Estimation of Temporal Changes of Volumetric Soil Water Content from Ground-Penetrating Radar Reflections

2005 ◽  
Vol 6 (2) ◽  
pp. 207-218 ◽  
Author(s):  
Ute Wollschläger ◽  
Kurt Roth
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Ground Penetrating Radar ◽  
Temporal Changes ◽  
Volumetric Soil Water Content ◽  
Ground Penetrating ◽  
Volumetric Soil Water

scholarly journals Determination of Spatial and Temporal Variations of Volumetric Soil Water Content Using Ground Penetrating Radar: A Case Study in Thailand

2016 ◽  
pp. 33-46 ◽  
Author(s):  
Thanop Thitimakorn ◽  
Suppanut Kummode ◽  
Sasikan Kupongsak
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Ground Penetrating Radar ◽  
Soil Depth ◽  
Gravimetric Analysis ◽  
Volumetric Soil Water Content ◽  
Dry Conditions ◽  
Ground Penetrating ◽  
Volumetric Soil Water

In this research, ground penetrating radar (GPR) was used to determine the volumetric soil water content (VSWC) of a loamy soil. The GPR was set up in the ground wave fixed offset me-thod using both 400 and 900 MHz frequency antennae. By estimating the relative dielectric per-mittivity of the soils, these values were converted to the VSWC by Topp’s equation. The gra-vimetrically calculated VSWC values from the soil samples at different depths were used as thereferences. In addition, the ability of the GPR method to detect variation in the VSWC over time was evaluated in three periods spanning the dry and rainy seasons. The VSWC estimated from the400 MHz analysis had a high correlation with the gravimetric method under dry conditions at a soil depth of 10-30 cm and under wet conditions, the result was reasonable at 10-20 cm. In contrast, the 900 MHz derived VSWC estimateswere not related to those from the gravimetric analysis, although the results were reasonable in dry conditions. The VSWC values obtained fromthe 400 MHz antenna give a reasonable estimation of VSWC of this site. Thus, the GPR method is appropriate for estimating the VSWC due to the ease of data acquisition and processing.

scholarly journals Effects of volumetric soil water content and fertilizer rate on growth and baicalin accumulation in two species of Scutellaria

2018 ◽  
Vol 10 (6) ◽  
pp. 97-105 ◽  
Author(s):  
Morgan Amanda ◽  
Joseph Pearson Brian ◽  
Shad Ali Gul ◽  
Moore Kimberly ◽  
Osborne Lance
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Fertilizer Rate ◽  
Volumetric Soil Water Content ◽  
Volumetric Soil Water

scholarly journals Soil water content estimation using ground penetrating radar data via group intelligence optimization algorithms: An application in the Northern Shaanxi Coal Mining Area

2020 ◽  
pp. 014459872097336
Author(s):  
Fan Cui ◽  
Jianyu Ni ◽  
Yunfei Du ◽  
Yuxuan Zhao ◽  
Yingqing Zhou
Keyword(s):  
Dielectric Constant ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Error Rate ◽  
Ground Penetrating Radar ◽  
Volumetric Water Content ◽  
Average Error ◽  
Average Error Rate ◽  
Ground Penetrating

The determination of quantitative relationship between soil dielectric constant and water content is an important basis for measuring soil water content based on ground penetrating radar (GPR) technology. The calculation of soil volumetric water content using GPR technology is usually based on the classic Topp formula. However, there are large errors between measured values and calculated values when using the formula, and it cannot be flexibly applied to different media. To solve these problems, first, a combination of GPR and shallow drilling is used to calibrate the wave velocity to obtain an accurate dielectric constant. Then, combined with experimental moisture content, the intelligent group algorithm is applied to accurately build mathematical models of the relative dielectric constant and volumetric water content, and the Topp formula is revised for sand and clay media. Compared with the classic Topp formula, the average error rate of sand is decreased by nearly 15.8%, the average error rate of clay is decreased by 31.75%. The calculation accuracy of the formula has been greatly improved. It proves that the revised model is accurate, and at the same time, it proves the rationality of the method of using GPR wave velocity calibration method to accurately calculate the volumetric water content.

Mapping the response of volumetric soil water content to an intense rainfall event at the field scale using GPR

2020 ◽  
Vol 583 ◽  
pp. 124605 ◽  
Author(s):  
Qi Cao ◽  
Xiaodong Song ◽  
Huayong Wu ◽  
Lei Gao ◽  
Feng Liu ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Rainfall Event ◽  
Intense Rainfall ◽  
Field Scale ◽  
Volumetric Soil Water Content ◽  
Volumetric Soil Water
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