RT info:eu-repo/semantics/article T1 Flood Hazard Assessment Supported by Reduced Cost Aerial Precision Photogrammetry A1 Zazo, Santiago A1 Rodríguez Gonzálvez, Pablo A1 Molina, Jose Luis A1 González-Aguilera, Diego A1 Agudelo-Ruiz, Carlos Andres A1 Hernandez-Lopez, David A2 Ingeniería CartograficaGeodesica y Fotogrametria K1 Cartografía K1 flood risk assessment K1 RC-APP technique K1 Flood risk K1 Assessment K1 Ground filtering algorithm AB Increasing flood hazards worldwide due to the intensification of hydrological events andthe development of adaptation-mitigation strategies are key challenges that society must address. To minimize flood damages, one of the crucial factors is the identification of flood prone areas through fluvial hydraulic modelling in which a detailed knowledge of the terrain plays an important role for reliable results. Recent studies have demonstrated the suitability of the Reduced Cost Aerial Precision Photogrammetry (RC-APP) technique for fluvial applications by accurate-detailed-reliable Digital Terrain Models (DTMs, up to: 100 point/m2; vertical-uncertainty: 0.06 m). This work aims to provide an optimal relationship between point densities and vertical-uncertainties to generate more reliable fluvial hazard maps by fluvial-DTMs. This is performed through hydraulic models supported by geometric models that are obtained from a joint strategy based on Structure from Motion and Cloth Simulation Filtering algorithms. Furthermore, to evaluate vertical-DTM, uncertainty is proposed as an alternative approach based on the method of robust estimators. This offers an error dispersion value analogous to the concept of standard deviation of a Gaussian distribution without requiring normality tests. This paper reinforces the suitability of new geomatic solutions as a reliable-competitive sourceof accurate DTMs at the service of a flood hazard assessment. PB MDPI YR 2018 FD 2018-12-27 LK http://hdl.handle.net/10612/9278 UL http://hdl.handle.net/10612/9278 NO Remote Sensing 2018, 10, 1566 NO 1566 p. DS BULERIA. Repositorio Institucional de la Universidad de León RD 29-mar-2024