Levees are civil engineering struct

Levees are civil engineering structures built to protect human lives, property, and agricultural lands during flood
events. To keep these important structures in a safe condition, continuous monitoring must be performed regularly
and thoroughly. Small rodent burrows are one of the major defects within levees; however, their early
detection and repair helps in protecting levees during flooding events. A set of laboratory experiments was conducted
to analyze the polarity change in GPR signals in the presence of subsurface voids and water-filled cavities.
Ground Penetrating Radar (GPR) surveys using multi frequency antennas (400 MHz and 900 MHz) were conducted
along an 875 meter section of the Lollie Levee near Conway, Arkansas, USA, to assess the levee's structural
integrity. Many subsurface animal burrows, water-filled cavities, clay clasts, and metallic objects were investigated
and identified. These anomalies were located at different depths and have different sizes. To ground truth the
observations, hand dug trenches were excavated to confirm several anomalies. Results show an excellent match
between GPR interpreted anomalies and the observed features. In-situ dielectric constant measurements were
used to calculate the feature depths. The results of this research show that the 900 MHz antenna has more advantages
over the 400 MHz antenna.

ผลลัพธ์ (อังกฤษ) 2:

Levees Civil Engineering structures are built to Protect Human Lives, Property, and Agricultural Lands Flood during
events. Keep to these important structures in a Safe condition, continuous Monitoring must be performed regularly
and thoroughly. Small rodent burrows are one of the major defects within levees; however, their Early
detection and Repair helps in protecting levees during flooding events. A SET of Laboratory experiments was conducted
to Analyze the polarity Change in GPR Signals in the Presence of subsurface voids and Water-filled cavities.
Ground Penetrating Radar (GPR) Surveys using Multi frequency Antennas (400 MHz and 900 MHz) were conducted
Along an 875. meter section of the Lollie Levee near Conway, Arkansas, USA, to assess the levee's structural
integrity. Animal burrows many subsurface, Water-filled cavities, Clay clasts, and Metallic Objects were investigated
and identified. These anomalies were located at different depths and have different sizes. Ground Truth to the
observations, Hand dug trenches were excavated to Confirm several anomalies. An Excellent results Show Match
between GPR anomalies and interpreted the observed features. Constant in-situ dielectric measurements were
used to Calculate the Feature depths. The results of the 900 MHz Antenna that this Research Show More has advantages
over the 400 MHz Antenna.