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Open AccessArticle

A GIS-Based Tool for Automatic Bankfull Detection from Airborne High Resolution Dem

Department of Physics and Geology, University of Perugia, 06125 Perugia, Italy
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Current address: Viale Zefferino Faina 4, Perugia, Italy.
ISPRS Int. J. Geo-Inf. 2019, 8(11), 480; https://doi.org/10.3390/ijgi8110480
Received: 4 September 2019 / Revised: 14 October 2019 / Accepted: 21 October 2019 / Published: 24 October 2019
The ability to remotely sense bankfull elevations was of particular interest in this study because bankfull mapping depends on topographic indicators. The method proposed here and integrated in a GIS environment combines the hydraulic depth and the flow height for each cross section. The local maxima values indicate a sudden increase in flow width where water spills across the floodplain. Such an approach has been implemented as a GIS tool in the QGIS software, and provides a resulting polygonal map of the bankfull limits. The algorithm was applied on several fluvial reaches in Umbria (central Italy). The source code is available as open source. Preliminary results are presented in Section 4, comparing remotely sensed bankfull limits to those obtained from fields surveys and, more recently, by operator–expert interpretation of aerial orthophotos. View Full-Text
Keywords: bankfull; bankfull flow; feature extraction; remote sensing bankfull; bankfull flow; feature extraction; remote sensing
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De Rosa, P.; Fredduzzi, A.; Cencetti, C. A GIS-Based Tool for Automatic Bankfull Detection from Airborne High Resolution Dem. ISPRS Int. J. Geo-Inf. 2019, 8, 480.

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