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Water 2017, 9(7), 521; doi:10.3390/w9070521

An Examination of Soil Moisture Estimation Using Ground Penetrating Radar in Desert Steppe

China Institute of Water Resources and Hydropower Research, Beijing 100038, China
Research Center on Flood & Drought Disaster Reduction of the Ministry of Water Resources, Beijing 100038, China
Author to whom correspondence should be addressed.
Received: 5 May 2017 / Revised: 3 July 2017 / Accepted: 10 July 2017 / Published: 22 July 2017
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Ground penetrating radar (GPR) is a new technique of rapid soil moisture measurement, which is an important approach to measure soil moisture at the intermediate scale. To test the applicability of GPR method for soil moisture in desert steppe, we used the common-mid point (CMP) method and fixed offset (FO) method to evaluate the influence factors and the accuracy of GPR measurement with gravimetric soil moisture measurements. The experiments showed that Topp’s equation is more suitable than Roth’s equation for processing the GPR data in desert steppe and the soil moisture measurements by GPR had high accuracy by either CMP method or FO method. To a certain extent, the vegetation coverage affects the measurement precision and the soil moisture profile. The precipitation can reduce the effective sampling depth of the ground wave from 0.1 m to 0.05 m. The results revealed that GPR has the advantages of high measurement accuracy, easy movement, simple operation, and no damage to the soil layer structure. View Full-Text
Keywords: ground penetrating radar; GPR; soil moisture; desert steppe; gravimetric method; CMP ground penetrating radar; GPR; soil moisture; desert steppe; gravimetric method; CMP

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lu, Y.; Song, W.; Lu, J.; Wang, X.; Tan, Y. An Examination of Soil Moisture Estimation Using Ground Penetrating Radar in Desert Steppe. Water 2017, 9, 521.

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