沭阳县人工与自动土壤水分观测资料对比分析
Comparative Analysis of Artificial and Automatic Soil Moisture Observation Data in Shuyang County
叶杰 1周伟 1叶剑 2漆正蓉1
作者信息
- 1. 江苏省沭阳县气象局,江苏沭阳223600
- 2. 江苏省宿迁市气象局,江苏宿迁223800
- 折叠
摘要
[目的]客观评估DZN1型自动土壤水分观测仪的监测能力.[方法]采用对比差值、逐步回归等方法,比较分析了2013年1月1日～7月31日沭阳国家农气一级站的人工与自动土壤体积含水量观测数据.[结果]人工观测值略高于自动站观测值,两者在浅层的平均差值最小,变化趋势相当一致;在分析了人工与自动观测值相关系数后,为降低DZN1型自动土壤水分观测仪的系统性误差,获得较准确的订正数据,运用逐步回归法建立了沭阳土壤水分自动站观测资料序列订正模型,并利用该站2014年4月1日～5月31日对比观测资料对其订正效果进行了检验,检验结果显著.[结论]该研究为发挥观测资料的应用价值和气象服务效益提供依据.
Abstract
[Objective] The aim was to objectively evaluate the monitoring ability of the DZN1 type automatic soil moisture monitoring instrument.[Method] By using contrast difference,regressive regression methods,artificial and automatic observation data of soil volumetric moisture content from Shuyang National Agricultural Gas primary station during Jan.1-Jul.31,2013 was compared and analyzed.[Result] The artificial observed value was slightly higher than that of the automatic station,the average difference was minimum in shallow layer,the change trend was quite consistent; after analyzing the correlation coefficient between artificial and automatic observation value,in order to reduce the systematic errors of the DZN1 type automatic soil moisture meter and obtain more accurate correction data,using the stepwise regression method,the sequence correction model of soil moisture automatic observation data in Shuyang was established.The correction effect was detected using contrast data during Apr.1-May 31,2014,the test result was significant.[Conclusion] The study provides a basis for application of the observed data and meteorological service benefit.
关键词
人工观测/自动观测/土壤水分/对比分析/订正模型Key words
Artificial observation/Automatic observation/Soil moisture/Comparative analysis/Correction model引用本文复制引用
基金项目
宿迁市气象局气象科研项目(sq201403)
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据