干旱区生态环境知识资源中心(Arid): 青藏高原高寒荒漠区土壤湿度监测仪器的校正方法探讨

Arid

	青藏高原高寒荒漠区土壤湿度监测仪器的校正方法探讨
其他题名	Calibration of the soil moisture sensor in cold desert areas on Tibetan Plateau
	谢芳荻 1; 阎建忠 1; 刘林山 1; 张镱锂 2; 王兆锋 1; 李兰晖 1; 李彩瑛 3
来源期刊	地理研究
ISSN	1000-0585
出版年	2017
卷号	36 期号:11 页码:2112-2128
中文摘要	ECH_2O EC-5土壤水分传感器能有效地监测土壤含水量,并且能揭示不同降水事件下的土壤水分动态变化状况。然而青藏高原主要土壤类型砾石含量高、昼夜温差大、秋季和春季冻融现象显著,导致监测数据出现偏差。基于对羌塘高原日土、改则地区布设的野外观测站点采集的土壤样品,对其进行土壤含水量测定的室内标定试验。结果表明:① 各个样点均获得了较好的拟合效果,基于拟合系数校正后的测量值可以有效地反映实际的土壤含水量情况;② 不同土层深度及不同样点的综合校准曲线精度明显低于单点的校准结果,主要受土壤容重和有机碳含量的影响,为获取更精准的校正数据,分层的校准是很有必要的;③ 基于已有校准模型校正后的值可以反映含水量变化的整体态势,但会产生高估或低估于真实值的偏离。
英文摘要	ECH_2O EC-5 soil moisture sensor can effectively monitor the soil moisture content, and it can reveal the soil moisture dynamic change under different rainfall events. However the main soil type has high gravel content on Tibetan plateau, and there is a large temperature disparity between day and night, especially the freezing and thawing phenomenon which frequently occurs during spring and autumn. This paper discusses the property of the EC-5 soil moisture sensor’s measuring data of soil water content, and the soil sample are taken from the field observation sites in the Qiangtang plateau western Tibetan Plateau of China. The results show that all samples have good imitative effects: (1) According to the fitted line, the measured data which had already been corrected could efficiently reflect the practical soil moisture content most R2 of the fitting were over 0.97, the fitting curve of measured data after calibration and the real value is very close to the standard curve; (2) Comprehensive calibration results of different soil depth, there are some differences of regression straight line and the ideal straight line (Y = X), when the water content is quite low the water content value after calibration is higher than the real value, when the water content is quite high the water content value after calibration is lower than the real value. When the water content between 0.06~0.12 cm~3/cm~3, the calibration result is more reliable. (3)The existing calibration model can reflect the overall situation of the water content changes, but may cause overestimate or underestimate the true value of the deviation.
中文关键词	土壤体积含水量 ; 校正 ; 介电常数 ; 容重 ; 温度 ; 青藏高原
英文关键词	soil volumetric moisture content calibration dielectric constant density temperature Tibetan Plateau
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY ; AUTOMATION CONTROL SYSTEMS
WOS研究方向	Agriculture ; Automation & Control Systems
CSCD记录号	CSCD:6119235
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235770
作者单位	1.中国科学院地理科学与资源研究所, 中国科学院陆地表层格局与模拟重点实验室, 北京 100101, 中国; 2.中国科学院地理科学与资源研究所, 中国科学院陆地表层格局与模拟重点实验室;;中国科学院青藏高原地球科学卓越创新中心, 北京 100101, 中国; 3.西南大学资源环境学院, 重庆 400716, 中国
推荐引用方式 GB/T 7714	谢芳荻,阎建忠,刘林山,等. 青藏高原高寒荒漠区土壤湿度监测仪器的校正方法探讨[J]. 中国科学院地理科学与资源研究所,2017,36(11):2112-2128.
APA	谢芳荻.,阎建忠.,刘林山.,张镱锂.,王兆锋.,...&李彩瑛.(2017).青藏高原高寒荒漠区土壤湿度监测仪器的校正方法探讨.地理研究,36(11),2112-2128.
MLA	谢芳荻,et al."青藏高原高寒荒漠区土壤湿度监测仪器的校正方法探讨".地理研究 36.11(2017):2112-2128.