【摘要】 探讨了TDR测定土壤含水量的原理,并对黑河上游阿柔试验样地取土样进行了土壤体积含水量测定的室内标定试验,得出相关性较好的TDR测定土壤体积含水量的关系式.结果表明:通过室内土样回填建立的TDR测定的体积含水量与土壤实际含水量相关性很好,可以利用TDR精确的测定土壤含水量,为黑河遥感项目提供精确的地面土壤水分数据,为遥感反演和验证提供基础数据.所得到的标定结果对于具有相同土质的黑河中游土壤具有参考价值.更多还原

【Abstract】 It is necessary to calibrate Time Domain Reflectometry(TDR) for a measurement that a small error is required.By calibrating,the scope of application and accuracy of TDR can be determined.In this paper,a calibration process/method of the measurement of soil water content by TDR is discussed and analyzed.In addition,the fundamental principles and theory of the measurement of soil water content by TDR has also been generally reviewed and discussed.The designed calibration experiment processes are described in detail.This calibration experiment is based on the soil samples collected in Arou experimental field located in the upper reaches of Heihe River.By the method of putting soil into a container,a very good correlation is found between the actual soil volume water content and that measured by TDR.Thus,it is sure that TDR can be use to measure soil water content accurately,and can offer the land surface soil water content for WATER project in a satisfied level,which is the basic data for the validation of remote sensing retrieval algorithms.The calibration result can also provide a valuable reference for the soil parameter measurement in the middle reaches of Heihe River where the soil quality is the same as in the upper reaches.更多还原