Applied Engineering in Agriculture · 2005 · 21 citations · 13 references
Geotechnical EngineeringHydrogeologyCesium Magnetometer SurveyClay TileEngineeringHydrogeophysicsGeomorphologySubsidence MonitoringSubsurface HydrologyCivil EngineeringGeographyCesiummagnetometer SurveysCase StudyGround-based Magnetic SurveysEngineering GeologyHydrologySubsurface SystemHydraulic Property
Identifying the existence and orientation of buried drainage systems is necessary to incorporate the impact of thesefeatures in solute transport and hydrologic models. This study was conducted to determine if a cesium magnetometer surveycould identify clay tile locations. A cesium magnetometer survey with a sampling interval of 10 cm along the survey transectand 50-cm spaced transects was used at the Oregon State University Research Dairy in an attempt to map clay tile orientationand location. A shaded-relief plot of the magnetic data from a 100- . 100-m portion of the Dairy successfully identified claytile in the western part of the study area, but was unable to identify clay tile in the eastern part of the study area. Probingand trenching confirmed the existence of clay tile in both portions of the site. This case study has shown that cesiummagnetometer surveys can locate clay tile with a spatial accuracy (horizontally) of .25 cm, and offers a new technique fornon-invasive subsurface drainage pipe location. This study has also elucidated potential limitations in this method foridentifying subsurface drainage pipe locations that may depend on soil type, management strategies, and soil magneticproperties.
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