Airborne Electromagnetic Geophysical Surveys and Hydrogeologic Framework Development for Selected Sites in the Lower Elkhorn Natural Resources District, Northeastern Nebraska. These 2014 surveys were tailored to the LENRD's groundwater management goals and provided the initial paths for building out the District's and ENWRA's regional framework.

Explore the older ENWRA Projects and Reports including the initial Introduction to a Hydrogeological Study publication as well as CSD and USGS AEM survey publications for the ENWRA pilot study sites Oakland Ashland and Firth (includes associated Google Earth datasets delivered by AGF in 2016)

The Lower Loup and Middle Republican Nebraska Natural Resources Districts (NRDs) conducted AEM flights in Summer 2022 using Water Sustainability Fund (WSF) grant dollars awarded in 2021. In eastern Nebraska, a private entity in the Lower Platte South NRD also conducted an AEM reconnaissance survey in Cass County Nebraska in 2022 as a follow-up to the previous 2020 AEM Cass County survey.

ENWRA's Reconnaissance AEM Survey effort was broken into two phases: approximately 750 line-miles in the north part of eastern Nebraska flown in October 2014 and 550 line-miles in the south part flown in April 2015. Interpretation of the approximately 1,300 line-miles of AEM data collected in 2014/2015 with the SkyTEM508 system provided a subsurface characterization of the various geologic materials that correlated with pre-existing geologic information. The AEM provided detailed verification and quantification of the geology that underlies the project area. The interpretation also provided a new understanding of the glacial and bedrock features present in the subsurface.

Lithologic descriptions from test holes and other supporting down-hole geologic and geophysical information from the University of Nebraska Conservation and Survey Division(CSD) provided the most useful historical information in the development of the new hydrogeologic framework.