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• W2097124673 abstract "Drainage channels are an integral part of agricultural landscapes, and their impact on catchment hydrology is strongly recognized. In cultivated and urbanized floodplains, channels have always played a key role in flood protection, land reclamation, and irrigation. Bank erosion is a critical issue in channels. Neglecting this process, especially during flood events, can result in underestimation of the risk in flood-prone areas. The main aim of this work is to consider a low-cost methodology for the analysis of bank erosion in agricultural drainage networks, and in particular for the estimation of the volumes of eroded and deposited material. A case study located in the Veneto floodplain was selected. The research is based on high-resolution topographic data obtained by an emerging low-cost photogrammetric method (structure-from-motion or SfM), and results are compared to terrestrial laser scanning (TLS) data. For the SfM analysis, extensive photosets were obtained using two standalone reflex digital cameras and an iPhone5® built-in camera. Three digital elevation models (DEMs) were extracted at the resolution of 0.1 m using SfM and were compared with the ones derived by TLS. Using the different DEMs, the eroded areas were then identified using a feature extraction technique based on the topographic parameter Roughness Index (RI). DEMs derived from SfM were effective for both detecting erosion areas and estimating quantitatively the deposition and erosion volumes. Our results underlined how smartphones with high-resolution built-in cameras can be competitive instruments for obtaining suitable data for topography analysis and Earth surface monitoring. This methodology could be potentially very useful for farmers and/or technicians for post-event field surveys to support flood risk management. Copyright © 2015 John Wiley & Sons, Ltd." @default.
• W2097124673 created "2016-06-24" @default.
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• W2097124673 date "2015-07-19" @default.
• W2097124673 modified "2023-09-25" @default.
• W2097124673 title "Bank erosion in agricultural drainage networks: new challenges from structure-from-motion photogrammetry for post-event analysis" @default.
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• W2097124673 doi "https://doi.org/10.1002/esp.3767" @default.
• W2097124673 hasPublicationYear "2015" @default.
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