Start Date: 8/31/2022 8:30 AM CDT
End Date: 8/31/2022 5:00 PM CDT
Venue Name: Walmart Parking Lot Location:
6304 N 99th St
Omaha, NE United States 68134
Nebraska Well Drillers Association
Nebraska Well Drillers First Geology Tour Since 2019!
NWDA is teaming up with the Geology Department of the University of Nebraska Omaha for our first ever Urban Geology Tour. Join us as we learn about the geoloty of the Omaha Metro area. See agenda below. Please note this tour has limited space. Early registration suggested
Omaha’s Urban Geology and the Anthropocene
Field trip August 31st, W, 2022
Overall description: The sub-discipline of urban geology looks at surface and near surface geologic processes in light of how they have been modified by human activity in urban environments. With a > 60 year record of associated publications, the field of urban geology is aligned with engineering, public health, emergency management, planning and much more. This one day field trip will focus on examples of Omaha’s urban geology, and place it in the even larger discussions on the Anthropocene, which is a proposed addition to the geologic time scale.
At present field trip leaders and contributors include Drs. Dere, Luethje, and Maher of the University of Nebraska at Omaha Department of Geography and Geology. Dr. Dere has experience in researching soils and critical zone processes. Dr. Luethje researches paleoclimate and environmental change of lakes using diatoms and other tools. Dr. Maher researches Great Plains geology with a focus on structural processes and sedimentation. Additional contributors may be added.
Meet and depart from Walmart Parking lot located at 6304 N 99th St at 8:30am
Arrive at Glacier Creek Preserve at 9 AM
Dr. Dere and her students have created a critical zone observatory on the periphery of Omaha, with a semi-continuous soil gas and moisture monitoring at various depths, an array of observation water wells, and local weather stations. Cores and geophysical work have characterized the subsurface. Research on wind-blown dust, the influence of prescribed burns on soil development, on the difference between restored prairie versus farmed soils and more has been conducted. Monitoring sites exist in both agricultural and restored prairie soils. Participants will walk through the preserve to the various monitoring sites, and the research being conducted shared.
Lunch 11:30 AM-12:30 PM
Drive to Heflinger Park 12:30-1:00 PM
Heflinger Park 1:00-1:30 PM
Perched above the Papillion Creek, this old landfill was engulfed by Omaha’s western urban growth, and is an example of a legacy environmental site. Differential subsidence has required the road be repaired many times, wells to release the methane have been installed, and down slope monitoring well exist. It is now a dog park. Very short walks to the various points in the park are involved.
Drive to Heron Haven (across the street from Heflinger Park) 1:30-1:45 PM
Heron Haven 1:45-2:30 PM
This old ‘dump’ site is an example of habitat reconstruction within the city. Fed by vigorous springs fed by glacial outwash gravels, the human created wetlands not only help create habitat and a recreational opportunity for city dwellers to connect with nature, but enhances water quality, and helps a small bit with flood water storage. The substrate for some of the site is waste fill material. The site is managed by volunteers.
Drive to Carter Lake from 2:30 to 3:00
Carter Lake 3:00-3:30
This lake is the site of a well-known ox-bow lake that left a bit of Iowa on our side of the river, research using lake sediments and diatoms as a record of environmental change and sedimentation and water quality challenges will be shared. If time permits we will also relate how the airport was threatened by the 2011 flood and the response that saved it.
Drive to Bob Kerry Bridge (nearby) 3:30- 3:45 PM
3:45 - 4:45 PM Bob Kerry Bridge
This stop will focus on Missouri River flood control efforts including wing dikes, levees, and bank armoring, and their response during the 2011 flood. The pre-engineered character of the Missouri River will be contrasted with the present character as an example of why the concept of the Anthropocene has developed. In addition, the buried contamination site associated with the ASARCO smelting operations, and the associated lead superfund site in Omaha will be reviewed.
4:30 Return to initiation point and participants' cars
A guidebook will be developed that will also include some alternate stops for those interested in further investigating Omaha’s urban geology. One alternate stop will be the Keystone trail. This highly engineered urban stream has evolved significantly over the decades since it was modified. Urban flood response, bank stabilization efforts, plastics in the sediment train, and channel evolution are some of the topics that will be discussed.
No refunds are given for cancellations received after August 19, 2022