Project Period: 2008-2010
Cooperators: South Dakota Department of Transportation, Federal Emergency Management Agency, West Dakota Water Development District, City of Rapid City
Project Chief: Dan Driscoll
Executive Summary
Flood-frequency analyses for the Black Hills area have large uncertainties because of several complicating factors, including (1) effects of high outliers in systematic peak-flow records, such as particularly large peak discharges caused by the extraordinary 1972 storm near Rapid City; (2) geologic influences; and (3) potential influences of topography on precipitation patterns. Methods relying on analysis of systematic data are insufficient (numbers of sites and available periods of record) to address these complications. A reconnaissance-level paleoflood study for the Black Hills area was implemented in March of 2006, as a cooperative effort between the Office of Research of the South Dakota Department of Transportation (SDDOT) and the U.S. Geological Survey (USGS). The overall conclusion of this reconnaissance-level study was that improved understanding of flood frequencies for the Black Hills region would result from implementation of future studies using established paleoflood techniques. The results of the reconnaissance-level study are presented in O'Connor and Driscoll (2007).
As a follow-up to the earlier reconnaissance-level study, USGS and SDDOT initiated a subsequent cooperative program to apply paleoflood survey techniques in selected drainages in the Black Hills area. The drainages include Elk Creek, Boxelder Creek, Rapid Creek, and Spring Creek. Several additional agencies have joined as cooperators, including the Federal Emergency Management Agency, West Dakota Water Development District, and the City of Rapid City. Final results are available in Harden and others, 2011 (SIR 2011-5131). A lay-reader summary (Driscoll and others, 2012 ) also was published in cooperation with the SDDOT.
Objectives
The primary purpose of this project is to obtain improved relations between magnitudes and frequencies for especially large peak-flow events for the selected drainages through application of paleoflood techniques.
Below are multimedia items associated with this project.
Below are publications associated with this project.
Flood-frequency analyses from paleoflood investigations for Spring, Rapid, Boxelder, and Elk Creeks, Black Hills, western South Dakota
Below are partners associated with this project.
- Overview
Project Period: 2008-2010
Cooperators: South Dakota Department of Transportation, Federal Emergency Management Agency, West Dakota Water Development District, City of Rapid City
Project Chief: Dan DriscollExecutive Summary
Flood-frequency analyses for the Black Hills area have large uncertainties because of several complicating factors, including (1) effects of high outliers in systematic peak-flow records, such as particularly large peak discharges caused by the extraordinary 1972 storm near Rapid City; (2) geologic influences; and (3) potential influences of topography on precipitation patterns. Methods relying on analysis of systematic data are insufficient (numbers of sites and available periods of record) to address these complications. A reconnaissance-level paleoflood study for the Black Hills area was implemented in March of 2006, as a cooperative effort between the Office of Research of the South Dakota Department of Transportation (SDDOT) and the U.S. Geological Survey (USGS). The overall conclusion of this reconnaissance-level study was that improved understanding of flood frequencies for the Black Hills region would result from implementation of future studies using established paleoflood techniques. The results of the reconnaissance-level study are presented in O'Connor and Driscoll (2007).
As a follow-up to the earlier reconnaissance-level study, USGS and SDDOT initiated a subsequent cooperative program to apply paleoflood survey techniques in selected drainages in the Black Hills area. The drainages include Elk Creek, Boxelder Creek, Rapid Creek, and Spring Creek. Several additional agencies have joined as cooperators, including the Federal Emergency Management Agency, West Dakota Water Development District, and the City of Rapid City. Final results are available in Harden and others, 2011 (SIR 2011-5131). A lay-reader summary (Driscoll and others, 2012 ) also was published in cooperation with the SDDOT.
Objectives
The primary purpose of this project is to obtain improved relations between magnitudes and frequencies for especially large peak-flow events for the selected drainages through application of paleoflood techniques.
- Multimedia
Below are multimedia items associated with this project.
- Publications
Below are publications associated with this project.
Flood-frequency analyses from paleoflood investigations for Spring, Rapid, Boxelder, and Elk Creeks, Black Hills, western South Dakota
Flood-frequency analyses for the Black Hills area are important because of severe flooding of June 9-10, 1972, that was caused by a large mesoscale convective system and caused at least 238 deaths. Many 1972 peak flows are high outliers (by factors of 10 or more) in observed records that date to the early 1900s. An efficient means of reducing uncertainties for flood recurrence is to augment gagedAuthorsTessa M. Harden, Jim E. O'Connor, Daniel G. Driscoll, John F. Stamm - Partners
Below are partners associated with this project.