摘要
分析了基于频域频率步进连续波-时域反射法(SFCW-TDR)技术的测墒仪在辽宁省西部代表地块进行土壤含水率监测能力。该技术主要应用半应用半理论公式,可以根据高频电磁波在插入土层中的TDR探针上测得的准确行程时间t推求土壤体积含水率。通过在不同地块比测和同一点长时间连续比测,两者测量数据绝对误差均在2%以内,可为地方防汛抗旱决策提供快速准确的数据支撑。
This paper analyzes the soil moisture measure instrument measuring capabilities in the representative areas of Western Liaoning Province based on SFCW-TDR technology.The technology mainly uses the semiapplied&semi-theoretical formula.The soil volume moisture content can be calculated according to the accurate travel time t,measured by the high-frequency electromagnetic wave on the TDR probe inserted into the soil layer.The absolute error of the two measurements is less than 2%through comparison in different plots and continuous comparison at the same point for a period of time.It can be applied in practice to provide fast and accurate data support for local flood prevention and drought relief decision-making.
作者
祖佳
ZU Jia(Chaoyang Hydrology Bureau of Liaoning Province,Chaoyang 122000)
出处
《中国防汛抗旱》
2021年第8期42-45,共4页
China Flood & Drought Management
