Journal article
Quantifying the Extent of Eroding Streambanks in Iowa
Journal of the American Water Resources Association, Vol.57(3), pp.391-405
06/01/2021
DOI: 10.1111/1752-1688.12902
Abstract
Streambank erosion is a major source of sediment to rivers and it is important to find locations where severely eroding streambanks are occurring in watersheds. In this study, a new approach to mapping eroding streambanks at a regional scale was conducted using high-resolution Light Detection and Ranging (LiDAR) elevation data. By calibrating field mapping studies to LiDAR derivative data, the extent of severely eroding streambanks in third- to sixth-order streams and rivers found in Iowa was estimated. Study results suggest that over 35,200 km of streambanks may be severely eroding, or approximately 41% of all third- to sixth-order streambanks. The extent of streambank erosion was not uniform across the state with more erosion occurring in hillier western and southern Iowa compared to flatter and more recently glaciated northern Iowa. Streambank erosion was related to greater bank heights and was more prevalent (as a percent of the total stream length) in larger fifth- and sixth-order rivers. Overall, despite limitations in the study related to the collection and extrapolation of the LiDAR dataset, study results provide new evidence for the magnitude of the streambank erosion problem in Iowa and likely apply to similarly glaciated regions of the United States Midwest.
Details
- Title: Subtitle
- Quantifying the Extent of Eroding Streambanks in Iowa
- Creators
- Calvin F. Wolter - Iowa Department of Natural ResourcesKeith E. Schilling - United States Geological SurveyJason A. Palmer - Iowa Department of Natural Resources
- Resource Type
- Journal article
- Publication Details
- Journal of the American Water Resources Association, Vol.57(3), pp.391-405
- Publisher
- Wiley
- DOI
- 10.1111/1752-1688.12902
- ISSN
- 1093-474X
- eISSN
- 1752-1688
- Number of pages
- 15
- Grant note
- 2017-01 / Iowa Nutrient Research Center (INRC) RB10-014 / Iowa Department of Transportation
- Language
- English
- Date published
- 06/01/2021
- Academic Unit
- Earth and Environmental Sciences; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984383898402771
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