Justin is a Hydrologist for the USGS Indiana-Kentucky Water Science Center in Louisville, KY. He is experienced with hydroacoustic instruments, bathymetric surveying, programming, and hydraulic modeling.
Master of Science, Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 2013
Bachelor of Science, Engineering (Civil/Environmental Concentration), Calvin College, 2009
Science and Products
Flood-inundation maps for the North Fork Kentucky River at Hazard, Kentucky
Digital flood-inundation maps for a 7.1-mile reach of the North Fork Kentucky River at Hazard, Kentucky (Ky.), were created by the U.S. Geological Survey (USGS) in cooperation with the Kentucky Silver Jackets and the U.S. Army Corps of Engineers Louisville District. The flood-inundation maps, which can be accessed through the USGS Flood Inundation...Boldt, Justin A.; Lant, Jeremiah G.; Kolarik, Nicholas E.
Development of a hydraulic model and flood-inundation maps for the Wabash River near the Interstate 64 Bridge near Grayville, Illinois
A two-dimensional hydraulic model and digital flood‑inundation maps were developed for a 30-mile reach of the Wabash River near the Interstate 64 Bridge near Grayville, Illinois. The flood-inundation maps, which can be accessed through the U.S. Geological Survey (USGS) Flood Inundation Mapping Science web site at http://water.usgs.gov/osw/...Boldt, Justin A.
River meander modeling of the Wabash River near the Interstate 64 Bridge near Grayville, Illinois
Natural river channels continually evolve and change shape over time. As a result, channel evolution or migration can cause problems for bridge structures that are fixed in the flood plain. A once-stable bridge structure that was uninfluenced by a river’s shape could be encroached upon by a migrating river channel. The potential effect of the...Lant, Jeremiah G.; Boldt, Justin A.
Estimating suspended sediment using acoustics in a fine-grained riverine system, Kickapoo Creek at Bloomington, Illinois
Acoustic technologies have the potential to be used as a surrogate for measuring suspended-sediment concentration (SSC). This potential was examined in a fine-grained (97-100 percent fines) riverine system in central Illinois by way of installation of an acoustic instrument. Acoustic data were collected continuously over the span of 5.5 years....Manaster, Amanda D.; Domanski, Marian M.; Straub, Timothy D.; Boldt, Justin A.
Flood-inundation maps for the East Fork White River at Shoals, Indiana
Digital flood-inundation maps for a 5.9-mile reach of the East Fork White River at Shoals, Indiana (Ind.), were created by the U.S. Geological Survey (USGS) in cooperation with the Indiana Office of Community and Rural Affairs. The flood-inundation maps, which can be accessed through the USGS Flood Inundation Mapping Science Web site at http://...Boldt, Justin A.
From mobile ADCP to high-resolution SSC: a cross-section calibration tool
Sediment is a major cause of stream impairment, and improved sediment monitoring is a crucial need. Point samples of suspended-sediment concentration (SSC) are often not enough to provide an understanding to answer critical questions in a changing environment. As technology has improved, there now exists the opportunity to obtain discrete...Boldt, Justin A.