaluation Method of Data from Soil Moisture Automatic Observation Station

土壤湿度是控制陆地和大气间水分和能量交换过程的重要变量,而土壤水分自动观测站探测是获取土壤湿度的主要手段。自动观测站探测资料的准确性能够直接影响其应用效果,因此,开展土壤水分自动观测站探测资料评估具有重要意义。基于2015—2016年山东省129个自动观测站土壤湿度数据,采用降水下渗法、上下数据对比等方法,研制成山东省自动观测站资料评估方案,进行了质量评估,并提出整改措施。结果表明:山东省土壤水分自动观测站多数台站存在土壤水文物理特性测定值不准确,土壤水分传感器不稳定、出现故障,个别观测站采集器有问题。

Soil moisture is an important variable to control water and energy exchange between land andatmosphere, while soil moisture automatic observation stations＇ observation is the main mean to obtain soilmoisture data. The accuracy of the data gained by automatic observation stations can directly affect itsapplication effect, so it is of great significance to carry out the data evaluation for soil moisture automaticobservation stations. Based on the soil moisture data of 129 automatic observation stations in ShandongProvince of 2015-2016, we used the methods of precipitation infiltration, upper and lower data comparison andso on, developed the data evaluation program for the automatic observation stations in Shandong Province, andproposed the rectification measures upon the quality evaluation of the program. The results showed that most ofthe soil moisture automatic observation stations in Shandong Province had the problems of inaccuratemeasurement data for soil hydrological-physical characteristics, and unstable or breakdown soil moisturesensor, and very few observation stations have the problems with collectors.