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Assessment of riverine morphology and habitat regime using nmanned aerial vehicles in a Mediterranean environment

Dimitriou Elias M., Stavroulaki Eleni

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Summary

The use of Unmanned Aerial Vehicles (UAVs) for monitoring environmental parameters presents an increasing trend in the last few years since it comprises a low cost, rapid and high spatial resolution alternative to classic remote sensing monitoring techniques. One of the most common applications of UAVs today is the development of Digital Terrain Models through photogrammetric processes which can then be used for geomorphological and habitat mapping. Monitoring the sedimentation regime in a riverine ecosystem, focusing on the fluvial habitat availability and changes is a necessary approach to assess water and soil management practices. The aim of the particular study is to assess the spatiotemporal erosion and deposition regime in a Mediterranean river using UAV photogrammetric riverbed measurements and apply habitat mapping, to quantify the suitability of the ecohydrologic conditions for a typical fish species. The output of this effort illustrated the highly dynamic sediment transfer conditions of the examined river which, however, maintained suitable fish habitats during the study period (06/2016 and 08/2017). Moreover, the results indicated that using UAVs to acquire spatial ecohydrologic and sediment relevant information in a very detailed resolution can be an efficient and accurate approach for managing vulnerable aquatic ecosystems.

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