常德地区土壤水分自动站数据质量控制的阈值确定

The Threshold Determination for Data Quality Control of Soil Moisture Automatic Stations in Changde Area

统计分析常德地区9个土壤水分自动站关于土壤体积含水量、土壤相对湿度、土壤重量含水率、土壤有效水分贮存量逐小时资料,得到各层土壤水分分布特征。根据9个站点地理环境以及四要素分布、变化特点,针对作物地段和固定地段两种不同自动站,分汛期和非汛期两时段得到适合当地条件的各层土壤水分阈值和质量控制方案。通过质量评估结果的分析,发现有必要分别对固定地段和作物地段站点进行质量控制。土壤水分自动站小时资料的质量控制方案具有很好的适用性。各个要素各层在汛期和非汛期时段可用率很高,均超过95%。

By analyzing nine soil moisture automatic stations of Changde about the volume of soil moisture, soil humidity, soil moisture by weight, available soil moisture storage capacity of hourly data, the distribution characteristics of each layer soil moisture were obtained. According to the site geography, the distribution of elements, changes in the characteristics of the crop site and fixed site for two different automatic sta- tions, during flood and non-flood periods, to give water thresholds and quality control programs layers of soil suited to local conditions. It was found that soil moisture quality control scheme has good applicability, the various elements of the layers in the flood season and non-flood periods available rate is high, more than 95%.